Supermicro L2 User manual

L2 / L3 Switches
VLAN
Configuration Guide
Revision 1.0

VLAN Configuration Guide
Supermicro L2/L3 Switches
Configuration Guide
2
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VLAN Configuration Guide
Supermicro L2/L3 Switches
Configuration Guide
3
Contents
1 VL N Configuration Guide .................................................................................................................... 4
1.1 VL N Basics ................................................................................................................................... 5
1.2 VL N Support ................................................................................................................................ 5
1.3 VL N Numbers .............................................................................................................................. 7
1.4 VL N Defaults ............................................................................................................................... 8
1.5 Creating VL Ns .............................................................................................................................. 9
1.6 Modifying VL Ns ......................................................................................................................... 10
1.7 Removing VL Ns ......................................................................................................................... 10
1.8 VL N Name ................................................................................................................................. 10
1.9 Port Based VL Ns ........................................................................................................................ 12
1.9.1 ccess Ports ........................................................................................................................ 13
1.9.2 Trunk Ports .......................................................................................................................... 15
1.9.3 Hybrid Ports ........................................................................................................................ 21
1.9.4 cceptable Frame Types ..................................................................................................... 24
1.10 M C Based VL N ........................................................................................................................ 26
1.11 Protocol Based VL N .................................................................................................................. 28
1.12 VL N Configuration Example ...................................................................................................... 32

VLAN Configuration Guide
Supermicro L2/L3 Switches
Configuration Guide
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1VLAN Configuration Guide
This document describes the Virtual Local rea Network (VL N) feature supported in Supermicro Layer 2
/ Layer 3 switch products.
This document covers the VL N configurations for the below listed Supermicro switch products.
The majority of this document applies to all the above listed Supermicro switch products. In any
particular sub section however, the contents might vary across these switch product models. In those
sections the differences are clearly identified with reference to particular switch product models. If any
particular switch product model is not referenced, the reader can safely assume that the content is
applicable to all the above listed models.
Throughout this document, the common term “switch” refers to any of the above listed
Supermicro switch product models unless a particular switch product model is noted.
This
document covers only Layer 2 Static VL Ns
.
D
ynamic VL N feature
s
are
explained in
the
Dynamic VL N Configuration Guide.
Top of Rack Switches
• SSE-G24-TG4
• SSE-G48-TG4
• SSE-X24S
• SSE-X3348S
• SSE-X3348T
Blade Switches
• SBM-GEM-X2C
• SBM-GEM-X2C+
• SBM-GEM-X3S+
• SBM-XEM-X10SM

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1.1 VLAN Basics
Virtual L N (VL N) is a logical switched L N formed by segmenting physical Local rea Networks
(L Ns).
Segmenting a switched L N as one or more VL Ns provides the following advantages:
⇒Limits multicast and broadcast flood only to the required segments of the L N to save L N
bandwidth
⇒Provides secured L N access by limiting traffic to specific L N segments
⇒Eases management by logically grouping ports across multiple switches
Figure VLAN-1: VLANs on a Switched LAN
VL Ns work in same way as physical L Ns. The packets from the end stations of a VL N are switched
only to other end stations or network devices inside that VL N. To reach devices in another VL N, the
packets have to be routed from one VL N to another. Supermicro L2/L3 switches support such
InterVL N Routing to route packets across different VL Ns. InterVL N Routing is done by creating
“Layer 3 Interface VL Ns”.
This document covers only Layer 2
VL Ns
.
The Layer 3
Interface
VL N feature is explained in
the IP Configuration Guide.
1.2 VLAN Support
Supermicro switches support the three types of VL Ns – M C Based VL Ns, Protocol Based VL Ns and
Port Based VL Ns.
VL N 20
62.10.0.0 IP Subnet
VL N 20
VL N 40
44.23.0.0 IP Subnet
Switch

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Supermicro L2/L3 Switches
Configuration Guide
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Figure VLAN-2: Ty es of VLANs Su orted
Once a packet is received, a switch tries to identify the VL N for the received packet. This VL N
identification is done according to the procedure below.
If the incoming packet has a VL N tag and the VL N ID in the tag is not equal to zero, then this VL N ID
is used as the VL N for this packet.
If the incoming packet does not have a VL N tag (untagged packet) or if the VL N ID in the V LN tag is
equal to zero (priority tagged packet), the packet is considered as untagged/priority tagged and the
below steps are used to identify the VL N for this untagged/priority tagged packet.
Step 1: Use the source M C of the incoming packet and check the M C VL N mapping. If the VL N is
found for this source M C, that VL N ID is used as the VL N for this packet. If the M C VL N is not
found, proceed to the next step.
Step 2: Use the protocol field from the incoming packet layer 2 header and check the protocol VL N
table. If a protocol VL N is found, that VL N ID is used as the VL N for this packet. If a protocol VL N is
not found, proceed to the next step.
Step 3: Use the PVID from the port on which the packet is received as the VL N ID for this packet.
This VL N identification procedure is shown in Figure VL N-3: VL N Identification Procedure.
Once the VL N is identified for the received packet, it will be forwarded to any other member port of
this VL N based on the forwarding logic. If there are no other member ports for this VL N, the packet
will most likely be dropped unless it was routed or sent to the CPU or redirected by an CL rule.
M C Based
VL N
Protocol
Based VL N
Port Based
VL N

