Users Guide

Version Description
8.3.8.0 Added the add-path option to the S4810. Output on the S4810
shows the ADDPATH parameters.
8.3.7.0 Introduced on the S4810.
7.8.1.0 Introduced on the S-Series.
7.7.1.0 Introduced on the C-Series.
7.5.1.0 Added the detail option. Output now displays the default MED
value.
7.2.1.0 Added the received and denied route options.
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 neighbor information that this command displays does not include counts
corresponding to ignored prefixes and updates. However, the martian case is an
exception where neighbor information corresponding to ignored updates is displayed.
BGP shows the exact information that is exchanged between the BGP peers. It also
indicates whether or not this information is received by the BGP peer.
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
Border Gateway Protocol 489