From: Greg Parrish (gparrish@xxxxxxxxx)
Date: Sat Apr 06 2002 - 18:31:43 GMT-3
Gregg from what I have learned CDP is truly not supported over ATM by Cisco. I
t
will at times work depending on hardware or configuration. For example I think
it works over LANE and maybe 1483 bridged pvcs since these will bridge packets.
There are several places on the Cisco web site that say it is not supported but
less that report that it is supported such as the one you pointed out. There h
as
been a bug filed to get this supported across ATM in a normal manner and last I
heard this is now supported in 12.2.7T2. In the meantime you might want to try
show atm pnni neighrbor command on the ATM switch to get some similar info.
Thanks,
Greg.
Gregg Malcolm wrote:
> Group,
>
> I'm renting some time on an ATM rack tonight and have a question about CDP.
> I'm having a hard time getting CDP to work. Has anyone else tried to use CDP
> on ATM int's ? For a little while, I was thinking it wasn't supported over
> ATM, but I was wrong. From CCO :
>
> <snip>
> CDP runs on all media that support Subnetwork Access Protocol (SNAP),
> including local-area network (LAN), Frame Relay, and Asynchronous Transfer
> Mode (ATM) physical media. CDP runs over the data link layer only. Therefore,
> two systems that support different network-layer protocols can learn about
> each other.
>
> So, I config'ed a PVC with aal5snap encap and CDP still does not find any
> neighbors. When I try to enable it on the ATM int, I get this error :
> "% CDP is not supported on this interface, or for this encapsulation " My
> interface is a multipoint which might be the reason.
>
> Any ideas ? I've found CDP to be a life saver when I don't know much about
> the remote device (when I remember to use it).
>
> Thanks, Gregg
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