Brocade Communications Systems 5600 vRouter User manual

Supporting Brocade 5600 vRouter 4.2R1
CONFIGURATION GUIDE
Brocade 5600 vRouter
Bridging Configuration Guide
53-1004250-01
16 May 2016

© 2016, Brocade Communications Systems, Inc. All Rights Reserved.
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Contents
Preface..........................................................................................................................................................................................................................................................................................5
Document conventions............................................................................................................................................................................................................................................. 5
Text formatting conventions.........................................................................................................................................................................................................................5
Command syntax conventions...................................................................................................................................................................................................................5
Notes, cautions, and warnings.....................................................................................................................................................................................................................6
Brocade resources.......................................................................................................................................................................................................................................................6
Contacting Brocade Technical Support........................................................................................................................................................................................................... 6
Brocade customers........................................................................................................................................................................................................................................... 6
Brocade OEM customers.............................................................................................................................................................................................................................. 7
Document feedback.................................................................................................................................................................................................................................................... 7
About This Guide.................................................................................................................................................................................................................................................................... 9
Bridging Overview..................................................................................................................................................................................................................................................................11
Layer 2 bridging.............................................................................................................................................................................................................................................................11
MTU for bridge groups..............................................................................................................................................................................................................................................11
Spanning Tree Protocol.............................................................................................................................................................................................................................................11
Bridging Configuration Examples................................................................................................................................................................................................................................15
Basic bridging configuration................................................................................................................................................................................................................................. 15
Configuring bridge ports......................................................................................................................................................................................................................................... 16
Bridge Group Commands................................................................................................................................................................................................................................................19
Related bridge group commands......................................................................................................................................................................................................................19
clear bridge <brx> macs........................................................................................................................................................................................................................................... 21
clear bridge <brx> macs mac-address <mac-address>.......................................................................................................................................................................22
clear bridge <brx> macs port <port>................................................................................................................................................................................................................23
clear bridge <brx> macs port <port> mac-address <mac-address>............................................................................................................................................. 24
interfaces bridge <brx>............................................................................................................................................................................................................................................25
interfaces bridge <brx> address <address>................................................................................................................................................................................................. 26
interfaces bridge <brx> aging...............................................................................................................................................................................................................................27
interfaces bridge <brx> description <desc>................................................................................................................................................................................................. 28
interfaces bridge <brx> disable...........................................................................................................................................................................................................................29
interfaces bridge <brx> disable-link-detect.................................................................................................................................................................................................30
interfaces bridge <brx> ipv6 address................................................................................................................................................................................................................31
interfaces bridge <brx> ipv6 disable-forwarding......................................................................................................................................................................................32
interfaces bridge <brx> ipv6 dup-addr-detect-transmits <num>...................................................................................................................................................33
interfaces bridge <brx> ipv6 router-advert..................................................................................................................................................................................................34
interfaces bridge <brx> mac <mac-addr>..................................................................................................................................................................................................... 37
interfaces bridge <brx> spanning-tree........................................................................................................................................................................................................... 38
interfaces bridge <brx> spanning-tree forwarding-delay <delay>.................................................................................................................................................. 39
interfaces bridge <brx> spanning-tree hello-time <interval>...............................................................................................................................................................41
interfaces bridge <brx> spanning-tree max-age <interval>................................................................................................................................................................42
interfaces bridge <brx> spanning-tree priority <priority>..................................................................................................................................................................... 44
interfaces bridge <brx> spanning-tree tx-hold-count <count>.........................................................................................................................................................45
interfaces bridge <brx> spanning-tree version <stp | rstp>.................................................................................................................................................................46
monitor interfaces bridge <brx>..........................................................................................................................................................................................................................47
show bridge...................................................................................................................................................................................................................................................................48
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show bridge <brx> macs........................................................................................................................................................................................................................................ 49
show bridge <brx> macs mac-address <mac-address>..................................................................................................................................................................... 50
show bridge <brx> macs port <port>.................................................................................................................................................................................................................51
show bridge <brx> macs port <port> mac-address <mac-address>............................................................................................................................................ 52
show bridge <brx> spanning-tree <brief>.....................................................................................................................................................................................................53
show bridge <brx> spanning-tree bridge <brief>......................................................................................................................................................................................55
show bridge <brx> spanning-tree port <port>............................................................................................................................................................................................ 57
Bridge Interface Commands.........................................................................................................................................................................................................................................59
clear interfaces bridge counters........................................................................................................................................................................................................................60
interfaces dataplane <interface-name> bridge-group............................................................................................................................................................................61
interfaces dataplane <interface> vif <vif-id> bridge-group.................................................................................................................................................................63
show interfaces bridge............................................................................................................................................................................................................................................65
monitor interfaces bridge <brx>......................................................................................................................................................................................................................... 66
Supported Interface Types..............................................................................................................................................................................................................................................67
List of Acronyms..................................................................................................................................................................................................................................................................69
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Preface
∙Document conventions.....................................................................................................................................................................................................5
∙Brocade resources...............................................................................................................................................................................................................6
∙Contacting Brocade Technical Support...................................................................................................................................................................6
∙Document feedback............................................................................................................................................................................................................7
Document conventions
The document conventions describe text formatting conventions, command syntax conventions, and important notice formats used in
Brocade technical documentation.
