Dell BigIron RX Series, Configuration Manual

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826 BigIron RX Series Configuration Guide
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Displaying BGP4 information
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Number of Attribute Entries Installed The number of BGP4 route-attribute entries in the router’s
route-attributes table. To display the route-attribute table, refer to
“Displaying BGP4 route-attribute entries” on page 847.
Neighbor Address The IP addresses of this router’s BGP4 neighbors.
AS# The AS number.
State The state of this router’s neighbor session with each neighbor. The
states are from this router’s perspective of the session, not the
neighbor’s 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, 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. Refer
to
“Administratively shutting down a session with a BGP4 neighbor”
on page 781.
•
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.
NOTE: ACTIVE – BGP4 is waiting for a TCP connection from the
neighbor.
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.
NOTE: If there is more BGP data in the TCP receiver queue, a plus sign
(+) is also displayed.
If you display information for the neighbor using the show ip bgp
neighbor
<ip-addr> command, the TCP receiver queue value will
be greater than 0.
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.
Filtered 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.
TABLE 124 BGP4 summary information (Continued)
This field... Displays...