To configure router Chicago:
host4(config)#router bgp 200
host4(config-router)#neighbor 3.3.3.1 remote-as 100
To configure router LA:
host5(config)#router bgp 300
host5(config-router)#neighbor 1.1.1.1 remote-as 100
host5(config-router)#network 192.56.0.0
synchronization
■ Use to enable and disable synchronization between BGP and an IGP.
■ Synchronization is enabled by default. However, creating an address family for
a VRF automatically disables synchronization for that address family.
■ This command takes effect immediately.
■ Use the no version to advertise a route without waiting for the IGP to learn a
route to the prefix.
■ See synchronization.
Setting the Administrative Distance for a Route
The administrative distance is an integer in the range 0–255 that is associated with
each route known to a router. The distance represents how reliable the source of the
route is considered to be. A lower value is preferred over a higher value. An
administrative distance of 255 indicates no confidence in the source; routes with
this distance are not installed in the routing table. As shown in Table 21 on page 136,
default distances are provided for each type of source from which a route can be
learned.
Table 21: Default Administrative Distances for Route Sources
Default DistanceRoute Source
0Connected interface
1Static route
20External BGP
110OSPF
115IS-IS
120RIP
200Internal BGP
255Unknown
136 ■ Interactions Between BGP and IGPs
JUNOSe 11.1.x BGP and MPLS Configuration Guide
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