Configuring BGP4

Peer Out of Memory Count for:

Receiving Update Messages:0, Accepting Routes(NLRI):0

Attributes:0, Outbound Routes(RIB-out):0

This display shows the following information.

Table 10.7: BGP4 Route Summary Information for a Neighbor

This Field...

Displays...

 

 

Routes Received

How many routes the routing switch has received from the neighbor

 

during the current BGP4 session.

 

• Accepted/Installed – Indicates how many of the received routes

 

the routing switch accepted and installed in the BGP4 route table.

 

• Filtered – Indicates how many of the received routes the routing

 

switch did not accept or install because they were denied by

 

filters on the routing switch.

 

 

Routes Selected as BEST Routes

The number of routes that the routing switch selected as the best

 

routes to their destinations.

 

 

BEST Routes not Installed in IP

The number of routes received from the neighbor that are the best

Forwarding Table

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).

 

 

Unreachable Routes

The number of routes received from the neighbor that are

 

unreachable because the routing switch does not have a valid RIP,

 

OSPF, or static route to the next hop.

 

 

History Routes

The number of routes that are down but are being retained for route

 

flap dampening purposes.

 

 

NLRIs Received in Update Message

The number of routes received in Network Layer Reachability (NLRI)

 

format in UPDATE messages.

 

• Withdraws – The number of withdrawn routes the routing switch

 

has received.

 

• Replacements – The number of replacement routes the routing

 

switch has received.

 

 

NLRIs Discarded due to

Indicates the number of times the routing switch discarded an NLRI

 

for the neighbor due to the following reasons:

 

• Maximum Prefix Limit – The routing switch’s configured

 

maximum prefix amount had been reached.

 

• AS Loop – An AS loop occurred. An AS loop occurs when the

 

BGP4 AS-path attribute contains the local AS number.

 

• Invalid Nexthop – The next hop value was not acceptable.

 

• Duplicated Originator_ID – The originator ID was the same as the

 

local router ID.

 

• Cluster_ID – The cluster list contained the local cluster ID, or

 

contained the local router ID (see above) if the cluster ID is not

 

configured.

 

 

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