Configuration Guide User guide

824 BigIron RX Series Configuration Guide
53-1002484-04
Configuring BGP4
27
When parameter changes take effect
Some parameter changes take effect immediately while others do not take full effect until the
router’s sessions with its neighbors are reset.
Immediately
The following parameter changes take effect immediately:
• Enable or disable BGP.
• Set or change the local AS.
• Add neighbors.
• Change the update timer for route changes.
• Disable or enable fast external fallover.
• Specify individual networks that can be advertised.
• Change the default local preference, default information originate setting, or administrative
distance.
• Enable or disable use of a default route to resolve a BGP4 next-hop route.
• Enable or disable MED (metric) comparison.
• Require the first AS in an Update from an EBGP neighbor to be the neighbor’s AS.
• Change MED comparison parameters.
• Disable comparison of the AS-Path length.
• Enable comparison of the router ID.
neighbor x x x x “Configuring BGP4 neighbors” on page 846
“Configuring a BGP4 peer group” on
page 854
network x x x “Specifying a list of networks to advertise” on
page 857
next-hop-enable-default x x “Using the IP default route as a valid next hop
for a BGP4 route” on page 858
next-hop-recursion x “Enabling next-hop recursion” on page 858
redistribute x x x “Modifying redistribution parameters” on
page 861
show x x x x “Displaying BGP4 information” on page 900
table-map x x x “Using a table map to set the tag value” on
page 864
timers x “Changing the keep alive time and hold time”
on page 865
update-time x x “Changing the BGP4 next-hop update timer”
on page 865
TABLE 133 IPv4 and IPv6 BGP Commands at Different Configuration Levels (Continued)
Command Global
(iPv4 and
IPv6)
IPv4 Address
Family
Unicast
IPv4 Address
Family
Multicast
IPv6 Address
Family
Unicast
See