Text formatting conventions
Text formatting conventions such as boldface, italic, or Courier font may be used in the flow of the text to highlight specific words or
phrases.
Format Description
bold text Identifies command names
Identifies keywords and operands
Identifies the names of user-manipulated GUI elements
Identifies text to enter at the GUI
italic text Identifies emphasis
Identifies variables
Identifies document titles
Courier font Identifies CLI output
Identifies command syntax examples
Command syntax conventions
Bold and italic text identify command syntax components. Delimiters and operators define groupings of parameters and their logical
relationships.
Convention Description
bold text Identifies command names, keywords, and command options.
italic text Identifies a variable.
value In Fibre Channel products, a fixed value provided as input to a command option is printed in plain text, for
example, --show WWN.
[ ] Syntax components displayed within square brackets are optional.
Default responses to system prompts are enclosed in square brackets.
{ x | y | z } A choice of required parameters is enclosed in curly brackets separated by vertical bars. You must select
one of the options.
In Fibre Channel products, square brackets may be used instead for this purpose.
x | yA vertical bar separates mutually exclusive elements.
< > Nonprinting characters, for example, passwords, are enclosed in angle brackets.
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Convention Description
... Repeat the previous element, for example, member [ member ...].
\ Indicates a “soft” line break in command examples. If a backslash separates two lines of a command
input, enter the entire command at the prompt without the backslash.
Notes, cautions, and warnings
Notes, cautions, and warning statements may be used in this document. They are listed in the order of increasing severity of potential
hazards.
NOTE
A Note provides a tip, guidance, or advice, emphasizes important information, or provides a reference to related information.
ATTENTION
An Attention statement indicates a stronger note, for example, to alert you when traffic might be interrupted or the device might
reboot.
CAUTION
A Caution statement alerts you to situations that can be potentially hazardous to you or cause damage to hardware, firmware,
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are also attached directly to products to warn of these conditions or situations.
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White papers, online demonstrations, and data sheets are available through the Brocade website.
Contacting Brocade Technical Support
As a Brocade customer, you can contact Brocade Technical Support 24x7 online, by telephone, or by e-mail. Brocade OEM customers
contact their OEM/Solutions provider.
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For product support information and the latest information on contacting the Technical Assistance Center, go to http://
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If you have purchased Brocade product support directly from Brocade, use one of the following methods to contact the Brocade
Technical Assistance Center 24x7.
Preface
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Online Telephone E-mail
Preferred method of contact for non-urgent
issues:
∙My Cases through MyBrocade
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Please include:
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Preface
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Preface
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About This Guide
This guide describes how to configure Layer 2 bridging on the Brocade 5600 vRouter (referred to as a virtual router, vRouter, or router
in the guide).
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About This Guide
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Bridging Overview
∙Layer 2 bridging.................................................................................................................................................................................................................... 11
∙MTU for bridge groups......................................................................................................................................................................................................11
∙Spanning Tree Protocol.....................................................................................................................................................................................................11
Layer 2 bridging
Bridging allows you to connect multiple network segments (typically LAN segments) at the Layer 2 level.
Since bridging occurs at Layer 2 (the data link layer) and IP addresses are relevant only on Layer 3 (the network layer), IP addresses are
not allowed on the interfaces being bridged.
To create a bridge:
1. Create the bridge group. You create a bridge group by defining a bridge interface and setting its characteristics.
2. Add the interfaces to the bridge group. You do this within the configuration node for the interface itself.
The following interface types can be added directly to bridge groups:
∙Physical data plane interfaces
∙VLAN interfaces
MTU for bridge groups
The effective maximum transmission unit (MTU) size for a bridge group is the minimum MTU of all the interfaces that belong to the
bridge group. So, the maximum frame size of frames transmitted by the bridged interfaces will be this effective MTU size.
