PortChannel is going down and again UP many times

[tsipoulanis]

Hallo everyone,

we have in our network as Distribution Switch 4500x and some Catalyst as Access Layer.

one WS-C3560X-48T-L is connected with the 4500x by the Gi1/1.

unfortunately we received all the time the messages below.

is possible anyone to help for the troubleshooting?

the interface/portchannel is going from up state to down and again to up so fast, thats why the users dont issue a big problem.

although it seems to be a problem and we would like to solve it.

000429: *Jan 26 20:21:45.862: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to up
000430: *Jan 26 20:21:56.030: %EC-5-BUNDLE: Interface Te1/1/12 joined port-channel Po12
000431: *Jan 26 20:21:56.044: %LINK-3-UPDOWN: Interface Port-channel12, changed state to up
000432: *Jan 26 20:21:57.038: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to up
000433: *Jan 26 20:21:57.060: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel12, changed state to up
000434: 000091: *Jan 26 20:21:56.189: %EC-5-BUNDLE: STANDBY:Interface Te1/1/12 joined port-channel Po12
000435: *Jan 26 21:09:01.542: %EC-5-UNBUNDLE: Interface Te1/1/12 left the port-channel Po12
000436: *Jan 26 21:09:01.548: %LINK-3-UPDOWN: Interface Port-channel12, changed state to down
000437: *Jan 26 21:09:01.548: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to down
000438: *Jan 26 21:09:02.535: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to down
000439: *Jan 26 21:09:02.539: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel12, changed state to down
000440: 000092: *Jan 26 21:09:01.541: %EC-5-UNBUNDLE: STANDBY:Interface Te1/1/12 left the port-channel Po12
000441: *Jan 26 21:09:04.864: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to up
000442: *Jan 26 21:09:15.223: %EC-5-BUNDLE: Interface Te1/1/12 joined port-channel Po12
000443: *Jan 26 21:09:15.236: %LINK-3-UPDOWN: Interface Port-channel12, changed state to up
000444: *Jan 26 21:09:16.228: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to up
000445: *Jan 26 21:09:16.235: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel12, changed state to up
000446: 000093: *Jan 26 21:09:15.342: %EC-5-BUNDLE: STANDBY:Interface Te1/1/12 joined port-channel Po12
000447: *Jan 27 02:04:18.571: %EC-5-UNBUNDLE: Interface Te1/1/12 left the port-channel Po12
000448: *Jan 27 02:04:18.584: %LINK-3-UPDOWN: Interface Port-channel12, changed state to down
000449: *Jan 27 02:04:18.584: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to down
000450: *Jan 27 02:04:19.563: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to down
000451: *Jan 27 02:04:19.567: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel12, changed state to down
000452: 000094: *Jan 27 02:04:18.580: %EC-5-UNBUNDLE: STANDBY:Interface Te1/1/12 left the port-channel Po12
000453: *Jan 27 02:04:21.853: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to up
000454: *Jan 27 02:04:32.231: %EC-5-BUNDLE: Interface Te1/1/12 joined port-channel Po12
000455: *Jan 27 02:04:32.244: %LINK-3-UPDOWN: Interface Port-channel12, changed state to up
000456: *Jan 27 02:04:33.235: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to up
000457: *Jan 27 02:04:33.251: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel12, changed state to up
000458: 000095: *Jan 27 02:04:32.375: %EC-5-BUNDLE: STANDBY:Interface Te1/1/12 joined port-channel Po12

thank you in advance,

Thomas

[paul driver]

Hello

Have you check the physcal cabling  on these switches pertaing to this PC especailly TenGigabitEthernet1/1/12

Try reseating/Changing the cable(s), swapping out the module ( if applicable)

res
Paul

[tsipoulanis]

the switch is connected with the Distribution Switch.
unfortunately I have changed all the cables which are contecting the switches.
also i have changed and test with new / other SFPs and still the interfaces going DOWN and again UP many times.

