Troubleshoot and resolve WAN implementation issues
Today wraps up your review of WAN technologies with some tips for troubleshooting WAN implementations.
Troubleshooting your overall WAN implementation (not just Frame Relay aspects) often starts with investigating the state of the local router’s serial interface. The show interfaces serial command in Example 3-1 has the default HDLC encapsulation.
R1# show interface serial 0/0/0Serial0/0/0 ...