[cisco-voip] How does voice recorder works? Do I need RSPAN or ERSPAN?

[Ki Wi]

Anyone have any idea on this?

On Tue, Dec 27, 2011 at 2:56 PM, Ki Wi <kiwi.voice at gmail.com> wrote:

> Hi Dennis/James,
> Thanks for the quick reply.
>
> The product that the customer have actually works for port mirror
> scenarios. I'm aware that those products are actually looking for SCCP
> messages during their capture. However, I'm wondering is the SCCP messages
> from the phone port (will see both tx/rx packets to the phone) sufficient ?
> Or do I need to span extra signalling messages from CUCM and as well as
> those extra rtp stream from voice gateway?
>
> Currently, my best practise is i will span all the rx traffic into the
> voice vlan (ingress traffic into switchport) and rspan it to the recorder.
> However, now i'm hoping that I can simply sniff both tx/rx packets on the
> few IP phones that requires recording.
>
> *imaging the site have 2000 phones and i only need to record 5 ip phones
> conversation in the network, the software vendor is worried about the cpu
> utilization as well if we were to enable span traffic everywhere*
>
>
>
>
> On Tue, Dec 27, 2011 at 2:21 PM, Dennis Heim <Dennis.Heim at cdw.com> wrote:
>
>>  Many of the products offer either one of the following or a combination
>> of the above: (1)Port Mirroring (2) Built-In Bridge (BiB) (3) Software on
>> PC. You also need to determine if you need to record all calls, external
>> only, internal only, etc.****
>>
>> ** **
>>
>> Dennis Heim
>> Senior Engineer (Unified Communications)
>> CDW  Advanced Technology Services
>> 10610 9th Place
>> Bellevue, WA 98004
>>
>> 425.310.5299 Single Number Reach (WA)****
>>
>> 317.569.4255 Single Number Reach (IN)
>> 317.569.4201 Fax
>> dennis.heim at cdw.com*
>> *cdw.com/content/solutions/unified-communications/<http://www.cdw.com/content/solutions/unified-communications/>
>> ****
>>
>> ** **
>>
>> *From:* cisco-voip-bounces at puck.nether.net [mailto:
>> cisco-voip-bounces at puck.nether.net] *On Behalf Of *Buchanan, James
>> *Sent:* Tuesday, December 27, 2011 12:07 AM
>> *To:* Ki Wi; Cisco VoIP List
>> *Subject:* Re: [cisco-voip] How does voice recorder works? Do I need
>> RSPAN or ERSPAN?****
>>
>> ** **
>>
>> Depends on the voice recording product you are using. The newer ones
>> don’t require SPAN at all in many cases.****
>>
>> ** **
>>
>> *James Buchanan*|* UC Technology Manager *| *Presidio South *|*Presidio Networked Solutions
>> *****
>>
>> *12 Cadillac Dr Ste 130 Brentwood, TN 37027 *|* **jbuchanan at presidio.com*
>> **
>>
>> *D: 615-866-5729* | *F:615-866-5781*  *www.presidio.com*<http://www.presidio.com/>
>> ****
>>
>> ** **
>>
>> *From:* cisco-voip-bounces at puck.nether.net
>> [mailto:cisco-voip-bounces at puck.nether.net] *On Behalf Of *Ki Wi
>> *Sent:* Monday, December 26, 2011 10:44 PM
>> *To:* Cisco VoIP List
>> *Subject:* [cisco-voip] How does voice recorder works? Do I need RSPAN
>> or ERSPAN?****
>>
>> ** **
>>
>> I have a setup with 2 DC . There's couple of voice gateway and cucm in
>> each DC.
>>
>> There's a couple of distribution switches as well.
>>
>> Between 2 DC and distribution switches are all L3.
>>
>> Today, my requirement is only to span a few ports connected to the access
>> switches of distribution switch "A". If I do a rspan from those IP phones
>> back to distribution switch "A" and I will connect the voice recorder to
>> distribution switch "A", will it work?
>>
>> Is it neccessary for me to span the traffic from cucm and voice gateway
>> as well? If so, ERSPAN is required. ****
>>
>
>
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