Huawei Quidway NetEngine80E Configuration Manual page 875

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Figure 8-5 Networking diagram for path MTU auto discovery
RouterA
Pre-configuration Tasks
Before configuring path MTU auto discovery, complete the following task:
l
Data Preparation
To configure path MTU auto discovery, you need the following data.
No.
1
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
bgp { as-number-plain | as-number-dot }
The BGP view is displayed.
Step 3 Run:
peer { group-name | ipv4-address } path-mtu auto-discovery
Path MTU auto discovery is enabled.
By default, path MTU auto discovery is disabled.
After the command is run, a BGP peer learns the path MTU, preventing BGP messages to be
fragmented during transmission.
Step 4 Run:
quit
Return to the system view.
Issue 02 (2014-09-30)
MTU=1500 MTU=1496
RouterB
Configuring Basic BGP Functions
Data
(Optional) Aging time of the path MTU
NOTE
The transmit and receive paths between two BGP peers may be different. Therefore, running this command
on both ends is recommended. It makes both peers exchange messages based on the path MTU.
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MTU=1500
RouterC RouterD
8 BGP Configuration
850