[c-nsp] Layer-2 Flapping log messages

Todd, Douglas M. DTODD at PARTNERS.ORG
Wed Jan 12 12:03:24 EST 2005


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The address in question is a multicast address so it's very possible
that two machines have the same multicast informtion.
==DMT>

%SIG%

Douglas M. Todd, Jr.
Network Engineering (MGH/CNY/NSMC/MCLEAN)
Partners Health Care
Building 149 13th Street
Location: 149-10-10056E
Charlestown, MA 02129-2000 (MGH)
(T): 617.726.1403
(F): 617.724.9871
Security:
Verisign S/N: 7b1bb86860eb26a53b57c8acb8e9fc4f
pgp: search keyserver for: dtodd at partners.org 

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old>>-----Original Message-----
old>>From: cisco-nsp-bounces at puck.nether.net 
old>>[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of 
old>>Hudson Delbert J Contr 61 CS/SCBN
old>>Sent: Wednesday, January 12, 2005 11:22
old>>To: Robert Walton; cisco-nsp at puck.nether.net
old>>Subject: RE: [c-nsp] Layer-2 Flapping log messages
old>>
old>>though i cant say for sure but it seems to be stating that 
old>>it sees flapping in both directions. 
old>>
old>>-----Original Message-----
old>>From: cisco-nsp-bounces at puck.nether.net
old>>[mailto:cisco-nsp-bounces at puck.nether.net]On Behalf Of 
old>>Robert Walton
old>>Sent: Wednesday, January 12, 2005 12:55 AM
old>>To: cisco-nsp at puck.nether.net
old>>Subject: [c-nsp] Layer-2 Flapping log messages
old>>
old>>
old>>Hi,
old>>
old>>	Just looking at some logs for flapping and wonder what 
old>>the difference is between these two logs i.e. is there a 
old>>specific meaning behind the specifying of the interfaces 
old>>being the opposite way round on the second log entry.
old>>
old>>Jan 10 12:07:35.776 GMT: %C4K_EBM-4-HOSTFLAPPING: Host 
old>>00:00:5E:00:01:1C in vlan 215 is flapping between port 
old>>Fa2/48 and port Fa2/3 Jan 10 12:07:41.676 GMT: 
old>>%C4K_EBM-4-HOSTFLAPPING: Host 00:00:5E:00:01:1C in vlan 
old>>215 is flapping between port Fa2/3 and port Fa2/48
old>>
old>>cheers,
old>>Rob
old>>
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