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Author Topic: Layer 2 trace  (Read 4653 times)

piet

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Layer 2 trace
« on: October 01, 2010, 09:22:12 AM »
Hello Nedi Fans,

first of all I would like to thank you for this fantastic tool.

I replace more and more of the network management tools by Nedi.

But in a different tool, I use an interesting feature, which could maybe integrated into a future release of Nedi?

They call it 'Layer 2 Trace'. Functionality of this feature is, to get the path through the network from one node to another.
You can select a source node and a destination node an the result is a table displaying the layer 2 path through the network.

To make it clearer, here is an example for such a table

Device   IP Address   Interface Name
SourceDevice.test.local   192.168.1.10   65539 - Vmware PCI Ethernet Adapter
AccessSwitch01.test.local   192.168.1.20   Gi0/12
AccessSwitch01.test.local   192.168.1.20   Gi0/20
DistributionSwitch01.test.local   192.168.1.30   Gi2/0/5
DistributionSwitch01.test.local   192.168.1.30   Gi1/4/21
BackBoneSwitch02.test.local   192.168.1.52   Gi1/3/12
BackBoneSwitch02.test.local   192.168.1.52   Gi2/1/15
DistributionSwitch02.test.local   192.168.1.33   Gi1/0/17
DistributionSwitch02.test.local   192.168.1.33   Gi1/2/21
AccessSwitch04.test.local   192.168.1.49   Gi0/10
AccessSwitch04.test.local   192.168.1.49   Gi0/16
DestinationDevice.test.local   192.168.1.64   1 - ln0

I think, the information to create such a table is already in the database. Maybe it is not too difficult, to implement such a feature?

What do the others think about that? Would that be a helpful feature for others too?

Piet

piet

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Re: Layer 2 trace
« Reply #1 on: October 22, 2010, 12:14:01 PM »
No comments on this feature?

Nobody interested in? :(

tristanbob

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Re: Layer 2 trace
« Reply #2 on: October 22, 2010, 11:13:18 PM »
Piet,

Nedi already keeps track of CDP neighboring devices, so it understands how the network devices connect to each other.   It also knows which switchport each mac address is plugged into. 

The question I have is how does your trace tool determine which routed path to take?

Remo would have to answer how hard it would be to implement this tool.

Tristan
Please visit "Other"->"Invoices" on your NeDi installation to make an annual contribution and support Nedi!

piet

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Re: Layer 2 trace
« Reply #3 on: October 23, 2010, 06:24:33 PM »
I do not know, how the tool (it is 'What's up Gold') internally works.

I assume, that it retreives the layer 2 connections from the internal database - as NeDi could do it as well.

The input mask is very easy - just a drop down fild to select a source device and a second drop down field to select the target device. Then it displays the layer 2 route through the network form source to target as described in my initial post.

We use that feature for troubleshooting.

Piet

rickli

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Re: Layer 2 trace
« Reply #4 on: October 23, 2010, 10:31:29 PM »
Tristan is right, the topology is in the DB. I throw away MACs on uplinks though, which makes it harder (not impossible) to perform a trace. Could even be integrated in Topology-Map. Have to look at that one anyway...we'll see, when I find the time. But let me get 1oh6 out first!
Please consider Other-Invoices on your NeDi installation for an annual contribution, tx!
-Remo

piet

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Re: Layer 2 trace
« Reply #5 on: October 24, 2010, 01:21:36 PM »
Hello Remo,

that sounds very good  :)

An additional graphical view of the layer 2 route (Topology Map) through the network would be an extraordinary feature...

I am looking forward to 1oh6 and maybe you will find some time later for the layer 2 trace feature - if that would be a helpful feature for others too.

Thanx a lot again for that fantastic tool..

Piet