[cisco-voip] Jabber/CIPC and QoS

Wed Jan 4 11:27:26 EST 2017

I would have loved to do MTP resources across the board... helps with security as well, less holes to open up. But I found a few features that wouldn't work, like desktop sharing, etc. If they supported all features with MTP, I'd would have likely been able to justify a couple of routers to do it.

---
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: cisco-voip <cisco-voip-bounces at puck.nether.net> on behalf of Ben Amick <bamick at HumanArc.com>
Sent: Wednesday, January 4, 2017 11:18 AM
To: Evgeny Izetov; Ryan Huff
Cc: Cisco VoIP Group
Subject: Re: [cisco-voip] Jabber/CIPC and QoS

Evgeny,

That’s great, and I was able to find the PDF from the session but I can’t seem to remember how to find the site that has the recordings of the sessions – could you provide a link to that?

Ryan,

That sounds like a solid idea for when QoS is absolutely absolutely necessary, but I have nowhere near enough MTP resources to do that for all the softphones in my org.

Ben Amick

Telecom Analyst

From: Evgeny Izetov [mailto:eizetov at gmail.com]
Sent: Tuesday, January 03, 2017 10:15 PM
To: Ryan Huff <ryanhuff at outlook.com>
Cc: Ben Amick <bamick at HumanArc.com>; Cisco VoIP Group <cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] Jabber/CIPC and QoS

I saw a CiscoLive! session recently that seemed to recommend the ports and access-lists approach. The idea is that you can now specify separate port ranges for audio and video in SIP Profile. The session goes quite in depth and is worth the watch:

BRKCOL-2616 - QoS Strategies and Smart Media Techniques for Collaboration Deployments (2016 Berlin) - 2 Hours

On Tue, Jan 3, 2017 at 9:49 PM, Ryan Huff <ryanhuff at outlook.com<mailto:ryanhuff at outlook.com>> wrote:

I see; while this is by no means a complete solution, it may help. I'm assuming Cisco based soft phones (CIPC, CSF, BOT, TAB ... etc).

You may try Trusted Relay Points (set in the device level configuration). This does rely and depend on your media resource architecture and design; i.e. you'll need to have media resources that support TRP available.

Using TRP on the device config for a soft phone will cause CUCM to dynamically insert an MTP in the call flow which will allow for adherence to QOS trust policies and offer a predetermined network path for call flows in an otherwise untrusted network (presumably, the data network).

-Ryan

Sent from my iPhone

On Jan 3, 2017, at 9:30 PM, Ben Amick <bamick at HumanArc.com<mailto:bamick at HumanArc.com>> wrote:

Only for softphones. Currently most of our servers live on the same LAN as end users, so yeah. Hardphones have their own VLAN so its not as bad. In the future it won’t be that way but for the time being it is.

Ben Amick

Telecom Analyst

From: Ryan Huff [mailto:ryanhuff at outlook.com]
Sent: Tuesday, January 03, 2017 9:18 PM
To: Ben Amick <bamick at HumanArc.com<mailto:bamick at HumanArc.com>>
Cc: NateCCIE <nateccie at gmail.com<mailto:nateccie at gmail.com>>; Cisco VoIP Group <cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>>
Subject: Re: [cisco-voip] Jabber/CIPC and QoS

Ben,

By flat network; I am to assume that there is no layer 2 partition between rtp/signaling and general data traffic?

On Jan 3, 2017, at 9:15 PM, Ben Amick <bamick at HumanArc.com<mailto:bamick at HumanArc.com>> wrote:

Yeah, I have the luck of having MPLS right now, and I don’t see us going iWAN for a while for various reasons. QoS on the WAN right now even isn’t my issue, it’s QoS on the LAN. Right now we have a relatively flat network, and certain segments of our troupe *cough*developers*cough* seems to have made our internal traffic ugly, to the point that I may have to do an analysis of it, as we’re having just random periods here and there where calls just have horrible quality, of the type you normally see fixed by QoS

Ben Amick

Telecom Analyst

From: Ryan Huff [mailto:ryanhuff at outlook.com]
Sent: Tuesday, January 03, 2017 8:40 PM
To: NateCCIE <nateccie at gmail.com<mailto:nateccie at gmail.com>>
Cc: Ben Amick <bamick at HumanArc.com<mailto:bamick at HumanArc.com>>; Cisco VoIP Group <cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>>
Subject: Re: [cisco-voip] Jabber/CIPC and QoS

It's a shame really ... MPLS is far superior IMO, for many reasons. Call it iWAN, DMVPN, AutoVPN .... whatever, it is still as Nate says, public Internet.

Try getting a 30 or 60 minute SLA with escalation after 15 minutes from a public Comcast or Time Warner/Charter package.

On Jan 3, 2017, at 7:53 PM, NateCCIE <nateccie at gmail.com<mailto:nateccie at gmail.com>> wrote:

Or take the most approach of do nothing.

My personal favorite is to use codecs where QoS matters less, like iLBC, OPUS, etc.

So many business are getting rid of the QoS capable WAN and just doing VPNs, even if they have fancy names that make it sound better than public internet.

Sent from my iPhone

On Jan 3, 2017, at 2:25 PM, Ben Amick <bamick at HumanArc.com<mailto:bamick at HumanArc.com>> wrote:

So, I know this is an age old question that’s debated, but I’ve been wondering if anyone here has a perspective here in regards to QoS for softphones. Obviously, with hardphones, you usually partition a separate VLAN with AutoQoS/DSCP tags, but that isn’t applicable with softphones.

I’ve heard of three different options in the past, neither of which seem to be very simple to deploy, but all seem to be Jabber-centric.

1.      Configuring windows to perform DSCP tagging, and do DSCP QoS on the switches they are connected to, as well as trusting the device. Problems: Requires users to be local admins, openings for abuse and network impact due to blind PC trust.

2.      Configuring your switches with an access list that recognizes the ports Jabber does outbound to attach DSCP tags to them. Problems: Other programs could theoretically use those ports

3.      Installing Medianet services on all jabber clients; Configure all switches for medianet tagging. Problem: (I think?) Requires newer switches to use, maybe needs an additional server (I vaguely remember possibly needing prime collab?)?

Maybe I’m missing some things, but what approach have you guys taken for softphone/Jabber QoS? And on top of that, what options are there for CIPC (I know there’s the auto qos trust cisco-softphone for cisco switches, but I don’t believe there’s a solution other than #1 for non-cisco switches)?

Ben Amick

Telecom Analyst

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