Cisco ICND2 – Troubleshoot WAN implementation issues

Somethings to look out for when troubleshooting WAN implementation issues:

  • Mismatched IPs
  • debug ppp authentication – Will show if any authentication issues (password mismatch)
  • Encapsulation mismatch – ppp and HDLC for example
  • show cdp neighbors detail
  • show frame-relay lmi
  • show frame-relay map
  • show frame-relay pvc
  • show running-config
  • show interface s0
  • Frame relay encapsulation mismatch
  • debug frame-relay lmi