Troubleshooting Using Frame Relay Congestion Control

Now let’s say all your users are whining about the fact that their Frame Relay connection to the corporate site is super slow. Because you strongly suspect that the link is overloaded, you verify the Frame Relay congestion control information with the show frame-relay pvc command and get this:

RouterA#sh frame-relay pvc

PVC Statistics for interface Serial0/0 (Frame Relay DTE)

What you want to look for is the in BECN pkts 192 output because this is what’s telling the local router that traffic sent to the corporate site is experiencing congestion. BECN means that the path that a frame took to “return” to you is congested.