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BGP and BGP4+ Commands
Software Reference Supplement for SwitchBlade® x8112, x908, x900 and x610 Series Switches
C613-50032-01 REV D AlliedWare Plus
TM
Operating System - Software Version 5.4.3-2.6 3.249
synchronization (BGP and BGP4+)
Use this command in Router Configuration mode or in Address Family Configuration
mode to ensure BGP does not advertise router learned from iBGP peers until they are
learned locally, or are propagated throughout the AS via an IGP.
Use the no variant of this command to disable this function.
Syntax synchronization
no synchronization
Default
Disabled.
Mode Router Configuration and Address Family Configuration mode
Usage Synchronization is used when a BGP router should not advertise routes learned from iBGP
neighbors, unless those routes are also present in an IGP (for example, OSPF). These routes
must be in the RIB (Routing Information Base) learned locally or via an IGP.
Synchronization may be enabled when all the routers in an autonomous system do not
speak BGP, and the autonomous system is a transit for other autonomous systems.
Use the no synchronization command when BGP router can advertise routes learned
from iBGP neighbors, without waiting for IGP reachability, when routes are in the RIB.
Example The following example enables IGP synchronization of iBGP routes in Router
Configuration mode:
The following example enables IGP synchronization of iBGP routes in IPv4 unicast Address
Family Configuration mode:
The following example enables IGP synchronization of iBGP routes in the IPv6 unicast
Address Family Configuration mode:
awplus#
configure terminal
awplus(config)#
router bgp 11
awplus(config-router)#
synchronization
awplus#
configure terminal
awplus(config)#
router bgp 11
awplus(config)#
address-family ipv4 unicast
awplus(config-af)#
synchronization
awplus#
configure terminal
awplus(config)#
router bgp 11
awplus(config)#
address-family ipv6 unicast
awplus(config-af)#
synchronization