[pwwiddicombe]

Have you tried using other infrastructure ports, or are these units close enough that they only have patch cords between them?  Sure the right cable is being used (i.e. consistently single or multimode along the whole path)?

Are the logs on the other end of the link similar (i.e. no real reason shown why the physical link is flapping) ?

[tsipoulanis]

from the other end i receive the error i post below, and is correct. because the connection is interrupted, the portchannel and the interface goes down.

for those who wonter why the whole portchannel/etherchannel goes down, is because for that switch and portchannel we have only one physical interface.

000569: *Jan 27 13:58:05.584: %EC-5-UNBUNDLE: Interface Te1/1/12 left the port-channel Po12
000570: *Jan 27 13:58:05.597: %LINK-3-UPDOWN: Interface Port-channel12, changed state to down
000571: *Jan 27 13:58:05.598: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to down
000572: *Jan 27 13:58:06.575: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to down
000573: *Jan 27 13:58:06.579: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel12, changed state to down
000574: 000111: *Jan 27 13:58:05.588: %EC-5-UNBUNDLE: STANDBY:Interface Te1/1/12 left the port-channel Po12
000575: *Jan 27 13:58:08.851: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to up
000576: *Jan 27 13:58:14.263: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to down
000577: *Jan 27 13:58:17.852: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to up
000578: *Jan 27 13:58:28.119: %EC-5-BUNDLE: Interface Te1/1/12 joined port-channel Po12
000579: *Jan 27 13:58:28.134: %LINK-3-UPDOWN: Interface Port-channel12, changed state to up
000580: *Jan 27 13:58:29.126: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to up
000581: *Jan 27 13:58:29.151: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel12, changed state to up
000582: 000112: *Jan 27 13:58:28.275: %EC-5-BUNDLE: STANDBY:Interface Te1/1/12 joined port-channel Po12
000583: *Jan 27 14:07:04.367: %EC-5-UNBUNDLE: Interface Te1/1/12 left the port-channel Po12
000584: *Jan 27 14:07:04.372: %LINK-3-UPDOWN: Interface Port-channel12, changed state to down
000585: *Jan 27 14:07:04.373: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to down
000586: *Jan 27 14:07:05.359: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to down
000587: *Jan 27 14:07:05.363: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel12, changed state to down
000588: 000113: *Jan 27 14:07:04.365: %EC-5-UNBUNDLE: STANDBY:Interface Te1/1/12 left the port-channel Po12
000589: *Jan 27 14:07:06.865: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to up
000590: *Jan 27 14:07:17.547: %EC-5-BUNDLE: Interface Te1/1/12 joined port-channel Po12
000591: *Jan 27 14:07:17.562: %LINK-3-UPDOWN: Interface Port-channel12, changed state to up
000592: *Jan 27 14:07:18.556: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to up
000593: *Jan 27 14:07:18.571: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel12, changed state to up
000594: 000114: *Jan 27 14:07:17.659: %EC-5-BUNDLE: STANDBY:Interface Te1/1/12 joined port-channel Po12

[paul driver]

Hello have you tried removing the pc

defaulting the physical interfaces

and recreating the port channel again from Stratch 

res

paul

[pwwiddicombe]

We still don't see the whole picture.

Are the two switches side by side?

Are all GBIC/SFP the same type (i.e. LX, LH, SX)

Are you sure the fiber is the right type (i.e. single mode if it matches the LX/LH)?

If the switches AREN'T side by side, is there any fiber patch panels in the middle, and are they all the correct kind?

Sometimes on short distances, you can "get away with" the wrong kind of fiber, but it isn't reliable.  It looks like it works sometimes...

[tsipoulanis]

as you asked (correct) there is a patch panel between the 2 switches.
for both of the sides we have "10/100/1000BaseTX SFP" and we dont have any fiber glass.

now i change the UpLink from the access switch, and now i use one of the Interface from the first 48 ports.

before i used the FRULink Module, maybe is defect.

I will wait until / if the issue will come again.