You are configuring BGP speakers RouterA and RouterB to authenticate one another. The following conditions exist: RouterA has an IP address of 192.168.5.3 RouterB has an IP address of 192.168.5.2 Both routers reside in AS 6550. Which of the following commands will result in successful authentication?

• 300-410 : All Parts

neighbor 192.168.5.2 password routera executed on RouterA
neighbor 192.168.5.3 password routera executed on RouterB

When setting the keys for authentication, the keys must match. The keys do not need to be the names of either router, and should be a combination of letters numbers and symbols. In this example, both keys are set to the value routera.

The following two command pairs are incorrect because the keys do not match:

neighbor 192.168.5.2 password routera executed on RouterA
neighbor 192.168.5.3 password routerb executed on RouterB

and

neighbor 192.168.5.2 password routerb executed on RouterA
neighbor 192.168.5.3 password routera executed on RouterB

If you executed the debug ip bgp command to perform troubleshooting with either of these configurations in place, the error message you would see would be as follows:

%TCP-6-BADAUTH: Invalid MD5 digest from 192.168.5.3 (12293) to 192.168.5.2 (179)

In the error message, the numbers in parentheses are the port numbers used for the attempted communication.

The single commands would be incorrect because the key has only been configured on one end:

neighbor 192.168.5.2 password routera executed on RouterA

and

neighbor 192.168.5.2 password routerb executed on RouterB

If you executed the debug ip bgp command to troubleshoot with either of these configurations in place, you would see the following message:

%TCP-6-BADAUTH: No MD5 digest from 192.168.5.3 (12293) to 192.168.5.2 (179)

Objective:
Layer 3 Technologies
Sub-Objective:
Describe, configure, and verify BGP peer relationships and authentication