HP 5500 Ei 5500 Si Switch Series Configuration Guide

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[Sysname] interface gigabitethernet 3/0/1 
[Sysname-GigabitEthernet3/0/1] port link-type trunk 
File system naming conventions 
On a standalone switch, you can use the name of storage device to access its file system. For more 
information about storage device naming conventions, see  Fundamentals Configuration Guide. 
On an IRF fabric, you can use the name of storage device to access the file system of the master. To 
access the file system of any other member switch, use the name in the 
slot...

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Configuration synchronization mechanism 
IRF uses a strict running-configuration synchronization mechanism so all chassis in an IRF fabric can work 
as a single node, and after the master fails, other members can operate normally. 
In an IRF fabric, all chassis get and run the running configuration of the master. Any configuration you 
have made is propagated to all members.  
When you execute the  save [ safely  ] [ backup | main ] [  force ] command or the  save file -url  all 
command, the system...

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Detection 
The MAD implementation of this switch series detects active IRF fabrics with the same Layer 3 global 
configuration by extending the LACP, BFD, or gratuitous ARP protocol.  
These MAD mechanisms identify each IRF fabric with a domain ID and an active ID (the member ID of 
the master). If multiple active IDs are detected in a  domain, MAD determines that an IRF collision or split 
has occurred.  
You can use at least one of these mechanisms in an IRF fabric, depending on your network...

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Figure 5 LACP MAD application scenario 
 
 
BFD MAD 
BFD MAD can work with or without intermediate devices. Figure 6 shows a typical BFD MAD application 
scenario. 
To use BFD MAD:  
•   Set up dedicated BFD MAD link between each pai r of IRF members or between each IRF member 
and the intermediate device. Do not use the BFD MAD links for any other purpose. 
•   Assign the ports connected by BFD MAD links to  the same VLAN, create a VLAN interface for the 
VLAN, and assign a MAD IP address to each...

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Figure 6 BFD MAD application scenario 
 
 
ARP MAD 
ARP MAD detects multi-active collisions by using extended gratuitous ARP packets that convey the IRF 
domain ID and the active ID.  
You can set up ARP MAD links between neighbor IRF member devices, or more commonly, between each 
IRF member device and an intermediate device (see  Figure 7)
.  I f  a n  i n t e r m e d i a t e  d e v i c e  i s  u s e d ,  yo u  m u s t  
also run the spanning tree feature between the IRF fabric and the intermediate...

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Figure 7 ARP MAD application scenario 
 
 
Each IRF member compares the domain ID and the active ID in incoming extended gratuitous ARP 
packets with its domain ID and active ID: 
•  If the domain IDs are different, the extended gratuitous ARP packet is from a different IRF fabric, and 
the device does not continue to proc ess the packet with the MAD mechanism. 
•   If the domain IDs are the same, the device compares the active IDs: 
{ If the active IDs are different, the IRF fabric has split. 
{ If...

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Configuring IRF 
Read the configuration restrictions and guidelines carefully when you connect and set up an IRF fabric.  
General restrictions and configuration guidelines 
This section describes the restrictions and configuration guidelines you must follow.  
Software requirements 
All IRF member switches must run the same system software image version.  
IRF physical port restrictions and cabling requirements 
Candidate IRF physical ports include 10-GE ports on ex pansion interface cards. To use...

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Other configuration guidelines 
•  Strictly follow the IRF fabric setup procedure described in  Setup and configuration task list to pla n 
the IRF fabric, identify IRF physical ports, connect IRF member switches, and configure basic 
settings.  
•   Assign each member a unique IRF member ID to make sure they can merge. You must reboot the 
members to validate the IRF member ID settings.  
•   Assign the highest member priority to the device you want to use as the master. 
•   Before removing an...

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Task Remarks 
5.  Binding physical ports to IRF ports  Required. 
Perform
 this task on each member 
switch. 
6.   Accessing the IRF fabric : 
{ Accessing the CLI of the master switch 
{ Accessing the CLI of a subordinate switch  Login to the masters CLI is 
required. You configure all 
member switches at the masters 
CLI.  
From the masters CLI, you can log 
in to any other member switchs 
CLI to execute a limited set of 
maintenance commands.  
7.
  Assigning an IRF domain ID to the IRF fabric  T...

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Assigning a member ID to each IRF member switch 
 
 CAUTION: 
In an IRF fabric, chan
ging IRF member IDs might cause undesirable configuration changes and even data
loss. Before you do that, back up the confi
guration and make sure you fully understand the impact on your
network. For example, all member switches in an IR F fabric are the same model. If you swapped the IDs
of any two members, their interfac e settings would also be swapped.  
 
By default, the member IDs of all switches are 1. To...