The 192.168.0.0 network is not being propagated throughout the network. Observe the BGP
configuration commands from the advertising router. What is the reason the 192.168.0.0
route is not being advertised?
router bgp 65111
neighbor 172.16.1.1 remote-as 65111
neighbor 172.16.2.1 remote-as 65112
network 192.168.0.0
network 10.0.0.0
!
ip route 192.168.0.0 255.255.0.0 null0
Select the best response.
A.
The network 192.168.0.0 statement is missing mask 255.255.0.0
B.
The network 192.168.0.0 statement is missing mask 0.0.255.255.
C.
The network 10.0.0.0 statement is missing mask 255.0.0.0.
D.
The network 10.0.0.0 statement is missing mask 0.255.255.255.
E.
The auto-summary configuration is missing.
For example, if the subnet in the routing table is 75.75.75.0 mask 255.255.255.0, and you configure network 75.0.0.0 under the router bgp command, and auto-summary is enabled, BGP introduces the classfull network 75.0.0.0 mask 255.0.0.0 in the BGP table.
If these three conditions are not all met, then BGP does not install any entry in the BGP table unless there is an exact match in the local routing table.
Note: If the AS that performs BGP does not own the complete classfull network, Cisco recommends that you issue the no auto-summary command under router bgp in order to disable auto-summary.
http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5816-bgpfaq-5816.html
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Best Regards!
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