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January 25th, 2024 13:56
Computer activity generating strange up/down/up log entries for N1524P switches.
Hi all,
following issues with my Dell N1514P switches, i'm watching log "in depth".
I noticed that some computers, when users start them in the morning, generate an up/down/up cycle:
Line 260: 2024-01-24T08:52:50+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9358 %% Link Up: Gi1/0/3
Line 261: 2024-01-24T08:52:50+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9359 %% Gi1/0/3 is transitioned from the Forwarding state to the Blocking state in instance 0
Line 262: 2024-01-24T08:52:50+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9360 %% Gi1/0/3 is transitioned from the Learning state to the Forwarding state in instance 0
Line 263: 2024-01-24T08:52:57+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9362 %% Link Down: Gi1/0/3
Line 264: 2024-01-24T08:52:57+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9363 %% Link on Gi1/0/3 is failed
Line 265: 2024-01-24T08:52:57+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9364 %% Gi1/0/3 is transitioned from the Forwarding state to the Blocking state in instance 0
Line 266: 2024-01-24T08:53:01+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9366 %% Link Up: Gi1/0/3
Line 267: 2024-01-24T08:53:01+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9367 %% Gi1/0/3 is transitioned from the Forwarding state to the Blocking state in instance 0
Line 268: 2024-01-24T08:53:01+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9368 %% Gi1/0/3 is transitioned from the Learning state to the Forwarding state in instance 0
The firmware is in version 6.3, and spanningtree-portfast is enabled.
I have quite the same cycle with shutdown:
Line 131: 2024-01-23T18:06:08+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9163 %% Link Down: Gi1/0/3
Line 132: 2024-01-23T18:06:08+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9164 %% Link on Gi1/0/3 is failed
Line 133: 2024-01-23T18:06:08+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9165 %% Gi1/0/3 is transitioned from the Forwarding state to the Blocking state in instance 0
Line 134: 2024-01-23T18:06:11+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9167 %% Link Up: Gi1/0/3
Line 135: 2024-01-23T18:06:11+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9168 %% Gi1/0/3 is transitioned from the Forwarding state to the Blocking state in instance 0
Line 136: 2024-01-23T18:06:11+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9169 %% Gi1/0/3 is transitioned from the Learning state to the Forwarding state in instance 0
Line 137: 2024-01-23T18:06:18+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9171 %% Link Down: Gi1/0/3
Line 138: 2024-01-23T18:06:18+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9172 %% Link on Gi1/0/3 is failed
Line 139: 2024-01-23T18:06:18+00:00 RES042-1 TRAPMGR[trapTask]: traputil.c(721) 9173 %% Gi1/0/3 is transitioned from the Forwarding state to the Blocking state in instance 0
Is it an expected behaviour ? i am in early stages of investigations, and not an expert in ethernet wizardry :).
On another switch, which is running latest firmware, i removed spanning-tree portfast on all interfaces to see if it makes a difference.
All feedbacks are welcome :)
DELL-Chris H
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January 25th, 2024 18:09
FCambot,
This could be caused by a multitude of different things. What I would suggest is that you first try updating the switch and then if that doesn't work you may want to consider calling in to support, as it is likely going to require reviewing the logs and maybe directly working with the switch.
Let me know if this helps.
FCambot
4 Posts
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January 26th, 2024 08:15
Hi,
switch has already been updated to latest firmware.
It's working as expected, i would just like to understand why these log bursts are created, if it's an expected behaviour or not.
DELL-Erman O
Moderator
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2.8K Posts
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January 26th, 2024 09:07
Hi, it's hard to say the exact reason for me. It might be regarding loops, cabling or power issues, topology or even firmware issues. For example prevent loops you can use the spanning tree protocol. However, for depth troubleshooting you can contact your local Dell network team.