×

Warning message

  • Cisco Support Forums is in Read Only mode while the site is being migrated.
  • Cisco Support Forums is in Read Only mode while the site is being migrated.

Serial connection problems, including interface and line protocol status, output drops, input drops, input errors, interface resets, and carrier transitions

Document

Wed, 11/18/2009 - 18:25
Jun 22nd, 2009
User Badges:
  • Gold, 750 points or more

Core Issue

These are some of the reasons these issues occur:

  • Clocking problems
  • Faulty cabling 
  • A TELCO line is down.
  • Keepalives are not sent by a remote router. 
  • Noisy line


Resolution

For a workaround, perform these steps:

  1. Issue the Router # sh interfaces serial < ID > command in EXEC mode.
  2. From the output, check the first line. This gives the interface status.

For additional information, refer to table 15-1 in the Serial Lines: show interfaces serial Status Line Conditions section of Troubleshooting Serial Line Problems.

Loading.

Actions

This Document

Related Content