H3C S6300 Series Manuale utente

H3C S6300 Switch Series

TRILL Configuration Guide

Hangzhou H3C Technologies Co., Ltd.

http://www.h3c.com

Software version: Release 2418P01

Document version: 6W100-20150717

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.

Trademarks

H3C, , H3CS, H3CIE, H3CNE, Aolynk, , H3Care, , IRF, NetPilot, Netflow,

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 TRILL Configuration Guide describes the background, fundamentals, and configuration of TRILL.

This preface includes:

•Audience

•Conventions

•About the H3C S6300 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 S6300 series

Conventions

This section describes the conventions used in this documentation set.

Command conventions

Convention Descri

tion

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.

Convention Descri

tion

&<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 Descri

tion

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 Descri

tion

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.

Represents an access controller, a unified wired-WLAN module, or the access controller

engine on a unified wired-WLAN switch.

Represents an access point.

Represents a mesh access point.

Represents omnidirectional signals.

Represents directional signals.



Represents a security product, such as a firewall, UTM, multiservice security gateway, or

load-balancing device.

Represents a security card, such as a firewall, load-balancing, NetStream, SSL VPN, IPS,

or ACG card.

Port numbering in examples

The port numbers in this document are for illustration only and might be unavailable on your device.

About the H3C S6300 documentation set

The H3C S6300 documentation set includes:

Cate

Documents

Pur

oses

Hardware

specifications and

installation

Compliance and safety manual

CE DOC

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.

Fan assemblies installation

manual

Describes the appearance, specifications, and

installation and removal of hot-swappable fan

assemblies.

Power modules user manual

Describes the appearance, specifications, and

installation and removal of hot-swappable power

modules.

Pluggable transceiver modules

installation guide

Guides you through installing SFP/SFP+/QSFP+

transceiver modules.

Pluggable modules manual

Describes the hot-swappable modules available for

the H3C switches, their external views, and

specifications.

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,

including the version history, hardware and

software compatibility matrix, version upgrade

information, technical support information, 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 info@h3c.com.

We appreciate your comments.

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····································································································································································7

Configuration restrictions and guidelines ··············································································································7

Configuration procedure ·········································································································································8

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

Setting the link cost for a TRILL port·································································································································9

Configuring announcing VLANs and the designated VLAN ····················································································· 10

Configuring TRILL timers ················································································································································ 11

Configuring TRILL LSP parameters and features·········································································································· 12

Setting TRILL LSP parameters ································································································································ 12

Enabling TRILL LSP fast advertisement ················································································································· 13

Enabling TRILL pseudonode bypass····················································································································· 14

Setting the SPF algorithm parameters ·························································································································· 14

Configuring TRILL distribution trees ······························································································································ 15

Setting basic distribution tree parameters ·········································································································· 15

Enabling TRILL distribution tree multithread calculation····················································································· 15

Enabling load balancing over TRILL distribution trees ······················································································· 16

Configuring TRILL ECMP routes····································································································································· 16

Enabling incremental flush for TRILL multicast routing entries···················································································· 17

Enabling logging of TRILL neighbor changes·············································································································· 17

Configuring SNMP for TRILL·········································································································································· 18

Enabling TRILL to forward traffic from EVB S-channels······························································································· 18

Configuring TRILL GR ····················································································································································· 19

Associating a TRILL port with a track entry·················································································································· 19

Displaying and maintaining TRILL································································································································· 20

TRILL configuration example·········································································································································· 21

Network requirements··········································································································································· 21

Verifying the configuration··································································································································· 24

Index ···········································································································································································26

Configuring TRILL

TRansparent Interconnection 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 a

broadcast network. It helps simplify network topology, and assigns 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 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 VLAN's AVF, and the port is the VLAN's appointed port.

For more information about LSDB, LSPDU, and DIS, see Layer 3—IP Routing Configuration Guide.

TRILL frame formats

TRILL frames include protocol frames and data frames.

TRILL protocol frames include TRILL Hello, LSP, CSNP, PSNP, MTU-probe, and MTU-ack. These protocol

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.

Figure 1 TRILL data frame format

Table 1 describes the fields in the TRILL header.

Table 1 TRILL header fields

Field Descri

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.

Multidestination attribute:

•0—Known unicast frame.

•1—Multidestination frame (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.

How TRILL works

TRILL establishes and maintains adjacencies between RBs by periodically advertising Hello frames,

distributes LSPs among RB neighbors, and generates an LSDB for all RBs in the network. Based on the

LSDB, each RB uses the SPF algorithm to calculate forwarding entries destined to other RBs.

TRILL forwarding mechanisms

Different types of frames are forwarded by using different forwarding mechanisms. The following

sections describe these mechanisms.

Unicast frame forwarding mechanism

As shown in Figure 2, a unicast frame is forwarded as follows:

1. When a unicast frame enters the TRILL network, the ingress RB encapsulates the original Ethernet

frame with the following headers:

2. A TRILL header (similar to an IP header).

3. An outer Ethernet header (similar to the Ethernet header of a regular Ethernet frame).

4. RBs forward the frame hop by hop according to the egress RB nickname in the TRILL header in the

same way routers forward IP packets. Each hop replaces the outer Ethernet header with an

appropriate outer Ethernet header, and decrements the hop count in the TRILL header.

5. Upon receiving the TRILL frame, the egress RB de-encapsulates it to obtain the original Ethernet

frame, and sends the frame to the target device.

Figure 2 Unicast frame forwarding flow

The outer Ethernet header enables traditional Ethernet switches to forward TRILL frames and connect RBs.

Multidestination frame forwarding mechanism

In a TRILL network, RBs perform the following operations:

VLAN 10 VLAN 200 VLAN 300 VLAN 10

Ingress RB

RB 1

S1 S2

Ethernet frame TRILL frame TRILL frame Ethernet frame

Egress RB

RB 3

Transit RB

RB 2

Ingress RB = RB 1

Outer VLAN = 200

Egress RB = RB 3

Outer S-MAC = RB 1

Outer D-MAC = RB 2

Payload

Inner VLAN = 10

Inner S-MAC = S1

Inner D-MAC = S2

Ingress RB = RB 1

Outer VLAN = 300

Egress RB = RB 3

Outer S-MAC = RB 2

Outer D-MAC = RB 3

Payload

Inner VLAN = 10

Inner S-MAC = S1

Inner D-MAC = S2

Payload

Inner VLAN = 10

Inner S-MAC = S1

Inner D-MAC = S2

Payload

Inner VLAN = 10

Inner S-MAC = S1

Inner D-MAC = S2

Unicast frame

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