Interface down 9300...

[Abiel Rodriguez · Accepted solution]

Hi Jonathan,

From the output you provided in the first post this doesn't appear to be a STP problem at all. It looks like a physical layer problem.

GigabitEthernet2/4 is down, line protocol is down

The line is down, down and is not receiving in packets.

I would try to isolate this problem before making all the STP changes. I would try the following to isolate the problem.

1. Plug 2/4 into a known working port
2. Switch 2/3 with 2/4 - Does the problem follow the port switch?
3. Try a different GBIC
4. Replace the fiber cable. Use a known good cable

Once the port is up, up it should move to forwarding.

The other STP changes are good. I would recommend 8.0.01e. More fixes included in this version.

If I misunderstood the initial question, let me know.

David

[Jonathan Axford]

Hi,

Problem is solved!

Have updated 9300 to 08.001c and recreated all of the trunks and route only interfaces.

Didn;t work, so, even though i had already replaced the GBICs with ones i though were working, i tried different ones again!

Turned out to be a faulty GBIC and the two i originally tried were also faulty. All sorted now, still would like to go through the STP config. Will get some notes together.

Many thanks for all your help...

[Mohieddin Kharnoub]

Great news,
anyway attach drawings and config and we will work it out togther.

Good Luck !!!