3Com MSR 50, MSR 30 manual Summary automatic, Syntax summary automatic Undo summary automatic, 1011

1011

You can specify a router ID manually. If not, the system selects an IP address as the router ID. The selection sequence is the highest IP address among loopback interface addresses; if not available, then the highest IP address of interfaces. It is recommended to specify a loopback interface address as the router ID to enhance network reliability.

Only when the interface with the selected Router ID or the manual Router ID is deleted will the system select another ID for the router.

Examples # Specifies the Router ID as 10.18.4.221.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] router-id 10.18.4.221

summary automatic

Syntax summary automatic

undo summary automatic

View BGP view/BGP-VPN instance view

Parameters None

Description Use the summary automatic command to enable automatic summarization for redistributed subnets.

Use the undo summary automatic command to disable automatic summarization.

By default, automatic summarization is disabled.

Note that:

■Neither the default route nor the routes imported using the network command can be summarized automatically.

■With this feature enabled, BGP limits the subnets redistribution from IGP to reduce the size of routing table.

Examples # In BGP view, enable automatic summarization.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] summary automatic

#In BGP-VPN instance view, enable automatic summarization (the VPN has been created).

<Sysname> system-view

[Sysname] bgp 100