Border Gateway Protocol - CCIE Routing and Switching Exam Certification Guide - page 455

Example 9-17 show ip bgp neighbors Command (Continued)

Address family IPv4 Unicast: advertised and received
Received 3 messages, 0 notifications, 0 in queue
Sent 3 messages, 0 notifications, 0 in queue
Route refresh request: received 0, sent 0
Default minimum time between advertisement runs is 30 seconds

0 notifications
0 notifications

For address family: IPv4 Unicast
BGP table version 1, neighbor version 1
Index 1, Offset 0, Mask 0x2
0 accepted prefixes consume 0 bytes
Prefix advertised 0, suppressed 0, withdrawn 0
Number of NLRIs in the update sent: max 0, min 0 Number of NLRIs

Connections established 1; dropped 0
Last reset never
Connection state is ESTAB, I/O status: 1, unread input bytes: 0
Local host: 1.1.1.1, Local port: 11007
Foreign host: 1.1.1.2, Foreign port: 179

The command show ip bgp lists the networks in the BGP table, as shown in Example 9-18. The
next hop, metric, preference, weight, AS path, and origin attributes are listed in this command's
output. The status codes are on the left; origin codes are on the right.

Status codes are as follows:
•

s indicates suppressed routes; the route is suppressed when its penalty exceeds the limit.

•

d indicates dampened routes; the route has flapped so often that the router does not
advertise this route to BGP neighbors.

•

h indicates a history state; after a route flaps once, it is assigned a penalty and put into
history state, meaning the router does not have the best path, based on historical
information.

•

* indicates a valid route.

•

> indicates the best route.

•

i indicates an internal route.

Origin codes are as follows:
•

i indicates entry originated from an IGP advertised with the network command.

•

e indicates entry originated from EGP.

•

? indicates origin is unknown, usually from redistribution.