Reference Guide

216 | Border Gateway Protocol IPv4 (BGPv4)
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Use any of the following commands in ROUTER BGP mode to add routes from other routing instances or
protocols.
Enable additional paths
By default, the add-path feature is disabled.
Use the following command in the CONFIGURATION ROUTER BGP mode to allow multiple paths sent
to peers.
Command Syntax Command Mode Purpose
redistribute {connected | static}
[route-map map-name]
ROUTER BGP or
CONF-ROUTER_BGPv6_
AF
Include, directly connected or
user-configured (static) routes in BGP.
Configure the following parameters:
•
map-name: name of a configured route
map.
redistribute isis [level-1 | level-1-2 |
level-2] [metric value] [route-map
map-name]
ROUTER BGP or
CONF-ROUTER_BGPv6_
AF
Include specific ISIS routes in BGP.
Configure the following parameters:
• level-1, level-1-2, or level-2: Assign
all redistributed routes to a level.
Default is
level-2.
• metric range: 0 to 16777215. Default is
0.
•
map-name: name of a configured route
map.
redistribute ospf process-id [match
external {1 | 2} | match internal]
[metric-type {external | internal}]
[route-map map-name]
ROUTER BGP or
CONF-ROUTER_BGPv6_
AF
Include specific OSPF routes in IS-IS.
Configure the following parameters:
• process-id range: 1 to 65535
• match external range: 1 or 2
• match internal
• metric-type: external or internal.
• map-name: name of a configured route
map.
Note: In some cases, while receiving 1K same routes from more than 64 iBGP neighbors, BGP sessions
holdtime of 10 seconds may flap. The BGP add-path does not update packets for advertisement and
cannot scale to higher numbers. Either reduce the number of routes added or increase the holddown
timer value.
Step Command Syntax Command Mode Purpose
1
bgp add-path [send |
receive | both]
count
CONFIG-ROUTER-BGP Allow the advertisement of multiple paths for the
same address prefix without the new paths
replacing any previous ones.
Range: 2-64