[cisco-voip] curious - no DNS SRV for SIP trunk to IM&P in HA

Tue Jun 21 18:05:44 EDT 2016

Did you test presence with the Publisher offline?

On Tue, Jun 21, 2016 at 2:11 PM, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:

>
> omg. this. if ever i thought nothing could drive me crazy like secondary
> line forwarding. but this sure did.
>
> it turns out there is an internal bug that prevents the dashboard from
> presenting the correct information. there is no way to be sure that the SRV
> records you entered are correct at all. and no real documentation to
> stipulate the actual correct syntax.
>
> the documentation team refused to say anything was wrong.
>
> the TAC engineer showed that things worked without it.
>
> I ended up setting it to the FQDN of the publisher to get rid of any
> errors.
>
> ug. leeeeeee.
>
> ---
> Lelio Fulgenzi, B.A.
> Senior Analyst, Network Infrastructure
> Computing and Communications Services (CCS)
> University of Guelph
>
> 519‐824‐4120 Ext 56354
> lelio at uoguelph.ca
> www.uoguelph.ca/ccs
> Room 037, Animal Science and Nutrition Building
> Guelph, Ontario, N1G 2W1
>
> ------------------------------
> *From: *"Anthony Holloway" <avholloway+cisco-voip at gmail.com>
> *To: *"Lelio Fulgenzi" <lelio at uoguelph.ca>
> *Cc: *"Brian Meade" <bmeade90 at vt.edu>, "Cisco VoIP Group" <
> cisco-voip at puck.nether.net>
> *Sent: *Tuesday, June 21, 2016 1:34:28 PM
>
> *Subject: *Re: [cisco-voip] curious - no DNS SRV for SIP trunk to IM&P in
> HA
>
> Resurrecting an old thread, because I hate when there's no closure to
> these topics.
>
> Whatever happened with your work on this?  Was the TAC engineer correct,
> or incorrect in his "you don't even need a presence gateway." statement?
>
> Is CUCM supposed to be configured in DNS as UDP or TCP?  There is
> conflicting documentation out in the wild.  You, Lelio, Linked to both.
>
> Lastly, I just had a TAC case where I had SRV setup and it was working,
> and then all of the sudden it stopped working, so the TAC engineer just
> changed my entries back from SRV to straight up IP and it starting working
> again.  No explanation of why SRV's were failing.
>
> I'm inclined to think that the solution doesn't get enough visibility to
> have anyone care enough to truly figure it out or fix it.  Well, I'm trying
> to draw attention to it now.
>
>
>
> On Wed, Jan 20, 2016 at 12:01 PM, Lelio Fulgenzi <lelio at uoguelph.ca>
> wrote:
>
>>
>> So I've tried to get DNS SRV working on IM&P, namely the Presence Gateway
>> configuration, so the DNS SRV record for the callmanager subscribers I want
>> to use.
>>
>> It's not working. All attempts at research show that I should be able to
>> do this:
>>
>> http://benmorgan.com.au/blog/cucm-and-imp-integration-with-srv-records/
>>
>> http://www.netcraftsmen.com/using-dns-srv-records-for-cisco-cucm-and-cups/
>>
>>
>> http://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-im-presence-service/118590-config-cucm-00.html
>>
>> So I opened a case with the TAC to get some help.
>>
>> The TAC engineer has basically said, it's not even needed for the latest
>> versions of IM&P it was for old CUPS versions. He said to simply point
>> to my publisher.
>>
>> He showed me on his lab that he had no presence gateway configured at
>> all, but yet, presence was updated on his jabber client.
>>
>> I'm flabbergasted.
>>
>> Are other people not using DNS SRV records for their Presence Gateway
>> configuration at all?
>>
>> VERY weird.
>>
>> Lelio
>>
>>
>> ---
>> Lelio Fulgenzi, B.A.
>> Senior Analyst, Network Infrastructure
>> Computing and Communications Services (CCS)
>> University of Guelph
>>
>> 519‐824‐4120 Ext 56354
>> lelio at uoguelph.ca
>> www.uoguelph.ca/ccs
>> Room 037, Animal Science and Nutrition Building
>> Guelph, Ontario, N1G 2W1
>>
>> ------------------------------
>> *From: *"Lelio Fulgenzi" <lelio at uoguelph.ca>
>> *To: *"Brian Meade" <bmeade90 at vt.edu>
>> *Cc: *"Cisco VoIP Group" <cisco-voip at puck.nether.net>
>> *Sent: *Tuesday, January 19, 2016 10:24:08 AM
>>
>> *Subject: *Re: [cisco-voip] curious - no DNS SRV for SIP trunk to IM&P
>> in HA
>>
>>
>> OK. Great.
>>
>> I'm just going through the process of setting up the SRV record instead
>> of FQDN of callmanager on my lab cluster and it's not working. :(
>>
>> Will need to review...
>>
>> I'm using this as a guide, even though it's v11.
>>
>>
>> http://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-im-presence-service/118590-config-cucm-00.html
>>
>> ---
>> Lelio Fulgenzi, B.A.
>> Senior Analyst, Network Infrastructure
>> Computing and Communications Services (CCS)
>> University of Guelph
>>
>> 519‐824‐4120 Ext 56354
>> lelio at uoguelph.ca
