H3C S5830V2 series User manual

H3C S5830V2 & S5820V2 Switch Series
TRILL Configuration Guide
Hangzhou H3C Technologies Co., Ltd.
http://www.h3c.com
Software version: Release 23xx
Document version: 6W102-20150315

Copyright © 2014-2015, Hangzhou H3C Technologies Co., Ltd. and its licensors
All rights reserved
No part of this manual may be reproduced or transmitted in any form or by any means without prior
written consent of Hangzhou H3C Technologies Co., Ltd.
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SecEngine, SecPath, SecCenter, SecBlade, Comware, ITCMM and HUASAN are trademarks of
Hangzhou H3C Technologies Co., Ltd.
All other trademarks that may be mentioned in this manual are the property of their respective owners
Notice
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute the warranty of any kind, express or implied.

Preface
The H3C S5830V2 & S5820V2 documentation set includes 16 configuration guides. These guides
describe the software features for the H3C S5830V2 & S5820V2 Switch Series and guide you through
the software configuration procedures. These guides also provide configuration examples to help you
apply software features to different network scenarios.
The TRILL Configuration Guide describes the background, fundamentals, and configuration of TRILL.
This preface includes:
•Audience
•Added and modified features
•Conventions
•About the H3C S5830V2 & S5820V2 documentation set
•Obtaining documentation
•Technical support
•Documentation feedback
Audience
This documentation is intended for:
•Network planners
•Field technical support and servicing engineers
•Network administrators working with the S5830V2 & S5820V2 series
Added and modified features
Release 2311P05 does not contain any changes to TRILL over Release 2311P04.
Release 2311P04 does not contain any changes to TRILL over Release 2310.
Release 2310 does not contain any changes to TRILL over Release 2307.
Release 2307 contains the following changes to TRILL over Release 2210:

Configuration guide Added and modified features
TRILL
Added features:
•Fast switching the root of a TRILL distribution tree
•Configuring the system ID and nickname for an RB
•Configuring the link cost for a TRILL port
•Configuring the designated VLANs for exchanging TRILL frames
•Configuring the maximum length of an LSP originated by an RB
•Configuring the maximum length of an LSP that can be received by an RB
•Setting the Overload bit of LSPs and setting the lifetime for the set Overload bit
•Setting the SPF calculation interval for TRILL
•Configuring the maximum number of TRILL unicast equal-cost routes
•Configure SNMP for TRILL
•Displaying the TRILL unicast routing table for the specified RB
Conventions
This section describes the conventions used in this documentation set.
Command conventions
Convention Description
Boldface Bold text represents commands and keywords that you enter literally as shown.
Italic Italic text represents arguments that you replace with actual values.
[ ] Square brackets enclose syntax choices (keywords or arguments) that are optional.
{ x | y | ... }
Braces enclose a set of required syntax choices separated by vertical bars, from
which you select one.
[ x | y | ... ]
Square brackets enclose a set of optional syntax choices separated by vertical bars,
from which you select one or none.
{ x | y | ... } *
Asterisk marked braces enclose a set of required syntax choices separated by
vertical bars, from which you select at least one.
[ x | y | ... ] *
Asterisk marked square brackets enclose optional syntax choices separated by
vertical bars, from which you select one choice, multiple choices, or none.
&<1-n> The argument or keyword and argument combination before the ampersand (&)
sign can be entered 1 to n times.
# A line that starts with a pound (#) sign is comments.
GUI conventions
Convention Description
Boldface Window names, button names, field names, and menu items are in Boldface. For
example, the New User window appears; click OK.
> Multi-level menus are separated by angle brackets. For example, File > Create >
Folder.

Symbols
Convention Description
WARNING An alert that calls attention to important information that if not understood or
followed can result in personal injury.
CAUTION
An alert that calls attention to important information that if not understood or
followed can result in data loss, data corruption, or damage to hardware or
software.
IMPORTANT An alert that calls attention to essential information.
NOTE An alert that contains additional or supplementary information.
TIP An alert that provides helpful information.
Network topology icons
Represents a generic network device, such as a router, switch, or firewall.
Represents a routing-capable device, such as a router or Layer 3 switch.
Represents a generic switch, such as a Layer 2 or Layer 3 switch, or a router that
supports Layer 2 forwarding and other Layer 2 features.
Port numbering in examples
The port numbers in this document are for illustration only and might be unavailable on your switch.
About the H3C S5830V2 & S5820V2
documentation set
The H3C S5830V2 & S5820V2 documentation set includes:
Category Documents Purposes
Product description and
specifications Marketing brochures Describe product specifications and benefits.

Category Documents Purposes
Hardware specifications and
installation
Compliance and safety manual
Provides regulatory information and the
safety instructions that must be followed
during installation.
Installation quick start Provides basic installation instructions.
Installation guide
Provides a complete guide to hardware
installation and hardware
specifications.
H3C LSWM1HFANSC &
LSWM1HFANSCB Fan
Assemblies Installation
Provides the physical views,
specifications, installation procedures,
and removal procedures for
hot-swappable fan assemblies.
H3C LSVM1FANSC &
LSVM1FANSCB Fan Assemblies
Installation
Provides physical views, specifications,
installation procedures, and removal
procedures for hot-swappable fan
assemblies.
H3C SFP/SFP+/XFP
Transceiver Modules Installation
Guide
Describes the installation and
replacement procedures for
SFP/SFP+/XFP transceiver modules.
H3C LSVM1AC650 &
LSVM1DC650 Power Modules
User Manual
Provides the physical views,
specifications, installation procedures,
and removal procedures for the
LSVM1AC650 and LSVM1DC650
power modules.
H3C LSVM1AC300 &
LSVM1DC300 Power Modules
User Manual
Provides the physical views,
specifications, installation procedures,
and removal procedures for the
LSVM1AC300 and LSVM1DC300
power modules.
Software configuration
Configuration guides Describe software features and
configuration procedures.
Command references Provide a quick reference to all
available commands.
Operations and maintenance
MIB Companion Describes the MIBs for the software
release.
Release notes Provide information about the product
release and software upgrading.
Obtaining documentation
Access the most up-to-date H3C product documentation on the World Wide Web
at http://www.h3c.com.
Click the links on the top navigation bar to obtain different categories of product documentation:
[Technical Support & Documents > Technical Documents]—Provides hardware installation, software
upgrading, and software feature configuration and maintenance documentation.

[Products & Solutions]—Provides information about products and technologies, as well as solutions.
[Technical Support & Documents > Software Download]—Provides the documentation released with the
software version.
Technical support
servic[email protected]
http://www.h3c.com
Documentation feedback
You can e-mail your comments about product documentation to [e-mail].
We appreciate your comments.

i
Contents
Configuring TRILL·························································································································································· 1
Overview············································································································································································1
Basic concepts ··························································································································································1
TRILL frame formats···················································································································································1
How TRILL works·······················································································································································3
TRILL forwarding mechanisms ·································································································································3
Protocols and standards ··········································································································································5
Configuration restrictions and guidelines·······················································································································5
TRILL configuration task list···············································································································································6
Enabling TRILL····································································································································································6
Configuration restrictions and guidelines ··············································································································6
Configuration procedure ·········································································································································7
Configuring the system ID and nickname for an RB······································································································8
Configuring the link type of a TRILL port·························································································································8
Configuring the DRB priority of a TRILL port···················································································································9
Configuring the link cost for a TRILL port························································································································9
Configuring the announcing VLANs and designated VLAN ····················································································· 10
Configuring TRILL timers ················································································································································ 11
Adjusting LSP parameters·············································································································································· 11
Adjusting the SPF algorithm parameters······················································································································ 13
Configuring the TRILL unicast equal-cost routes··········································································································· 13
Configuring TRILL distribution trees ······························································································································ 14
Enabling logging of TRILL neighbor changes·············································································································· 15
Configuring SNMP for TRILL·········································································································································· 15
Configuring TRILL GR ····················································································································································· 16
Displaying and maintaining TRILL································································································································· 16
TRILL configuration example·········································································································································· 17
Network requirements··········································································································································· 17
Configuration procedure ······································································································································ 18
Verifying the configuration··································································································································· 20
Index ···········································································································································································22

1
Configuring TRILL
Transparent Interconnect of Lots of Links (TRILL) uses IS-IS to provide transparent Layer 2 forwarding.
TRILL requires a license. For information about feature licensing, see Fundamentals Configuration Guide.
Overview
TRILL combines the simplicity and flexibility of Layer 2 switching with the stability, scalability, and rapid
convergence capability of Layer 3 routing. All these advantages make TRILL very suitable for large flat
Layer 2 networks in data centers.
Basic concepts
•RBridge—Routing bridge (RB) that runs TRILL. RBs are classified into ingress RBs, transit RBs, and
egress RBs, depending on their positions in the TRILL network. A frame enters the TRILL network
through an ingress RB, travels along transit RBs, and leaves the TRILL network through an egress RB,
as shown in Figure 2.
•TRILL network—A Layer 2 network comprised of RBs, as shown in Figure 3.
•System ID—Unique identifier of an RB in the TRILL network. The system ID is 6-byte.
•Nickname—Address of an RB in the TRILL network. The nickname is 2-byte.
•Link State Database—The LSDB contains all link state information in the TRILL network.
•Link State Protocol Data Unit—An LSP describes local link state information and is advertised
between neighbor devices.
•Designated Routing Bridge (DRB)—Similar to the designated IS (DIS) in IS-IS, a DRB exists in the
broadcast network. It helps simplify network topology, and appoints AVFs and appointed ports for
the VLANs on each RB in the broadcast network.
•Appointed VLAN-x Forwarder (AVF) and appointed port—To avoid loops, TRILL requires all the
traffic of a VLAN on a broadcast network to enter and leave the TRILL network through the same
port of an RB. The RB is the AVF of the VLAN, and the port is the appointed port.
For more information about LSDB, LSPDU, and DIS, see Layer 3—IP Routing Configuration Guide.
TRILL frame formats
TRILL frames include control frames and data frames.
TRILL control frames include TRILL Hello, LSP, CSNP, PSNP, MTU-probe, and MTU-ack. These control
frames use 802.1Q encapsulation, and have a fixed destination multicast address 0180-C200-0041.
TRILL data frames have a specific format, as shown in Figure 1. A TRILL header and an outer Ethernet
header are added to the original Ethernet frame.

2
Figure 1 TRILL data frame format
Table 1 describes the fields in the TRILL header.
Table 1 TRILL header fields
Field Descri
p
tion
Ethertype The Ethertype is fixed to TRILL.
V Version number, which is 0. When an RB receives a TRILL frame, it checks the V
field and drops the frame if the Vfield is not 0.
R Reserved for future extension. An ingress RB sets the R field to 0when adding a
TRILL header. Transit RBs and egress RBs ignore the field.
M
Multi-destination attribute:
•0—Known unicast frame.
•1—Multicast, broadcast, or unknown unicast frame.
Op-Length Length of the Options field. 0indicates that the Options field does not exist.
Hop Count Hop count, which is used to avoid loops. An RB drops a TRILL frame whose hop
count is decremented to 0.
Egress RB Nickname Nickname of the egress RB.
Ingress RB Nickname Nickname of the ingress RB.
Options Options field. This field exists when the Op-Length field is non-zero.