Spanning tree screw up

2000-08-31 Thread alex campbell

hello ppl
I have a cat 5500 with 12 ethernet cards and an RSM
over the weekend I repatched the whole network and added a couple new 
vlans...it all seems to work.
However

this message seems to come up occasionally
%MLS-4-RESUMESC:Resume MLS after detecting too many moves
%MLS-4-MOVEOVERFLOW:Too many moves, stop MLS for 5 sec (200)

my telnet connection to the switch seems to disconnect when it feels like it 
(which is SO enjoyable when configuring VLANs :))
on looking through the Cisco Web Site, I understand that its a spanning tree 
problem. However, do any of you guys know if rebooting the switch would 
solve the problem ? and if not, what will ?
Thanks
Alex

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RE: Spanning tree screw up

2000-08-31 Thread Bosio Stefano

i had a similar problem with a cat 5500 the problem was a encapsulation
mismatch on a trunk. Correct the mismatch and the messagge go away (but for
me wasn't occasionally but every 5 seconds)

hope this help

Stefano


> -Original Message-
> From: alex campbell [mailto:[EMAIL PROTECTED]]
> Sent: giovedì 31 agosto 2000 14.52
> To: [EMAIL PROTECTED]
> Subject: Spanning tree screw up
> 
> 
> hello ppl
> I have a cat 5500 with 12 ethernet cards and an RSM
> over the weekend I repatched the whole network and added a couple new 
> vlans...it all seems to work.
> However
> 
> this message seems to come up occasionally
> %MLS-4-RESUMESC:Resume MLS after detecting too many moves
> %MLS-4-MOVEOVERFLOW:Too many moves, stop MLS for 5 sec (200)
> 
> my telnet connection to the switch seems to disconnect when 
> it feels like it 
> (which is SO enjoyable when configuring VLANs :))
> on looking through the Cisco Web Site, I understand that its 
> a spanning tree 
> problem. However, do any of you guys know if rebooting the 
> switch would 
> solve the problem ? and if not, what will ?
> Thanks
> Alex
> 
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Re: Spanning tree screw up

2000-08-31 Thread Flem

Alex ,


"Move" means a mac/vlan in cam table changes its port
index, usually it is caused by :

1/ misconfiguration . The switch to learn the same
mac/vlan from two different ports in turns. 

2/ spt loops

Here is how you can get some insight in the problem ;
If i recall correctly ;

on the switch type 'show mls notification'
You will get something like ;

 1: (0005f9df-00023380) Noti Chg TA 1d9de OI 180 V 1 



OI ===> port index it learns, 
take 4 high bits plus 1 = module number 
take 6 low bits plus 1  = port number 

TA ==> table address in the cam table .

Now in the example ;

OI 180 ===> 00011000
  ^^ + 1 = port number
   + 1 = module number
This case 7/1 .

To find the mac address that causes the moves do :

'sh looktable < TA-value from above>


This tells you the mac involving the moves and on what
ports it is 'moving' .
Next step is finding what/were this mac is .


flem 
--- alex campbell <[EMAIL PROTECTED]> wrote:
> hello ppl
> I have a cat 5500 with 12 ethernet cards and an RSM
> over the weekend I repatched the whole network and
> added a couple new 
> vlans...it all seems to work.
> However
> 
> this message seems to come up occasionally
> %MLS-4-RESUMESC:Resume MLS after detecting too many
> moves
> %MLS-4-MOVEOVERFLOW:Too many moves, stop MLS for 5
> sec (200)
> 
> my telnet connection to the switch seems to
> disconnect when it feels like it 
> (which is SO enjoyable when configuring VLANs :))
> on looking through the Cisco Web Site, I understand
> that its a spanning tree 
> problem. However, do any of you guys know if
> rebooting the switch would 
> solve the problem ? and if not, what will ?
> Thanks
> Alex
> 
>
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> Get Your Private, Free E-mail from MSN Hotmail at
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> 
> Share information about yourself, create your own
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> 
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