Trunk-downs between Cat-switches in constant intervalls

aneumann · ‎02-03-2003

Hi,

There is a Fast-Ethernet fiber-multimode-trunk between a Cat6509 and a Cat5000.

It worked perfectly for years. Now there are messages on the Cat5000:

2003 Feb 03 08:09:07 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 08:10:12 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 08:15:23 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 08:15:57 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 08:21:07 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 08:22:12 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 08:27:20 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 08:27:55 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 08:33:02 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 08:33:38 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 08:38:47 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 08:39:22 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 08:44:30 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 08:45:05 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 08:50:14 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 08:50:50 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 08:55:59 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 08:56:35 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 09:01:45 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 09:02:50 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 09:08:01 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 09:08:35 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 09:13:44 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 09:14:19 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

2003 Feb 03 09:19:27 MET +01:00 %DTP-5-NONTRUNKPORTON:Port 1/2 has become non-trunk

2003 Feb 03 09:20:03 MET +01:00 %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk

Remarkable is, that the time-intervall between downs is nearly always 5min40sec.

The Cat6509 shows no messages and the port is always in "connected,trunking" status.

System-Info Cat6509:

EBISW3> (enable) sh mod

Mod Slot Ports Module-Type Model Sub Status

--- ---- ----- ------------------------- ------------------- --- --------

1 1 2 1000BaseX Supervisor WS-X6K-SUP1A-2GE yes ok

15 1 1 Multilayer Switch Feature WS-F6K-MSFC2 no ok

3 3 16 1000BaseX Ethernet WS-X6416-GBIC no ok

4 4 24 100BaseFX MM Ethernet WS-X6324-100FX-MM no ok

5 5 24 100BaseFX MM Ethernet WS-X6324-100FX-MM no ok

6 6 48 10/100BaseTX Ethernet WS-X6248A-TEL no ok

7 7 48 10/100BaseTX Ethernet WS-X6248A-TEL no ok

8 8 48 10/100BaseTX Ethernet WS-X6248A-TEL no ok

9 9 48 10/100BaseTX Ethernet WS-X6248A-TEL no ok

Mod Module-Name Serial-Num

--- ------------------- -----------

1 SAD04440LJ6

15 SAD04430JBY

3 SAL0539C4BT

4 SAD04320F30

5 SAD044106C1

6 SAL05084BGU

7 SAD043601ZX

8 SAD04340HRC

9 SAD044401J2

Mod MAC-Address(es) Hw Fw Sw

--- -------------------------------------- ------ ---------- -----------------

1 00-02-7e-25-3f-7e to 00-02-7e-25-3f-7f 7.0 5.3(1) 5.5(14)

00-02-7e-25-3f-7c to 00-02-7e-25-3f-7d

00-d0-02-fd-6c-00 to 00-d0-02-fd-6f-ff

15 00-04-4d-1a-73-c0 to 00-04-4d-1a-73-ff 1.1 12.1(4)E1 12.1(4)E1

3 00-05-9a-8f-e9-28 to 00-05-9a-8f-e9-37 1.0 5.4(2) 5.5(14)

4 00-d0-d3-2c-1d-d8 to 00-d0-d3-2c-1d-ef 1.1 5.4(2) 5.5(14)

5 00-d0-d3-3e-40-bc to 00-d0-d3-3e-40-d3 1.1 5.4(2) 5.5(14)

6 00-02-7e-c1-b7-64 to 00-02-7e-c1-b7-93 2.0 5.4(2) 5.5(14)

7 00-01-c9-68-23-10 to 00-01-c9-68-23-3f 1.0 5.4(2) 5.5(14)

8 00-30-19-df-69-d4 to 00-30-19-df-6a-03 1.0 5.4(2) 5.5(14)

9 00-01-97-2b-36-dc to 00-01-97-2b-37-0b 2.0 5.4(2) 5.5(14)

Mod Sub-Type Sub-Model Sub-Serial Sub-Hw

--- ----------------------- ------------------- ----------- ------

1 L3 Switching Engine WS-F6K-PFC SAD04440305 1.1

EBISW3> (enable)

System-Info Cat5000:

EBISW12> sh mod

Mod Module-Name Ports Module-Type Model Serial-Num Status

--- ------------------- ----- --------------------- --------- --------- -------

1 2 100BaseFX MM Supervis WS-X5006 005179001 ok

4 48 10BaseT Ethernet WS-X5012 006891871 ok

5 48 10BaseT Ethernet WS-X5012 006570776 ok

Mod MAC-Address(es) Hw Fw Sw

--- -------------------------------------- ------ ---------- -----------------

1 00-e0-f9-f5-e0-00 to 00-e0-f9-f5-e3-ff 1.9 2.2(2) 4.5(13a)

4 00-e0-1e-db-f0-10 to 00-e0-1e-db-f0-3f 2.1 2.3(2) 4.5(13a)

5 00-e0-1e-76-5c-00 to 00-e0-1e-76-5c-2f 2.0 2.3(2) 4.5(13a)

EBISW12>

I appreciate, as always, your help

Alfred Neumann

efrahim · ‎02-03-2003

Please check if you are getting any error on the ports and the port configuration.

Please put sh trunk n sh port / from both switches.

Thanks

Erum

aneumann · ‎02-04-2003

At the moment we have disabled the trunk in error; we are using port 1/1 instead of 1/2 on the cat5000. And the uplink is not connected to a cat6509 but to a cat5500, which works fine. This evening we'll go back to the old uplink.

The counters were cleared, but I looked the counters mentioned when we had the problem. Everything looked fine except:

The port 1/2 of the cat5000, which noted trunk down, had a lot of In-Discards (sho mac). I understand that, because the uplink-port of the cat6509 had still the status connected and therefore was transmitting frames.

Looking back in history, I had the experience with old Cat Supervisor type I having suddenly problems with fancy behaviour of the uplinks. I had to reboot the switch or change the board, if it happens twice.

Shall I wait until the problem is coming back ?

Thank you

Fred