Brocade ICX 6650 Layer 3 Routing Configuration Guide 363
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Displaying BGP4 information
State The state of this router neighbor session with each neighbor. The states are from
this router perspective of the session, not the neighbor perspective. The state
values are based on the BGP4 state machine values described in RFC 1771 and
can be one of the following for each router:
•IDLE – The BGP4 process is waiting to be started. Usually, enabli ng 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. Refer to
“Administratively shutting down a session with a BGP4 neighbor” on
page302.
A minus sign (-) indicates that the session has gone down and the software is
clearing or removing routes.
•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
router 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.
If there is more BGP data in the TCP receiver queue, a plus sign (+) is also
displayed.
NOTE: If you display information for the neighbor using the show ip bgp neighbors
ip-addr command, the TCP receiver queue value will be greater than 0.
Operational States:
Additional information regarding the BGP operational states described above may
be added as follows:
• (+) – is displayed if there is more BGP4 data in the TCP receiver queue.
Note: If you display information for the neighbor using the show ip bgp
neighbors ip-addr command, the TCP receiver queue value will be greater
than 0.
• (-) – 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.
• (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).
• (<) – indica tes that the devic e is wait ing to re ceive the “End of R IB” mes sage
the peer.
Time The time that has passed since the state last changed.
Accepted The number of routes received from the neighbor that this router installed in the
BGP4 route table. Usually, this number is lower than the RoutesRcvd number.
The difference indicates that this router filtered out some of the routes received in
the UPDATE messages.
TABLE 64 BGP4 summary information (Continued)
Field Description