I have setup a voice recorder to record the Cisco IP phone calls on my network. We have 6 buildings interconnected by fiber, and all the voice traffic is on VLAN5. So on my remote switches (all 3560s) I have
mon sess 1 source vlan 5
In the switch were the recorder is I created a new Vlan, Vlan 20. So also on the remote switches I added
mon sess 1 dest remote vlan 20
All good so far. But now I am stumped. I need to 'route' Vlan 20 to a 'subinterface' on the main 3560. How do I do that?? Plus I would like to capture the IP phone traffic on this switch to...I tried
mon sess 1 source vlan 20
mon sess 1 dest remote vlan 5
but it didn't like that.
All my devices (including phones) are in the 192.168.x.y range (phones are in the 5, switches in 7, PCs in 10, etc.)
I am not sure about your statement about needing subinterfaces on the VLAN of your switch. It seems to me that to route between vlans what you need is interface vlan 5 with its IP address and then interface vlan 20 with its interface, and verify that ip routing is enabled on the switch. That should allow you to route between the VLANs.
Having said that I wonder if you really need "routing" between the subnets. If you are trying to set up a monitor session with the source in vlan 5 and the destination in vlan 20 it does not require routing between the vlans for this to work. You just need to be sure that trunking is enabled between the switches and that the trunk is carrying both vlan 5 and vlan 20.
If there is something that I have not correctly understood then perhaps you can clarify for me.
I am not sure that port 14 knows that he is associated with vlan 20 (or that it needs to know). My understanding of the monitor/span function is that when you assign a port as the monitor destination it no longer functions as an access port and does not have the normal vlan association. The switch sends the monitor output to the port.
In the output that you posted I notice that remote span vlan is disabled. I suspect that you will need it enabled for your monitor to work.
It gets a little confusing because on some of the bigger Catalyst switches there was a SPAN and RSPAN command where the same functions on your switch use the monitor command.
But yes what you need is span and rspan which are configured using the monitor command on your switch. The link that John posted is pretty good and should help you understand what you need to configure to get this going.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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