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Layer 3 for neighbors Routers connected ?

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Rakshas replied on Fri, Jan 27 2012 10:34 AM
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Hi i am using  NPM 10.2.1 

We have 2 Cisco Routers and both are connected with Sr Interfaces i have L3 enabled but i am not able to connect through (Connect Now and Not able to see the both connected with "Network Topology " however they shows the receptive Switch connected . 

I have tried rediscovery for the routers / i can see the CDP info in the both routers . 

What should i do next to get this working ? 

 

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Answered (Verified) mavturner replied on Thu, Feb 2 2012 2:37 PM
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Rakshas, I apologize for the delay in getting back with you.

NPM does not currently collect topology information based on CDP data. This is something we are interested in adding in the future (see the What we are working on post). 

The layer 2 topology job looks at the Bridge-MIB and the layer 3 topology job collects data from IPNetToMedia MIB (ARP table). The L2 job gives us the MAC addresses. If you are managing a node with SNMP, then we will correlate this node with the port it is connected to based on the data in the Bridge MIB. If you are not managing it with SNMP (maybe WMI or ICMP) then we don't know the MAC address for the device so leverage the Layer 3 data (ARP) to find the correlation between IP and MAC and then connect the MAC to the proper port. This isn't exactly a true L3 link (like a routed link).

Mav

Mav Turner
SolarWinds Product Manager, Networking Products

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Rakshas replied on Fri, Jan 27 2012 10:35 AM
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Also i want to know what is L3 going to collect if i have enabled for the devices ? 

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Rakshas replied on Sat, Jan 28 2012 8:46 AM
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Bump ! please advise . Thanks.

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DanielleH replied on Mon, Jan 30 2012 12:48 PM
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Hi Rakshas--

Did you try this with the Network Sonar Discovery?  If you have and still nothing has been found, I would recommend opening a support ticket.

Thanks,
DH

 

Danielle Higgins | Community Team | SolarWinds

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Rakshas replied on Wed, Feb 1 2012 2:00 PM
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Thanks Sir .

Yes i did Network Sonar Discovery and that is fine .

My Connect now is working fine for L2 switches and L2 devices. (however ) not for L3 devices . 

I have questions that is Network Atlas  connect now will work for L3 to L3 devices  ?  (Router to Router ) 

will Devices connected on L3 to L3 devices will show up in " NPM Network Topology " ? (Router to Router )

What Orion L3 option is collecting from devices ? 

 

I can see my show CDP is working shows correct devices connected.

Kind Regards

Rakshas.  

 

 

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Rakshas replied on Thu, Feb 2 2012 2:33 PM
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Anything on this please.

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Answered (Verified) mavturner replied on Thu, Feb 2 2012 2:37 PM
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Verified by Rakshas

Rakshas, I apologize for the delay in getting back with you.

NPM does not currently collect topology information based on CDP data. This is something we are interested in adding in the future (see the What we are working on post). 

The layer 2 topology job looks at the Bridge-MIB and the layer 3 topology job collects data from IPNetToMedia MIB (ARP table). The L2 job gives us the MAC addresses. If you are managing a node with SNMP, then we will correlate this node with the port it is connected to based on the data in the Bridge MIB. If you are not managing it with SNMP (maybe WMI or ICMP) then we don't know the MAC address for the device so leverage the Layer 3 data (ARP) to find the correlation between IP and MAC and then connect the MAC to the proper port. This isn't exactly a true L3 link (like a routed link).

Mav

Mav Turner
SolarWinds Product Manager, Networking Products

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Rakshas replied on Fri, Feb 3 2012 6:51 AM
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Thank you so much for clarification . That's all i would like to know.

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