Advanced Configuration and Management Guide

 

Table 10.10: BGP4 Network Information (Continued)

 

 

 

This Field...

 

Displays...

 

 

 

Atomic

 

Whether network information in this route has been aggregated and

 

 

this aggregation has resulted in information loss.

 

 

Note: Information loss under these circumstances is a normal part of

 

 

BGP4 and does not indicate an error.

 

 

 

Aggregation ID

 

The router that originated this aggregator.

 

 

 

Aggregation AS

 

The AS in which the network information was aggregated. This value

 

 

applies only to aggregated routes and is otherwise 0.

 

 

 

Originator

 

The originator of the route in a route reflector environment.

 

 

 

Cluster List

 

The route-reflector clusters through which this route has passed.

 

 

 

Status

 

The route’s status, which can be one or more of the following:

 

 

• A – AGGREGATE. The route is an aggregate route for multiple

 

 

networks.

 

 

• B – BEST. BGP4 has determined that this is the optimal route to

 

 

the destination.

 

 

Note: If the “b” is shown in lowercase, the software was not able

 

 

to install the route in the IP route table.

 

 

• b – NOT-INSTALLED-BEST. The routes received from the

 

 

neighbor are the best BGP4 routes to their destinations, but were

 

 

nonetheless not installed in the IP route table because the routing

 

 

switch received better routes from other sources (such as OSPF,

 

 

RIP, or static IP routes).

 

 

• C – CONFED_EBGP. The route was learned from a neighbor in

 

 

the same confederation and AS, but in a different sub-AS within

 

 

the confederation.

 

 

• D – DAMPED. This route has been dampened (by the route

 

 

dampening feature), and is currently unusable.

 

 

• H – HISTORY. Route dampening is configured for this route, and

 

 

the route has a history of flapping and is unreachable now.

 

 

• I – INTERNAL. The route was learned through BGP4.

 

 

• L – LOCAL. The route originated on this routing switch.

 

 

• M – MULTIPATH. BGP4 load sharing is enabled and this route

 

 

was selected as one of the best ones to the destination. The best

 

 

route among the multiple paths also is marked with “B”.

 

 

Note: If the “m” is shown in lowercase, the software was not able

 

 

to install the route in the IP route table.

 

 

• S – SUPPRESSED. This route was suppressed during

 

 

aggregation and thus is not advertised to neighbors.

 

 

 

Learned From

 

The IP address of the neighbor from which the routing switch learned

 

 

the route.

 

 

 

Distance

 

The administrative distance of the route.

 

 

 

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