synchronization
Use this command to enable IGP synchronization of Internal BGP (iBGP) learned routes with the Internal Gateway Protocol (IGP) system in the router configuration mode or in the address-family configuration mode.
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). 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.
The no synchronization command is used when BGP router can advertise routes learned from its iBGP neighbors without waiting for the IGP reachability to be present.
Command Syntax
synchronization
no synchronization
Parameters
None
Default
No default value is specified
Command Mode
Address Family modes
Applicability
This command was introduced before OcNOS version 1.3.
Examples
The following example enables IGP synchronization of iBGP routes in Router mode.
#configure terminal
(config)#router bgp 11
(config-router)#address-family ipv4 unicast
(config-router-af)#synchronization
The following example enables IGP synchronization of iBGP routes in the IPv6-Unicast address family.
#configure terminal
(config)#router bgp 11
(config-router)#address-family ipv6 unicast
(config-router-af)#synchronization
Last modified date: 07-13-2023