12-09-2008 08:29 PM - edited 03-06-2019 02:53 AM
Hi, we are have strange problem with sup720-base:
In different time CPU utilization equal ~99-100%
and we have out for service (we haven't ping to the switch!)
I start stp debug all, and when cpu grow to 100% I recieve these messages:
Dec 10 08:38:54: SPANTREETYPE: getting tree type vlan for parameter 1 value 1
Dec 10 08:38:54: stp: begin nvgen vlan 999 config blocks
Dec 10 08:38:54: stp: nvgen state 0 config blocks
Dec 10 08:38:54: stp: nvgen protocol 0 config blocks
Dec 10 08:38:54: stp: nvgen priority 999 config blocks
Dec 10 08:38:54: stp: nvgen hello 0 config blocks
Dec 10 08:38:54: stp: nvgen fwddelay 0 config blocks
Dec 10 08:38:54:et1/3 (462FA4B8)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/3 1=2 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/3 (462FA4B8) stp: n
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/3 1=3 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/3 (462FA4B8)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/3 1=1 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/3 (462FA4B8)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/3 12=1 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/3 (462FA4B8)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/3 11=1 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/3 (462FA4B8)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/3 9=1 rc=1vgen maxage 0 config blocks
Dec 10 08:38:55: STP CFG: found (462FA4B8)
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/3 (462FA4B8)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/3 4=3 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/3 (462FA4B8)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/3 3=3 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/4 1=2 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/4 1=3 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/4 1=1 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/4 12=1 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/4 11=1 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/4 9=1 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
Dec 10 08:38:55: STP CFG: get port param mst 0 GigabitEthernet1/4 10=1 rc=1
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
Dec 10 08:38:55: STP CFG: get port param unknown 0 GigabitEthernet1/4 7=1 rc=0
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
Dec 10 08:38:55: STP CFG: found port cfg GigabitEthernet1/4 (462FBA20)
and more...
maybe somewho know what is it and how it can be fixed?
12-09-2008 08:52 PM
Is GigabitEthernet interface 1/3 and 1/4 are providing redundancy? Looks like in loop. Is it possible to take out one and see if that break the loop.
12-09-2008 09:02 PM
This ports is disabled...
witchcraft...
12-09-2008 10:16 PM
go for show cdp nei command, if you see the same switch then its a loop between ports on the same switch.
does the 100% cpu is reached after you issue debug all command, for information the debug all command is very process intensive.
12-09-2008 11:40 PM
cdp don't display same switch.
about debug - we enable only spanning-tree debug.
12-10-2008 12:09 AM
did u try
show processes cpu i think it tells u which process is utilizing that much CPU. Maybe that can help you to crack the problem.
12-10-2008 12:19 AM
done, but I don't seen any process that utilize CPU
12-10-2008 12:17 AM
Hello Aleksey,
I lost a C4506 switch just doing debug stp packets so it is quite heavy for the switch.
You say the two ports are disabled are also unplugged ?
Hope to help
Giuseppe
12-10-2008 12:22 AM
Hello, Guiseppe!
Yes! Ports disabled and unplugged...
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