Re: Trunk port going up and down...

cre8toruk · ‎08-25-2021

Hi all,

I've noticed the below on our core switch to edge switch connection since forever really... I'm wondering if it's some sort of load balancing or if it indicates a problem ?

The Core is a pair of stacked SG350XG-2F10's and the edge is a stack of 4 SG350X-48's.

I have a cable in 10Gbe uplinks connected to SW1 and SW4 in the edge stack which then connect to te1/0/1 and te2/0/1 on the core.

Can anyone shed any light ?

2147417691 2021-Aug-25 08:00:19 Informational %TRUNK-I-PORTADDED: Port te1/0/1 added to Po3
2147417692 2021-Aug-25 08:00:16 Informational %LINK-I-Up: te1/0/1
2147417693 2021-Aug-25 07:31:56 Warning %LINK-W-Down: te1/0/1
2147417694 2021-Aug-25 07:31:56 Informational %LINK-I-Up: te1/0/1
2147417695 2021-Aug-25 07:02:53 Warning %LINK-W-Down: te1/0/1
2147417696 2021-Aug-25 07:02:53 Informational %LINK-I-Up: te1/0/1
2147417697 2021-Aug-25 06:58:17 Warning %LINK-W-Down: te1/0/1
2147417698 2021-Aug-25 06:58:17 Warning %TRUNK-W-PORTREMOVED: Port te1/0/1 removed from Po3
2147417699 2021-Aug-25 06:58:09 Informational %TRUNK-I-PORTADDED: Port te1/0/1 added to Po3
2147417700 2021-Aug-25 06:58:06 Informational %LINK-I-Up: te1/0/1
2147417701 2021-Aug-25 05:36:10 Warning %LINK-W-Down: te1/0/1
2147417702 2021-Aug-25 05:36:10 Informational %LINK-I-Up: te1/0/1
2147417703 2021-Aug-25 04:01:36 Warning %LINK-W-Down: te1/0/1
2147417704 2021-Aug-25 04:01:36 Informational %LINK-I-Up: te1/0/1
2147417705 2021-Aug-25 03:49:39 Warning %LINK-W-Down: te1/0/1
2147417706 2021-Aug-25 03:49:39 Informational %LINK-I-Up: te1/0/1
2147417707 2021-Aug-25 03:45:35 Warning %LINK-W-Down: te1/0/1
2147417708 2021-Aug-25 03:45:35 Warning %TRUNK-W-PORTREMOVED: Port te1/0/1 removed from Po3
2147417709 2021-Aug-25 00:46:23 Informational %TRUNK-I-PORTADDED: Port te1/0/1 added to Po3
2147417710 2021-Aug-25 00:46:20 Informational %LINK-I-Up: te1/0/1
2147417711 2021-Aug-25 00:35:18 Warning %LINK-W-Down: te1/0/1
2147417712 2021-Aug-25 00:35:18 Warning %TRUNK-W-PORTREMOVED: Port te1/0/1 removed from Po3
2147417713 2021-Aug-25 00:19:43 Informational %TRUNK-I-PORTADDED: Port te1/0/1 added to Po3
2147417714 2021-Aug-25 00:19:40 Informational %LINK-I-Up: te1/0/1
2147417715 2021-Aug-24 23:52:20 Warning %LINK-W-Down: te1/0/1
2147417716 2021-Aug-24 23:52:20 Warning %TRUNK-W-PORTREMOVED: Port te1/0/1 removed from Po3
2147417717 2021-Aug-24 23:51:59 Informational %TRUNK-I-PORTADDED: Port te1/0/1 added to Po3
2147417718 2021-Aug-24 23:51:56 Informational %LINK-I-Up: te1/0/1
2147417719 2021-Aug-24 23:29:26 Warning %LINK-W-Down: te1/0/1
2147417720 2021-Aug-24 23:29:26 Informational %LINK-I-Up: te1/0/1
2147417721 2021-Aug-24 22:49:37 Warning %LINK-W-Down: te1/0/1
2147417722 2021-Aug-24 22:49:37 Informational %LINK-I-Up: te1/0/1
2147417723 2021-Aug-24 22:28:16 Warning %LINK-W-Down: te1/0/1
2147417724 2021-Aug-24 22:28:16 Informational %LINK-I-Up: te1/0/1
2147417725 2021-Aug-24 22:15:59 Warning %LINK-W-Down: te1/0/1
2147417726 2021-Aug-24 22:15:59 Warning %TRUNK-W-PORTREMOVED: Port te1/0/1 removed from Po3
2147417727 2021-Aug-24 18:58:07 Informational %TRUNK-I-PORTADDED: Port te1/0/1 added to Po3
2147417728 2021-Aug-24 18:58:04 Informational %LINK-I-Up: te1/0/1
2147417729 2021-Aug-24 18:52:19 Warning %LINK-W-Down: te1/0/1
2147417730 2021-Aug-24 18:52:18 Informational %LINK-I-Up: te1/0/1
2147417731 2021-Aug-24 18:48:16 Warning %LINK-W-Down: te1/0/1
2147417732 2021-Aug-24 18:48:16 Warning %TRUNK-W-PORTREMOVED: Port te1/0/1 removed from Po3
2147417733 2021-Aug-24 11:50:45 Informational %TRUNK-I-PORTADDED: Port te1/0/1 added to Po3
2147417734 2021-Aug-24 11:50:42 Informational %LINK-I-Up: te1/0/1
2147417735 2021-Aug-24 11:24:20 Warning %LINK-W-Down: te1/0/1

marce1000 · ‎08-25-2021

- It could be a physical link (layer) problem,. check logs at the other end too, also look at port-counters , at both ends.

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

MHM Cisco World · ‎08-25-2021

check error disable by

show interface status,

do this when the interface down.

Giuseppe Larosa · ‎08-25-2021

Hello @cre8toruk ,

check the signal level (power) on the fiber link on both ends.

There may be too much attenuation and one receiver has the received power near the lowest valid value.

One of the following commands should work

show interface te1/0/1 transceiver detail

or

show controller ten1/0/1 detail

see the power levels on both ends

also the show interface te1/0/1 should show an high rate of input errors CRC or other type.

Hope to help

Giuseppe

cre8toruk · ‎08-26-2021

Hi Giuseppe,

thanks but the connections are copper.

kr

Paul.

paul driver · ‎08-28-2021

Hello

@cre8toruk wrote:

Hi Giuseppe,

thanks but the connections are copper.

kr

Paul.

How far is the length of the switch interconnection on this copper?
When applicable perfrom a TDR test and post the results:

test cable tdr interface X/X - (note perfroming test is disruptive to the link)

Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul