is up, line protocol is down - but nothing is plugged in

mzinzmzinz Member Posts: 328
I've got a 2801 sitting here.

When I 'sh int', both FastEth interfaces show "interface is up, line protocol is down".

The thing is, nothing is plugged into either one... Shouldn't they both be down/down due to physical issue?

Thanks.
_______LAB________
2x 2950
2x 3550
2x 2650XM
2x 3640
1x 2801

Comments

  • NetwurkNetwurk Member Posts: 1,155 ■■■■■□□□□□
    Yes, it should show as down, down

    Post your show run interface fa x/x output if you can
  • joshgibson82joshgibson82 Member Posts: 80 ■■□□□□□□□□
    mzinz wrote:
    I've got a 2801 sitting here.

    When I 'sh int', both FastEth interfaces show "interface is up, line protocol is down".

    The thing is, nothing is plugged into either one... Shouldn't they both be down/down due to physical issue?

    Thanks.

    No, the interface will show up/down if the interface does not have "shutdown" in its config.

    This is very common.
    Josh, CCNP CWNA
  • dynamikdynamik Banned Posts: 12,312 ■■■■■■■■■□
    I thought the interface would appear down if it wasn't physically connected as well. I'm just learning this now though, so maybe I'm mistaken (or there are exceptions I'm not aware of i.e. only applies to serial interfaces).
  • mzinzmzinz Member Posts: 328
    mzinz wrote:
    I've got a 2801 sitting here.

    When I 'sh int', both FastEth interfaces show "interface is up, line protocol is down".

    The thing is, nothing is plugged into either one... Shouldn't they both be down/down due to physical issue?

    Thanks.

    No, the interface will show up/down if the interface does not have "shutdown" in its config.

    This is very common.

    Please explain then. This does not make sense to me.
    _______LAB________
    2x 2950
    2x 3550
    2x 2650XM
    2x 3640
    1x 2801
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