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7450 ESS OS Router Configuration Guide
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
Description
This command enables ECMP and configures the number of routes for path sharing; for example, the
value 2 means two equal cost routes will be used for cost sharing.
ECMP can only be used for routes learned with the same preference and same protocol. See the
discussion on preferences in the
command.
When more ECMP routes are available at the best preference than configured in
max-ecmp-routes,
then the lowest next-hop IP address algorithm is used to select the number of routes configured in
max-ecmp-routes
.
The
no
form of the command disables ECMP path sharing. If ECMP is disabled and multiple routes
are available at the best preference and equal cost, then the route with the lowest next-hop IP address
is used.
Default
no ecmp
Parameters
max-ecmp-routes —
The maximum number of equal cost routes allowed on this routing table
instance, expressed as a decimal integer. Setting ECMP
max-ecmp-routes
to 1 yields the same
result as entering
no ecmp
.
Values
0 — 32
Summary of Contents for 7450 ESS Series
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