Spanning Tree Protocol
Spanning Tree Protocol (STP) is a network protocol that ensures a loop-free topology for Ethernet networks. The basic function of STP
is to prevent bridge loops. Spanning tree also allows a network design to include redundant links to provide automatic backup paths if an
active link fails, thus, eliminating the need to manually enable or disable the backup links.
Brocade 5600 vRouter supports Rapid Spanning Tree Protocol (RSTP) that is an enhancement of the STP and provides the following
advantages.
∙Rapid convergence—Convergence in a standard STP network can take 30 to 50 seconds. The transition of a port to the
forwarding state is passive and is based on various timers that are timing out. RSTP provides significantly faster spanning tree
convergence after the topology changes by introducing new convergence behaviors and bridge port roles. RSTP responds to
topology changes within 3 x hello times (default 3 x 2 seconds) or within a few milliseconds of a physical link failure.
∙802.1D legacy interoperability—RSTP interoperates fully with older STP switches. Although the introduction of a 802.1D STP
switch means that the network loses its fast convergence benefit, the network is still able to run in a loop-free topology because
RSTP interoperates with STP. Typically, a network is designed with all-RSTP bridges, but the backward compatibility ensures
that the accidental introduction of an old STP bridge does not cause an outage.
The difference between the STP and RSTP spanning tree versions follow.
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TABLE 1 Difference between the STP and RSTP versions
STP RSTP
In a stable topology, only the root sends Bridge Protcol Data Units
(BPDU)s that are relayed by others.
In a stable topology, all bridges generate BPDUs every hello interval (2
seconds). These are used as keep-alive mechanisms.
The following port states are supported:
∙Disabled
∙Blocking
∙Listening
∙Learning
∙Forwarding
The following port states are supported:
∙Disabled
∙Discarding
∙Learning
∙Forwarding
Blocking and listening states are replaced with discarding state. The
disabled state is not a part of the Rapid STP specification, but is used
when the vRouter interface is set to the down state.
The following port roles are supported:
∙Root (Forwarding)
∙Designated (Forwarding)
∙Blocking
The port that receives the best BPDU on a bridge, is the root port, that is,
the port closest to the root bridge in terms of path cost.
A port is a designated port if it can send the best BPDU on the segment
to which it is connected. On a given segment, there can be only one path
toward the root bridge.
A blocking port is defined as not being the designated or root port.
The following port roles are supported:
∙Root (Forwarding)
∙Designated (Forwarding)
∙Alternate (Discarding)
∙Backup (Discarding)
The blocking port role is split into the backup and alternate port roles.
A port is a designated port if it can send the best BPDU on the segment
to which it is connected. On a given segment, there can only be one path
towards the root bridge.
An alternate port is a port that receives more useful BPDUs from another
bridge and is a blocked port.
A backup port receives more useful BPDUs from the same bridge that it
is on and is a blocked port.
STP uses the following timers for convergence (advertised by the root
bridge):
∙Hello—2 seconds
∙Max Age—20 seconds (10 missed hellos)
∙Forward Delay—15 seconds
The proposal-and-agreement process for synchronization is less than 1
second.
Hello, max age, and forward delay timers are used only for backward
compatibility with standard STP.
Only RSTP port receiving STP (802.1d) messages behave as standard
STP.
Slow transition that is 50 seconds, which is as follows:
∙Blocking (20 seconds)
∙Listening (15 seconds)
∙Learning (15 seconds)
∙Forwarding
Faster transition on point-to-point and edge ports only. There are fewer
states and no learning state. RSTP actively looks for possible failure by
Request Link Query (RLQ), a feedback mechanism.
Uses only two bits in the BPDU flag octet.
∙Bit 7—Topology Change Acknowledgement (TCA) Bit
∙Bit 0—Topology Change
Uses other six bits of the flag octet (for BPDU type 2 or version 2):
∙Bit 1: Proposal bit
∙Bits 2 and 3 : Port role bit
∙Bit 4 : Learning bit
∙Bit 5 : Forwarding bit
∙Bit 6 : Agreement bit
∙Bits 0 and 7 : TCA and TCN for backward compatibility
The bridge that discovers a change in the network informs the root, which
in turn informs all others by sending BPDUs with the TCA bit set and
instructs them to clear their data base entries after the short timer
(~Forward delay) expires.
