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Router ID
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The device ID.
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Local AS Number
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The BGP4 AS number for the device.
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Confederation Identifier
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The AS number of the confederation in which the device resides.
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Confederation Peers
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The numbers of the local autonomous systems contained in the confederation. This
list matches the confederation peer list you configure on the device.
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Maximum Number of Paths Supported for Load Sharing
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The maximum number of route paths across which the device can balance traffic to
the same destination. The feature is enabled by default but the default number of
paths is 1. You can increase the number from 2 through 8 paths.
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Number of Neighbors Configured
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The number of BGP4 neighbors configured on this device, and currently in established
state.
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Number of Routes Installed
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The number of BGP4 routes in the device BGP4 route table and the route or path memory
usage.
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Number of Routes Advertising to All Neighbors
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The total of the RtSent and RtToSend columns for all neighbors, the total number
of unique ribout group entries, and the amount of memory used by these groups.
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Number of Attribute Entries Installed
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The number of BGP4 route-attribute entries in the device route-attributes table and
the amount of memory used by these entries.
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Neighbor Address
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The IP addresses of the BGP4 neighbors for this device.
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AS#
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The AS number.
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State
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The state of device sessions with each neighbor. The states are from this perspective
of the device, not the neighbor. State values are based on the BGP4 state machine
values described in RFC 1771 and can be one of the following for each device:
- IDLE - The BGP4 process is waiting to be started. Usually, enabling BGP4 or establishing
a neighbor session starts the BGP4 process. A minus sign (-) indicates that the session
has gone down and the software is clearing or removing routes.
- ADMND - The neighbor has been administratively shut down.
- CONNECT - BGP4 is waiting for the connection process for the TCP neighbor session
to be completed.
- ACTIVE - BGP4 is waiting for a TCP connection from the neighbor.
Note : If the state frequently changes between CONNECT and ACTIVE, there may be a problem
with the TCP connection.
- OPEN SENT - BGP4 is waiting for an Open message from the neighbor.
- OPEN CONFIRM - BGP4 has received an Open message from the neighbor and is now waiting
for either a KEEPALIVE or NOTIFICATION message. If the device receives a KEEPALIVE
message from the neighbor, the state changes to Established. If the message is a NOTIFICATION,
the state changes to Idle.
- ESTABLISHED - BGP4 is ready to exchange UPDATE packets with the neighbor.
Operational States:
Additional information regarding the
operational states of BGP described previously may be added as
described in the following:
-
(+) - is displayed if there is more BGP data in the TCP receiver queue.
Note : If you display information for the neighbor using the
show ip bgp neighborip-addr command, the TCP receiver queue value will be greater than 0.
- (>)
- indicates that there is more BGP data in the outgoing queue.
-
(-)
- indicates that the session has gone down and the software is clearing or removing
routes.
-
(*)
- indicates that the inbound or outbound policy is being updated for the peer.
- (c)
- indicates that the table entry is clearing.
- (p)
- indicates that the neighbor ribout group membership change is pending or in progress
-
(s)
- indicates that the peer has negotiated restart, and the session is in a stale state.
-
(r)
- indicates that the peer is restarting the BGP4 connection, through restart.
-
(^)
- on the standby MP indicates that the peer is in the ESTABLISHED state and has received
restart capability (in the primary MP).
-
(<)
- indicates that the device is waiting to receive the "End of RIB" message the peer.
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Time
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The time that has passed since the state last changed.
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Accepted
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The number of routes received from the neighbor that this device installed in the
BGP4 route table. Usually, this number is lower than the RoutesRcvd number. The difference
indicates that this device filtered out some of the routes received in the UPDATE
messages.
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Filtered
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The routes or prefixes that have been filtered out:
- If soft reconfiguration is enabled, this field shows how many routes were filtered
out (not placed in the BGP4 route table) but retained in memory.
- If soft reconfiguration is not enabled, this field shows the number of BGP4 routes
that have been filtered out.
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Sent
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The number of BGP4 routes the device has sent to the neighbor.
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ToSend
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The number of routes the device has queued to advertise and withdraw to a neighbor.
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