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

[Ki Wi]

Hi Leslie,
thanks. It seems like what the author do is to dump all the voice traffic
from voice vlan into the rspan vlan.

I'm actually wondering by mirroring traffic from just ip phones, will the
voice recorder works? (without mirroring traffic from voice gateway and
cucm)


On Thu, Dec 29, 2011 at 12:32 AM, Leslie Meade
<lmeade at salientnetworks.com>wrote:

> I found this blog a source of good information about span etc
>
> http://packetpushers.net/rspan-over-l2tpv3-is-that-even-possible/
>
>
>
> Salient Service
> 760.930.2636, support at salientnetworks.com
> Request Line (moves adds and changes only)
> 760.930.2699, macs at salientnetworks.com
>
> From: Ki Wi <kiwi.voice at gmail.com>
> Date: Thu, 29 Dec 2011 00:21:29 +0800
> To: "Buchanan, James" <jbuchanan at presidio.com>
> Cc: Cisco VoIP List <cisco-voip at puck.nether.net>
>
> Subject: Re: [cisco-voip] How does voice recorder works? Do I need RSPAN
> or ERSPAN?
>
> It's by nexlabs. A local product in my country.
>
> On Thu, Dec 29, 2011 at 12:02 AM, Buchanan, James <jbuchanan at presidio.com>wrote:
>
>> What product are you using?****
>>
>> ** **
>>
>> *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:* Wednesday, December 28, 2011 6:29 AM
>> *To:* Cisco VoIP List
>>
>> *Subject:* Re: [cisco-voip] How does voice recorder works? Do I need
>> RSPAN or ERSPAN?****
>>
>> ** **
>>
>> 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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