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Sunday, October 24, 2010

Troubleshooting 4

The routing table on R3 should be able to reach 192.168.1.0/24 through 192.168.2.2 and not through 192.168.3.5.

Restrictions: You cannot modify administrative distance or do any type of filtering. The network192.168.1.0/24 must be advertised on R2 in both OSPF and BGP. You must ensure that R2 and R3 are not sending OSPF advertisements to R5. R5 can only use BGP as its routing protocol and must advertise its loopback.


2 comments:

Anonymous said...

My first option would be to use the "network 192.168.1.0 backdoor" BGP command on R3.

My second option could be to enable BGP between R2 and R3 (on 192.168.2.x/24 net).

Packets Analyzed said...

Thats right!

R3
__

router bgp 300
network 192.168.1.0 mask 255.255.255.0 backdoor

Your second option would have worked since I did not specifically restrict creating an EBGP relationship between R2 and R3. (although I tried to indicate such in the drawing :) )

Good stuff!

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