monitor agent talk in a multiple vlans scenario

[ciscoforum]

We'll setup dedicated voip monitor server to monitor and record agent talk. But currently there are 4 vlans where agents phone are in. Can we use a quad-NIC in the server to montior 4 vlans?

[Chris Deren]

You want to use either VSPAN or RSPAN sessions on the Cisco swtiches, what type of switches are you using?

sample config on the access switches:

monitor session 1 source vlan 20

monitor session 1 destination remote vlan 500

and on switch were you plug in your sniffer/voice recorder:

monitor session 1 destination interface Gi0/24

monitor session 1 source remote vlan 500

some links for 6500:

http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_guide_chapter09186a008007fb25.html

for 3550:

http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_guide_chapter09186a00803fb0ce.html

just search for: configuring rspan on cisco

[ciscoforum]

Thanks. But this doesn't help multiple vlan issue. Right?

[Chris Deren]

Yes it does as a source you can pick multiple vlans, also if there is seperate voice vlan on seperate switch, create a session on each one with the destination remote vlan 500. The session will see all VLANs. Depending on your topology you can SPAN the trunk port as well. How does your network look like? How many switches? Are the 4 VLANs on the same switch or one per each?

[ciscoforum]

Hi

I have 5 switches cascated. Vlans are all over the switches. Some switches have more than 1 vlan.

But according to this link, it doesn't support multiple vlans

http://www.cisco.com/en/US/partner/products/sw/voicesw/ps556/products_tech_note09186a00801a62a8.shtml#topic12

on section VoIP Monitor and Phones in Multiple VLANs

and also in Cisco IPCC srnd ). "Silent monitoring and recording works only when the VoIP Monitor port is a

member of the same VLAN as the port being monitored."

See the link http://www.cisco.com/application/pdf/en/us/guest/netsol/ns87/c649/ccmigration_09186a00801c732b.pdf on chapter 6.

Thanks very much. Looking forward to your answer

[adignan]

100% you can have multiple VLAN's if you RSPAN. Secondly what I have found as the best option if you ONLY need to monitor/record Agent > PSTN calls (and vice versa) just make sure the gateway and monitoring NIC are in the same switch and just SPAN the port the gateway that contains your PRI's is plugged into. If your requirement is only the PSTN calls that is far and away the best option. If you do need to monitor/record internal calls, disregard what that link says and configure RSPAN.

andy - berbee

[ciscoforum]

Thanks.I'll test it out. My gateway has been monitored by the other application already. So I only can monitor agents.

Say Rspan supports it as you said, I guess the stuff indicated in Cisco document is talking about on the same Switch.

Another question: Could the monitor to monitor the phones on the same switch using span while using rspan monitor the other switches?

Thanks.

[Chris Deren]

If you are using only one switch you could use SPAN, if you monitor multiple switches RSPAN is the way to go. You create one RSPN session on all switches and point to the the same Remote VLAN. Then on the switch where you plugin the sniffer the remote vlan is your source, like I gave an example earlier. My uess is the documentation is either old or not accurate.