What does "PfxCt" mean in a BGP session?

[admin_2]

A "sh ip bgp sum" gives a session in a "PfxCt" state. The session does not come up but stays in this state. What does this mean?

[#2]

Idle (PfxCt) - for prefix count over limit

It means that you've probably configured a maximum number

of prefix and you've reached such maximum number.

[Vishnu Asok]

This may be due to a maximum prefix restriction set by your service provider.

Eg:

PE router config:

R7# sh run | s r b

router bgp 6501

no synchronization

bgp log-neighbor-changes

network 70.0.0.0

network 80.0.0.1 mask 255.255.255.255

neighbor 70.0.0.2 remote-as 6500

neighbor 70.0.0.2 soft-reconfiguration inbound

neighbor 70.0.0.2 maximum-prefix 15 restart 1

no auto-summary

Logs indicate:

*Jun  9 07:09:14.363: %BGP-3-MAXPFXEXCEED: Number of prefixes received from 70.0.0.2 (afi 0): 16 exceeds limit 15

Neighbor        V          AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd

70.0.0.2        4       6500      54      28        0    0    0 00:00:49 Idle (PfxCt)

a) You may reduce the number of prefixes advertised by using a distribute list or

b)Ask your provider to increase the limit.

Hope you find this helpful.