Trouble Ticket 8-4
Problem: According to traffic statistics, all traffic for VLAN 20 is flowing through SW1 to reach the core instead of SW2.
You start by verifying the problem from PC1 on VLAN 20. In this case, the best tool is traceroute because it will identify the router hops (real IPs) along the path. All you care about is the first hop; is it 10.1.1.65 or 10.1.1.66? This will identify whether traffic is flowing though SW1 or SW2 to reach the core. Example 8-45 indicates that SW1 should be the VRRP virtual router master for the 10.1.1.64/26 network, because it was the first hop returned for the tracert command.
Example 8-45 A Trace from PC1 Confirming That SW1 Is the First Hop (Master)
C:\PC1>tracert 192.0.2.1 ...
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