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Figure VLAN-3: VLAN Identification Procedure
1.3 VLAN Numbers
Supermicro switches support VL N identifiers from 1 to 4069 for user created VL Ns. VL N identifiers
4070 to 4094 are reserved for internal use.
The number of supported VL Ns differs among different models of Supermicro switch products as
shown in the table below.
Switch Product Number of VLANS Supported
SSE-G24-TG4 1024
Packet has
VLAN tag?
VLAN ID
!= 0
?
Check Src MAC for
MAC VLAN
Found MAC
VLAN ?
Check Protocol VLAN
Found Proto
VLAN ?
Use PVID
Found VLAN
Use VL N I
D
from VL N tag
Use MAC
VLAN ID
Use Protocol
VLAN ID
Use PVID as
VLAN ID
Yes
Yes
Yes
Yes
No
No
No
No

VLAN Configuration Guide
Supermicro L2/L3 Switches
Configuration Guide
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SSE-G48-TG4
SBM-GEM-X2C
SBM-GEM-X2C+
SBM-GEM-X3S+
SSE-X24S
SBM-XEM-X10SM
SSE-X3348S
SSE-X3348T
4094
The command “
show vlan device info
” displays
the
maximum VL N identifier
s
and total
number of VL Ns supported by the switch.
ll the above switch models support 1024 M C based VL Ns.
Supermicro switches support 16 protocol groups for protocol based VL Ns. These 16 protocol groups
can be mapped to different VL Ns in every port. Same protocol group can be associated with different
VL N in different port.
1.4 VLAN Defau ts
Supermicro switches boot up with VL N 1, which is a default Layer 2 VL N. The switchable ports of all
switches are added to this default VL N 1 as access ports. This default setup helps switch forwarding
traffic across all the ports without the need of any user configuration.
Users can modify the port members of this VL N 1 by adding or removing any ports to this VL N 1 as
either tagged or untagged ports.
VL N 1 cannot be deleted by
the
user.
Instead
, a
user can remove all the ports from VL N 1
to make it nonfunctional. This can be done by using the “no orts” command in VL N the
configuration mode in CLI.
The port based VL N identifier (PVID) for all the switch ports is set to 1 by default. The PVID is used to
associate incoming untagged packets to port based VL Ns. Users can modify the PVID for switch ports to
any VL N identifier.
The switch port mode is set to “hybrid” for all switch ports by default. Users can change the port mode
as explained in the Port Based VL N Section.

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VL N 1 is configured as the default native VL N for all trunk interfaces. Users can change the native
VL Ns for trunk interfaces as explained in section Native VL N on Trunk.
Protocol based VL N is enabled by default.
Supermicro switches do not create VL Ns by default except
for
VL N 1. Users need to
create all the VL Ns used on their network in Supermicro switches. Trunk ports will be able
to carry only VL Ns created in Supermicro switches.
1.5 Creating VLANs
Follow the steps below to create VL Ns in Supermicro switches.
Ste Command Descri tion
Step 1
configure terminal
Enter
s
the configuration mode
Step 2
vlan
<
vlan-list
>
Create
s
a
VL N
using
vlan
command.
vlan-list – may be any vlan number or
list of vlan numbers. Multiple vlan
numbers can be provided as comma-
separated values. Consecutive vlan
numbers can be provided as a range,
such as 5-10.
User can configure VL Ns with
identifiers 1 to 4069.
Step 3
show vlan
D
isplay
s
the configured VL Ns
Step 4
write startu
-
config
Optional step
–
Save these VL N
configuration to be part of startup
configuration.
The examples below show various ways of creating VL Ns.
Create a VLAN with identifier 10
SMIS# configure terminal
SMIS(config)# vlan 10
SMIS(config-vlan)# exit
Create VLANs with identifiers 20 to 30, 50 and 100
SMIS# configure terminal
SMIS(config)# vlan 20-30,50,100
SMIS(config-vlan)# exit

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1.6 Modifying VLANs
To modify a configured VL N, follow the same steps used to create a VL N as explained in the Creating
VL Ns section.
1.7 Removing VLANs
Follow the steps below to remove VL Ns from Supermicro switches.
Ste Command Descri tion
Step 1
configure terminal
Enter the configuration mode
Step 2
no v
lan <
vlan-list
>
Remove
VL N
s
using
the
no v
lan
command.
vlan-list – may be any vlan number or
list of vlan numbers. Multiple vlan
numbers can be provided as comma
separated list. Consecutive vlan
numbers can be provided as ranges like
5-10.
Step
3
show vlan
To display the configured VL Ns
Step
4
write startu
-
config
Optional step
–
Save these VL N
configuration to be part of startup
configuration.
The below examples show sample ways to remove VL Ns.
Delete a VLAN with identifier 10
SMIS# configure terminal
SMIS(config)# no vlan 10
Delete VLANs with identifier 20 to 30, 50 and 100
SMIS# configure terminal
SMIS(config)# no vlan 20-30,50,100
SMIS(config-vlan)# exit
1.8 VLAN Name
VL Ns can be associated with a label name string for easier configuration and identification.
Follow the steps below to add or modify a name string to any VL N in Supermicro switches.