RSPAN: VoIP Traffic

Answered Question
Jun 9th, 2009
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RSPAN


Customer has bought voice recorder software, and would like to capture.

viop traffic from vlan 10 and vlan 20

Please see attachment.


Q. How do I configure Rspan on the edge and core switches to cature the voice traffic.


Q. Will the voice recored server host port be a trunk port.



Please advise,


Regards,

Colm




Attachment: 
Correct Answer by iyde about 7 years 11 months ago

Q. How do I configure RSPAN on the edge and core switches to capture the voice traffic.

A: In the Edge switches you configure a SPAN session with VLAN 10 or VLAN 20, respectively, as the source, and a RSPAN VLAN as destination.

Example:

vlan xxx

name RSPAN_VLAN

remote-span

exit

monitor session 1 source interface vlan10|vlan20

monitor session 1 destination remote vlan xxx


In the core you configure the RSPAN VLAN as source and the physical interface to which the Voice Recorder is attached as the destination. Example:

vlan xxx

name RSPAN_VLAN

remote-span

exit

monitor session 1 source remote vlan xxx

monitor session 1 destination interface gig1/1


Make sure that VLANxxx is allowed on the trunk between edge switches and core switch.

Read more about SPAN and RSPAN here: http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_46_se/configuration/guide/swspan.html


Q. Will the voice recored server host port be a trunk port.

A: No. The port will be a SPAN destination port. See http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_46_se/configuration/guide/swspan.html#wp1036749 for details.


HTH.

Ingolf

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Correct Answer
iyde Tue, 06/09/2009 - 08:00
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Q. How do I configure RSPAN on the edge and core switches to capture the voice traffic.

A: In the Edge switches you configure a SPAN session with VLAN 10 or VLAN 20, respectively, as the source, and a RSPAN VLAN as destination.

Example:

vlan xxx

name RSPAN_VLAN

remote-span

exit

monitor session 1 source interface vlan10|vlan20

monitor session 1 destination remote vlan xxx


In the core you configure the RSPAN VLAN as source and the physical interface to which the Voice Recorder is attached as the destination. Example:

vlan xxx

name RSPAN_VLAN

remote-span

exit

monitor session 1 source remote vlan xxx

monitor session 1 destination interface gig1/1


Make sure that VLANxxx is allowed on the trunk between edge switches and core switch.

Read more about SPAN and RSPAN here: http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_46_se/configuration/guide/swspan.html


Q. Will the voice recored server host port be a trunk port.

A: No. The port will be a SPAN destination port. See http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_46_se/configuration/guide/swspan.html#wp1036749 for details.


HTH.

Ingolf

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