A topology Change (TC) is flooded through the network, every bridge
generates a TC and informs its neighbors when it is aware of a TC and
immediately deletes old data base entries.
Bridging Overview
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TABLE 1 Difference between the STP and RSTP versions (continued)
STP RSTP
If a nonroot bridge does not receive a hello for a max-age interval of time
on a root port, the STP starts claiming the root role by generating its own
BPDU.
Waits for 3 times the hello on a root port before deciding to act.
Bridging Overview
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Bridging Overview
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Bridging Configuration Examples
∙Basic bridging configuration.........................................................................................................................................................................................15
∙Configuring bridge ports.................................................................................................................................................................................................16
Basic bridging configuration
This section presents a sample configuration for a basic bridge between two Ethernet segments on a Brocade vRouter.
NOTE
For information on bridging with GRE tunnels, see Brocade 5600 vRouter Tunnels Configuration Guide .
NOTE
In the vRouter, a data plane interface is an abstraction that represents the underlying physical or virtual Ethernet interface of the
system. The terms Ethernet interface and data plane interface are synonymous in this guide.
When you have finished, the system will be configured as shown in the following figure.
FIGURE 1 Basic bridging
In this example, you create a bridge interface and assign the data plane interfaces to the bridge group.
#GUID-A85F6211-3A29-4DFB-921D-DBF93F388ACA/TAB_1749631 creates the bridge interface and adds the data plane
interfaces to the bridge group. To do this, perform the following steps on R1 in configuration mode.
TABLE 2 Configuring a bridge between two data plane interfaces
Step Command
Create the bridge interface. vyatta@R1# set interfaces bridge br0
Add the dp0p1p1 interface to the
bridge group. vyatta@R1# set interfaces dataplane dp0p1p1 bridge-group bridge br0
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TABLE 2 Configuring a bridge between two data plane interfaces (continued)
Step Command
Add the dp0p1p2 interface to the
bridge group. vyatta@R1# set interfaces dataplane dp0p1p2 bridge-group bridge br0
Commit the configuration. vyatta@R1# commit
View the configuration. vyatta@R1# show interfaces
bridge br0 {
}
dataplane dp0p1p1 {
bridge-group {
bridge br0
}
}
dataplane dp0p1p2 {
bridge-group {
bridge br0
}
}
Configuring bridge ports
This section provides a sample configuration for two bridges between Ethernet segments on two Brocade vRouters.
NOTE
In the vRouter, a data plane interface is an abstraction that represents the underlying physical or virtual Ethernet interface of the
system. The terms Ethernet interface and data plane interface are synonymous in this guide.
The following example shows two main types of bridge port configurations: a bridge-to-bridge port and an edge port. The same
configuration applies to both bridges.
FIGURE 2 Configuring bridge ports
Ports are configured as edge ports if they are attached to a LAN that has no other bridges attached. These edge ports transition directly
to the forwarding state. RSTP still continues to monitor the port for BPDUs if a bridge is connected. RSTP can also be configured to
automatically detect edge ports. As soon as the bridge detects a BPDU coming to an edge port, the port becomes a nonedge port.
When you have finished, the system is configured as shown in the following figure.
Table 3 shows how to create the bridge interface and add the data plane interfaces and port configurations to both bridge groups.
To do this, perform the following steps on both R1 and R2 in configuration mode.
Bridging Configuration Examples
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TABLE 3 Configuring bridge ports
Step Command
Create the bridge interface. vyatta@R1# set interfaces bridge br0
Enable spanning tree. vyatta@R1# set interfaces bridge br0 spanning-tree
Add dp0s1 and dp0s2 interfaces
to the bridge. vyatta@R1# set interfaces dataplane dp0s1 bridge-group bridge br0
vyatta@R1# set interfaces dataplane dp0s2 bridge-group bridge br0
Configure host-facing interfaces
as edge ports. vyatta@R1# set interfaces dataplane dp0s1 bridge-group admin-edge
vyatta@R1# set interfaces dataplane dp0s1 bridge-group auto-edge
Commit the configuration. vyatta@R1# commit
Use the show brief command to
verify the following configurations.
∙The bridge-to-bridge
port is of point-to-point
type.
∙The host-facing port is
of edge type .
