GigabitEthernet down/down

networking cisco router interface

Solution 1

Issue the shutdown first, then issue the "no keepalive" command, then bring the interface back up. It should show up/up at this point and hold that state indefinitely (for a GE, anyhow). Turning keepalive tracking off while the interface has already marked itself down isn't going to bring it up.

Solution 2

So the interface is down and the line protocol is down.

Is the interface administratively down? Use the no shutdown config command to enable the interface. (Also make sure a good cable it plugged in)

Michael S

Updated on September 18, 2022

Comments

Michael S 3 months

I have a huge amount of data that I need to process to allow for a data analysis. Currently, the data is in , and my goal is to use VBA to produce .

Any ideas?
- Dan over 10 years
  
  Is the port shutdown?
- HopelessN00b over 10 years
  
  Wait, does "nothing connected to the interface" mean that there's no cable in the port? If so, that's why. Plug something in to it and see if that doesn't change the status.
- Bulki over 10 years
  
  Agreed, by plugging something in, the status goes to "up up". But when testing on 2 locations, it's preferable to do this remotely. A "no keepalive" should tell the router that no keepalive packets are needed to give an "up" status.
- Sirch over 10 years
  
  How do you hope to get an initial 'up' without plugging it in?
- kralyk over 10 years
  
  What model? I'm pretty sure their switches and most of their routers don't bring it "UP" anymore with the no keepalive option like they used to.
- Bulki over 10 years
  
  Cisco router 1921
- Bulki over 10 years
  
  I've found a link with the same problem mentioned, no answers doh: supportforums.cisco.com/thread/2130479
- Bulki over 10 years
  
  A Cisco Router 1921, apparently Cisco implemented it this way in these routers. The only solution is to use loopbacks instead.
- Clusks about 6 years
  
  Hi, Michael S, are you able to show us what you've tried so far in VBA or what exactly you're having a problem with?
- Jean-Pierre Oosthuizen about 6 years
  
  Why not just use filters. Highlight the first row and then in the Excel Data tab select filter
Bulki over 10 years

No shut and no keepalive have been done on the interface. (otherwise it would say "administratively down" indeed)
Sirch over 10 years

Then I'd seriously consider hardware/cable failure.
Bulki over 10 years

I've tested further by connecting a device to the router. This time it says "up up" (is normal behavior), nothing wrong with the hardware.
user3789902 over 10 years

so, if you get up up, then what's the problem?
Bulki over 10 years

The problem is that I can not test the connectivity without having a physical connection. This is possible with the "no keepalive" command normally, but in this case it didn't work, status remains on "down down".
Bulki over 10 years

using the no shutdown and no keepalive after still gives a "down down" result.
rnxrx over 10 years

This should work - I even verified it on a 7200 I had lying around. What model of router is in use and can you post a (sanitized) copy of the interface's config stanza?
Bulki over 10 years

A Cisco Router 1921, apparently Cisco implemented it this way in these routers. The only solution is to use loopbacks instead.
Michael S about 6 years

Thanks so much! I'll try this out first thing in the morning. Best wishes.