Reference Guide

Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.8.0 Added the add-path option to the S4810. Output on the S4810
shows the ADDPATH parameters.
Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Introduced on the S-Series.
Version 7.7.1.0 Introduced on the C-Series.
Version 7.5.1.0 Added the detail option. Output now displays the default MED
value.
Version 7.2.1.0 Added the received and denied route options.
Version 6.3.10 The output is changed to display the total number of advertised
prefixes.
Usage
Information
After a peer reset, the contents of the notification log messages is displayed in hex values for
debugging.
The following describes the show ip bgp neighbors command shown in the following
examples.
The Lines Beginning
with:
Description
BGP neighbor Displays the BGP neighbor address and its AS number. The last
phrase in the line indicates whether the link between the BGP router
and its neighbor is an external or internal one. If they are located in
the same AS, the link is internal; otherwise the link is external.
BGP version Displays the BGP version (always version 4) and the remote router
ID.
BGP state Displays the neighbor’s BGP state and the amount of time in
hours:minutes:seconds it has been in that state.
Last read This line displays the following information:
• last read is the time (hours:minutes:seconds) the router read
a message from its neighbor
• hold time is the number of seconds configured between
messages from its neighbor
• keepalive interval is the number of seconds between
keepalive messages to help ensure that the TCP session is
still alive.
Received messages This line displays the number of BGP messages received, the
number of notifications (error messages), and the number of
messages waiting in a queue for processing.
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