∙Both ports are RSTP
version.
vyatta@R1:~$
show bridge br0 spanning-tree brief
Bridge br0
Designated Root 8.000.52:54:00:00:01:01
Designated Root Cost 1000
Designated Root Port dp0s2 (2)
Bridge ID 8.000.52:54:00:00:02:02
Port State Role Cost Prio Type Ver
dp0s1 (1) forwarding Desg 2000 8 edge rstp
dp0s2 (2) forwarding Root 1000 8 p2p rstp
Bridging Configuration Examples
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Bridging Configuration Examples
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Bridge Group Commands
∙Related bridge group commands..............................................................................................................................................................................19
∙clear bridge <brx> macs...................................................................................................................................................................................................21
∙clear bridge <brx> macs mac-address <mac-address>.............................................................................................................................. 22
∙clear bridge <brx> macs port <port>........................................................................................................................................................................23
∙clear bridge <brx> macs port <port> mac-address <mac-address>.....................................................................................................24
∙interfaces bridge <brx>....................................................................................................................................................................................................25
∙interfaces bridge <brx> address <address>.........................................................................................................................................................26
∙interfaces bridge <brx> aging...................................................................................................................................................................................... 27
∙interfaces bridge <brx> description <desc>.........................................................................................................................................................28
∙interfaces bridge <brx> disable.................................................................................................................................................................................. 29
∙interfaces bridge <brx> disable-link-detect........................................................................................................................................................ 30
∙interfaces bridge <brx> ipv6 address....................................................................................................................................................................... 31
∙interfaces bridge <brx> ipv6 disable-forwarding............................................................................................................................................. 32
∙interfaces bridge <brx> ipv6 dup-addr-detect-transmits <num>...........................................................................................................33
∙interfaces bridge <brx> ipv6 router-advert..........................................................................................................................................................34
∙interfaces bridge <brx> mac <mac-addr>.............................................................................................................................................................37
∙interfaces bridge <brx> spanning-tree...................................................................................................................................................................38
∙interfaces bridge <brx> spanning-tree forwarding-delay <delay>..........................................................................................................39
∙interfaces bridge <brx> spanning-tree hello-time <interval>.......................................................................................................................41
∙interfaces bridge <brx> spanning-tree max-age <interval>........................................................................................................................42
∙interfaces bridge <brx> spanning-tree priority <priority>.............................................................................................................................44
∙interfaces bridge <brx> spanning-tree tx-hold-count <count>................................................................................................................ 45
∙interfaces bridge <brx> spanning-tree version <stp | rstp>........................................................................................................................ 46
∙monitor interfaces bridge <brx>................................................................................................................................................................................. 47
∙show bridge.......................................................................................................................................................................................................................... 48
∙show bridge <brx> macs................................................................................................................................................................................................49
∙show bridge <brx> macs mac-address <mac-address>.............................................................................................................................50
∙show bridge <brx> macs port <port>........................................................................................................................................................................ 51
∙show bridge <brx> macs port <port> mac-address <mac-address>....................................................................................................52
∙show bridge <brx> spanning-tree <brief>.............................................................................................................................................................53
∙show bridge <brx> spanning-tree bridge <brief>............................................................................................................................................. 55
∙show bridge <brx> spanning-tree port <port>....................................................................................................................................................57
Related bridge group commands
This chapter lists the commands used to create the bridge group (the bridge interface) and define its characteristics.
Commands for using other system features with bridge groups can be found in the following locations.
Related Commands Documented Elsewhere
ARP commands ARP is supported by bridge interfaces. Commands for working with ARP are described in Brocade
5600 vRouter Basic System Configuration Guide .
DHCP commands DHCP is supported by bridge groups. For DHCP-related commands, refer to Brocade 5600
vRouter Services Configuration Guide .
Firewall Firewall is supported by bridge groups. Commands for configuring firewall are described in Brocade
5600 vRouter Firewall Configuration Guide .
Policy-based routing Policy-based routing is supported by bridge groups. Commands for configuring policy-based
routing are described in Brocade 5600 vRouter Policy-based Routing Configuration Guide .
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Related Commands Documented Elsewhere
OSPF OSPF is supported by bridge groups. Commands for configuring OSPF are described in Brocade
5600 vRouter OSPF Configuration Guide .
QoS Quality-of-service (QoS) traffic policies are supported by bridge groups. Commands for configuring
QoS are described in Brocade 5600 vRouter QoS Configuration Guide .
RIP RIP is supported by bridge groups. Commands for configuring RIP are described in Brocade 5600
vRouter RIP Configuration Guide .
RIPng RIPng is supported by bridge groups. Commands for configuring RIPng are described in Brocade
5600 vRouter RIPng Configuration Guide .
Bridge Group Commands
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