>> www.uoguelph.ca/ccs
>> Room 037, Animal Science and Nutrition Building
>> Guelph, Ontario, N1G 2W1
>>
>> ------------------------------
>> *From: *"Brian Meade" <bmeade90 at vt.edu>
>> *To: *"Lelio Fulgenzi" <lelio at uoguelph.ca>
>> *Cc: *"Cisco VoIP Group" <cisco-voip at puck.nether.net>
>> *Sent: *Tuesday, January 19, 2016 10:15:44 AM
>> *Subject: *Re: [cisco-voip] curious - no DNS SRV for SIP trunk to IM&P
>> in HA
>>
>> Yea, you would need your SRV to match the CM Group for the device pool.
>> Or just choose run on all active nodes.  Main ramification of that is
>> making sure the other side can accept SIP messages from any of the nodes.
>>
>>
>> On Tue, Jan 19, 2016 at 9:15 AM, Lelio Fulgenzi <lelio at uoguelph.ca>
>> wrote:
>>
>>>
>>> Thanks Brian.
>>>
>>> I had to read the bug twice. It's the troubleshooter on CUPS, but it's
>>> testing what's configured on CUCM by the sounds of it.
>>>
>>> I think I will play it safe and use IP addresses on the CUCM
>>> configuration pointing to the HA CUPS pair. And on the CUPS server, I will
>>> go ahead an use an SRV record since I want to be able to point to more than
>>> one CUCM server.
>>>
>>> Another question arises though. I remember when playing with
>>> intercluster trunks, it had to be fully meshed, so all trunk members on one
>>> cluster had to point to all members on the other cluster, or calls would
>>> fail.
>>>
>>> Does a SIP trunk have to be fully meshed as well?
>>>
>>> For example, if the device pool of the SIP trunk includes subA, subB and
>>> subC, do I have to make sure that the SRV records I'm using on the CUPS
>>> server have those three servers included?
>>>
>>> I was also considering checking off "make active on all nodes" - but I'm
>>> not sure of the ramifications of that. I'd have to probably write the SRV
>>> record properly so that the publisher is (never) used or used only as a
>>> last resort.
>>>
>>> Thanks!
>>>
>>>
>>>
>>> ---
>>> Lelio Fulgenzi, B.A.
>>> Senior Analyst, Network Infrastructure
>>> Computing and Communications Services (CCS)
>>> University of Guelph
>>>
>>> 519‐824‐4120 Ext 56354
>>> lelio at uoguelph.ca
>>> www.uoguelph.ca/ccs
>>> Room 037, Animal Science and Nutrition Building
>>> Guelph, Ontario, N1G 2W1
>>>
>>> ------------------------------
>>> *From: *"Brian Meade" <bmeade90 at vt.edu>
>>> *To: *"Lelio Fulgenzi" <lelio at uoguelph.ca>
>>> *Cc: *"Cisco VoIP Group" <cisco-voip at puck.nether.net>
>>> *Sent: *Monday, January 18, 2016 4:56:18 PM
>>> *Subject: *Re: [cisco-voip] curious - no DNS SRV for SIP trunk to IM&P
>>> in HA
>>>
>>>
>>> Looks like it may just be the CUPS Troubleshooter Tool doesn't know how
>>> to handle it- https://tools.cisco.com/bugsearch/bug/CSCue72366
>>>
>>> So it looks like it will work as an SRV but may fail in the
>>> troubleshooting tool.  It looks like this was because IM&P/CUPS disn't
>>> support resolving SRVs until recently-
>>> https://tools.cisco.com/bugsearch/bug/CSCui67346
>>>
>>> On Mon, Jan 18, 2016 at 3:47 PM, Lelio Fulgenzi <lelio at uoguelph.ca>
>>> wrote:
>>>
>>>>
>>>> Just reading through some documentation (see link below) and it states
>>>> that when configuring the SIP trunk from CUCM to the IM&P cluster, I can
>>>> not use DNS SRV records if I'm using HA. Tells you to use IP address or
>>>> FQDN.
>>>>
>>>> Just wondering what others have thought about this. I'll go ahead and
>>>> use IP address, but it struck me as odd.
>>>>
>>>>
>>>>
>>>> http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/im_presence/configAdminGuide/9_1/CUP0_BK_C68AA046_00_config-admin-guide-imp-91/CUP0_BK_C68AA046_00_config-admin-guide-imp-91_chapter_0101.html#CUP0_TP_SBE6AFC1_00
>>>>
>>>> ---
>>>> Lelio Fulgenzi, B.A.
>>>> Senior Analyst, Network Infrastructure
>>>> Computing and Communications Services (CCS)
>>>> University of Guelph
>>>>
>>>> 519‐824‐4120 Ext 56354
>>>> lelio at uoguelph.ca
>>>> www.uoguelph.ca/ccs
>>>> Room 037, Animal Science and Nutrition Building
>>>> Guelph, Ontario, N1G 2W1
>>>>
>>>>
>>>> _______________________________________________
>>>> cisco-voip mailing list
>>>> cisco-voip at puck.nether.net
>>>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>>>
>>>>
>>>
>>>
>>> _______________________________________________
>>> cisco-voip mailing list
>>> cisco-voip at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>>
>>>
>>
>>
>> _______________________________________________
>> cisco-voip mailing list
>> cisco-voip at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>
>>
>> _______________________________________________
>> cisco-voip mailing list
>> cisco-voip at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20160621/70a569aa/attachment.html>