Brocade Virtual ADX Switch and Router Guide (Supporting ADX v03.1.00) - Manual (Page 240)

226 Brocade Virtual ADX Switch and Router Guide
53-1003246-01
Configuring BGP4 multipath load sharing
8
To enable load sharing of EBGP paths only, enter the following command at the BGP4 configuration
level of the CLI.
Virtual ADX(config-bgp-router)# multipath ebgp
To enable load sharing of paths from different neighboring ASs, enter the following command at the
BGP4 configuration level of the CLI.
Virtual ADX(config-bgp-router)# multipath multi-as
Syntax: [no] multipath ebgp | ibgp | multi-as
The ebgp | ibgp | multi-as parameter specifies the change you are making to load sharing:
• ebgp – Load sharing applies only to EBGP paths. Load sharing is disabled for IBGP paths.
• ibgp – Load sharing applies only to IBGP paths. Load sharing is disabled for EBGP paths.
• multi-as – Load sharing is enabled for paths from different ASs.
By default, load sharing applies to EBGP and IBGP paths, and does not apply to paths from
different neighboring ASs.
Enhancements to BGP4 load sharing
Enhancements to BGP4 Load Sharing allows support for load sharing of BGP4 routes in IP ECMP
even if the BGP4 multipath load sharing feature is not enabled through the use-load-sharing option
to the maximum-paths command. Using the following commands, you can also set separate values
for IGMP and EGMP multipath load sharing.
To set the number of equal-cost multipath IBGP routes or paths that will be selected, enter
commands such as the following.
Virtual ADX(config)# router bgp
Virtual ADX(config-bgp-router)# maximum-paths ibgp
Syntax: [no] maximum-paths ibgp num
The num variable specifies the number of equal-cost multipath IBGP routes that will be selected.
Possible values are 1 - 8. If the value is set to 1, BGP4 level equal-cost multipath is disabled for
IBGP routes.
To set the number of equal-cost multipath EBGP routes or paths that will be selected, enter
commands such as the following.
Virtual ADX(config)# router bgp
Virtual ADX(config-bgp-router)# maximum-paths ebgp
Syntax: [no] maximum-paths ebgp num
The num variable specifies the number of equal-cost multipath EBGP routes that will be selected.
Possible values are 1 - 8. If the value is set to 1, BGP4 level equal-cost multipath is disabled for
EBGP routes.