02-25-2009 07:21 AM - edited 03-06-2019 04:14 AM
SiteA-DSW1-ASW1--WL--SiteB-DSW1.
IP address configured on both DSW switches in the diagram.
On the interface on DSW1, it shows both the other two siwtches when you do show cdp neighbor on any of the interfaces of all 3 interaces of each of the switches.
How it is so? my understanding is that it only shows ASW1 if you do "show cdp neighbor" on the SiteA-DSW1.
Thanks,
Han
Solved! Go to Solution.
02-25-2009 11:18 AM
Hello Han,
I do think so
the radio device should just perform a basic check of ethernet frame integrity before sending it on air
Hope to help
Giuseppe
02-25-2009 07:31 AM
Hello Han,
are all Cisco devices involved here ?
What are the models and IOS versions ?
Is the link a L2 trunk ?
Ther is any form of EoMPLS or other L2 transport service involved ?
Hope to help
Giuseppe
02-25-2009 07:40 AM
Giuseppe:
are all Cisco devices involved here ? All 3 switches are from cisco.
What are the models and IOS versions ?
SiteA-DSW1: 6500 with Version 12.2(18)
ASW: 4000 L3 Version 12.2(25)EWA5
SiteB-DSW1:6500 with Version 12.2(18)
Is the link a L2 trunk ?
The link between SiteA-DSW1 and SW1 is L2 trunk.
Ther is any form of EoMPLS or other L2 transport service involved ? Shouldn't.
Thanks,
Han
02-25-2009 09:45 AM
Hello Han,
here I would start to investigate the device in the middle:
because it should be the one that forwards the multicast CDP frames causing to see multiple neighbors.
Hope to help
Giuseppe
02-25-2009 09:55 AM
Giuseppe:
forgot to mention.
WL in the middle = Radio.
Does a radio device forward multicast frames?
Thanks,
Han
02-25-2009 11:18 AM
Hello Han,
I do think so
the radio device should just perform a basic check of ethernet frame integrity before sending it on air
Hope to help
Giuseppe
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide