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CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-Access

Is there a way for the Network Topology View to show Virtual-Access Links? I am using PPP Multilink with 2 T.15 interfaces and the links do not show up in the map. Maybe because it uses CDP, and CDP does not work with Virtual-Access links. Anyhow, how can I get the links to show in the map?

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Cisco Employee

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

This is not possible. You must be able to run CDP across links for them to appear on the Topology Map. There is no way to manually add links.

10 REPLIES
Cisco Employee

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

This is not possible. You must be able to run CDP across links for them to appear on the Topology Map. There is no way to manually add links.

New Member

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

Thanks jclarke

Wish this was NOT the answer, but....

New Member

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

We decided to eliminate the PPP multilink and configure the two T1.5s as serial P-P links. The show cdp neigh commands show the two links, but in the topology map, only of the two serial interfaces display. Any clue why ? I have rediscovered the devices a couple of times manually and the normal schedule discovery.

Cisco Employee

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

I don't follow. Can you post a screenshot illustrating what you're seeing on the map?

New Member

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

Sure...thanks a lot on the help. Attached is a screenshot. Do you suggest any specific training on CW LMS ?

Cisco Employee

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

Please post the show cdp nei detail output from both devices. Also, I see two Serial2M links are on your map. Do you have another T1 PPP link? If not, if you click on this checkbox to highlight the links, do you see two highlighted lines, or just one?

New Member

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

See the show cdp nei det in the attachment. To answer your question, yes, I do have other PPP multilink circuits configured in the network. I have only changed just one of the PPP Multilinks at this point. Just a note..If I highlight the Serial2M check box, the map show many of the links that are plan old t1 point to point. I do not know where the Serial2M reference comes from.

Cisco Employee

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

Please post an snmpwalk from both devices for .1.3.6.1.4.1.9.9.23.1.2.1 and ifDescr.

New Member

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

Thanks Again...Here it is...

Cisco Employee

Re: CWLMS 3.0.1 Network Topology Ver 5.0 PPP Multilink Virtual-A

It looks like you may have found a bug or limitation in Campus Manager. This output looks good. Unfortunately, I don't have a dual PPP setup handy to test this. Therefore, I suggest you open a TAC service request with the information you've collected thus far.

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