An idea just popped into my head. What if you used outbound fast start? What is the well known bug? And what service parameter? “The workaround, if memory serves, is to set the service parameter mentioned above to g729”
From: Brett [mailto:brett.sal...@gmail.com] Sent: Wednesday, October 21, 2009 9:08 PM To: Michael Ciarfello Cc: Mark Snow; ccie_voice@onlinestudylist.com; Dave Wong Subject: Re: [OSL | CCIE_Voice] Gatekeeper bandwidth question Mark - No critical intentions inferred :) Simply that, and to add to Michael's reply inline, if you absolutely positively have an 'everywhere' g711 region than you most likely undid your 'everywhere' g729 region in the process. I had this same issue occur with three different customers over the last 2 months and everytime it was a region issue; however, none of them were running 7.0 code. And being in the field more than the lab, I forget about lab specific code. So, if we're indeed running 7.0 code (Dave?) as the blueprint dictates then you may be hitting a well known bug, assuming our regions are spot on, wherein the ARQ neglects the region pairings and lets the IntraRegion Audio Default codec Service Parameter override its decision thereby requesting 1280 up front, since if you haven't messed with this service parameter it defaults to g711. Without the BRQ Enabled param enabled the sh gatek calls will report 128k, but both endpoints will claim g729. With it enabled, of course you'll see a BRQ in the h225 asn1 debug and sh gatek calls will then display 16k. Not a big deal as long we don't introduce session bandwidth limits that don't account for that extra 1280 ARQ. The workaround, if memory serves, is to set the service parameter mentioned above to g729 after which you should see the initial ARQ on the HQ side be 160 (or upgrade to a fixed version :) hth, Brett On Wed, Oct 21, 2009 at 8:58 AM, Michael Ciarfello <mciarfe...@iplogic.com<mailto:mciarfe...@iplogic.com>> wrote: If you put the GK-Trunk in a g729 only DP/region then the “it should work this way” should be a non-issue since all calls will be g729 over the GK for the original question? I think that’s what he’s getting at. And I think that is a correct statement. What if the GK trunk has MTP checked and the MTP is in a G711 only region or is getting selected as g711 because of a misconfiguration on a phone, etc? Or if the MTPs are not in any MRG so are trying to use the default. So many combinations. You have to get basic scenarios working first. Document it FULLY. Do more scenarios, document it fully, do more scenarios etc, etc ,etc. Until the experience level is comfortable enough for you. Because of all the possible call scenario types that can be asked, I think there is always a degree of playing around with settings (MTP, xcoder, fast-start, etc) but the experience and configuration confidence should greatly reduce the play around time. From: ccie_voice-boun...@onlinestudylist.com<mailto:ccie_voice-boun...@onlinestudylist.com> [mailto:ccie_voice-boun...@onlinestudylist.com<mailto:ccie_voice-boun...@onlinestudylist.com>] On Behalf Of Mark Snow Sent: Wednesday, October 21, 2009 11:44 AM To: Brett Cc: ccie_voice@onlinestudylist.com<mailto:ccie_voice@onlinestudylist.com>; Dave Wong Subject: Re: [OSL | CCIE_Voice] Gatekeeper bandwidth question Not trying to be critical, only curious - where are you going with that question? Just trying to understand the relevance provided that the this H225 GK-Controlled Trunk and the HQ Phone are both in different Regions, and that the matrix between those regions is G729. Only asking because maybe you have a thought process I haven't thought of yet :) Dave - can you in fact real quick confirm (by way of a quick table below) what *all* Regions you have defined in CUCM, and then specifically what Region you have applied to your HQ Phone and what Region you have applied to your H225-Trunk to HQ-GK, and the matrix'd BW/Codec between them? Cheers, -- Mark Snow CCIE #14073 (Voice, Security) Senior Technical Instructor - IPexpert, Inc. Telephone: +1.810.326.1444 Fax: +1.309.413.4097 Mailto: ms...@ipexpert.com<mailto:ms...@ipexpert.com> -- Join our free online support and peer group communities: http://www.IPexpert.com/communities<http://www.ipexpert.com/communities> -- IPexpert - The Global Leader in Self-Study, Classroom-Based, Video-On-Demand and Audio Certification Training Tools for the Cisco CCIE R&S Lab, CCIE Security Lab, CCIE Service Provider Lab , CCIE Voice Lab and CCIE Storage Lab Certifications. -- On Oct 21, 2009, at 10:43 AM, Brett wrote: Do you have any regions defined that are g711 everywhere? On Wed, Oct 21, 2009 at 5:17 AM, Dave Wong <dwch...@gmail.com<mailto:dwch...@gmail.com>> wrote: Hi all Here's the debug h225 asn1 on the HQ GK and PSTN GK. The first set of debugs is taken when PSTN GK calls HQ GK and the second set of debugs is for a call the other way round. It clearly shows that a bandwidth of 128K is requested on the HQ GK probably by CUCM when PSTN calls HQ, but "show gatekeeper calls" show 16K. When HQ calls PSTN, the bandwidth requested was 16K.
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