Alcatel-Lucent 7750 SR-OS, Configuration Manual

Page: 112 / 674

Router Global Commands
Page 112 7750 SR OS Router Configuration Guide
Context config>router
Description This command configures the autonomous system (AS) number for the router. A router can only
belong to one AS. An AS number is a globally unique number with an AS. This number is used to
exchange exterior routing information with neighboring ASs and as an identifier of the AS itself.
If the AS number is changed on a router with an active BGP instance, the new AS number is not used
until the BGP instance is restarted either by administratively disabling/enabling (
shutdown /
no shutdown ) the BGP instance or rebooting the system with the new configuration.
Default
No autonomous system number is defined.
Parameters
autonomous-system — The autonomous system number expressed as a decimal integer.
Values
1 — 4294967295
confederation
Syntax confederation confed-as-num members as-number [ as-number... up to 15 max]
no confederation [ confed-as-num members as-number... up to 15 max]
Context config>router
Description
This command creates confederation autonomous systems within an AS.
This technique is used to reduce the number of IBGP sessions required within an AS. Route
reflection is another technique that is commonly deployed to reduce the number of IBGP sessions.
The no form of the command deletes the specified member AS from the confederation.
When no members are specified in the no statement, the entire list is removed and confederation is
disabled.
When the last member of the list is removed, confederation is disabled.
Default
no confederation - no confederations are defined.
Parameters
confed-as-num — The confederation AS number expressed as a decimal integer.
Values
1 — 65535
members member-as-num — The AS number(s) of members that are part of the confederation,
expressed as a decimal integer. Up to 15 members per confed-as-num can be configured .
Values
1 — 65535
ecmp
Syntax ecmp max-ecmp-routes
no ecmp
Context config>router