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New Member

CDP support over 7500 ATM IMA interface

I have a HUB 7513 router (vip2-50 card,8 port t1 ima) connected to ATM and Frame Relay Spoke routers.

ATM config is point-to-point aal5snap.

CDP is not discovering any of these Frame Relay Routers.

Is there a problem doing CDP over IMA?

Anyone have any ideas?

  • Other Network Infrastructure Subjects
5 REPLIES
Silver

Re: CDP support over 7500 ATM IMA interface

Cisco Discovery Protocol (CDP) support has been introduced in 12.2(8)T via CSCdt03339. Currently, CDP is only supported on AAL5SNAP RFC1483 PVCs and only on point-to-point Subinterfaces. Multipoint subinterface support is not planned as yet. So assuming you are using aal5snap encapsulation and the code specified and point to point sub-interfaces you should be able to use CDP.

Also the following versions are supported if you were interested:

12.3(2)T 12.2(15)ZJ1 12.2(15)T5 12.2(13)ZE 12.2(13)ZD 12.2(13)T5 12.2(11)YT2 12.2(11)T9 12.2(8)ZB7 12.2(8)YN1 12.2(8)T8

Hope this helps,

Don

New Member

Re: CDP support over 7500 ATM IMA interface

I have read this:

We are using aal5snap and we have tried multiple IOS releases (currently 12.3(2)T), but to no avail.

The ATM Hub router says it is sending CDP packets, so does the frame relay routers, but neither router every reports incoming cdp packets.

Thanks

Silver

Re: CDP support over 7500 ATM IMA interface

So you are doing ATM to Frame Relay (FRF.x?). I did not get this for some reason out of your original post. In this case CDP will not work. ATM end to end is supported with the criteria specified. What is your requirement? Possibly there is something other than CDP that will get this to work for you.

Hope this helps,

Don

New Member

Re: CDP support over 7500 ATM IMA interface

AT&T's network service is doing the ATM to Frame conversion. Our Hub routers are ATM and Spoke routers are Frame.

Our Ciscoworks2000 is not discovering Spoke routers. CW2000 uses cdp in the discovery process.

Thanks again

Andrew

Silver

Re: CDP support over 7500 ATM IMA interface

Within your network discovery setup on CWSI can you not specify a ping spray as well as a discovery method? CDP is one way of doing discovery but the ping option (given a network range) should do the trick. Also within newer Cisco works discovery (don't know the version) there are some enhancements being made to allow some routing protocols to be used in this process as well (BGP/OSPF) that would possibly help you.

Regards,

Don

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