[cisco-voip] Remote office phone connectivity

[Wes Sisk]

Hi Vandy,

Use a tool such as ttcp or wsttcp to setup streams between the sites.  
Then examine your service policies on your router interfaces to 
determine what is/is not working properly.  Perhaps your SMTP traffic is 
getting DSCP or TOS modified so it is classified as voice control traffic?

Clarify the src/dest, TOS, and DSCP of traffic leaving you Exg server, 
then check your service policies on your routers to see how that traffic 
should be governed and check for matches.  Use the tool to re-simulate 
the storm and isolate the condition.

/Wes

Vandy Hamidi wrote:

> Just checked it.  All coming in routine:
>
>  
>
> Extended IP access list DISCOVER
>
>     1 permit tcp any any eq smtp precedence routine (21 matches)
>
>     2 permit tcp any any eq smtp precedence priority
>
>     3 permit tcp any any eq smtp precedence immediate
>
>     4 permit tcp any any eq smtp precedence flash
>
>     5 permit tcp any any eq smtp precedence flash-override
>
>     6 permit tcp any any eq smtp precedence critical
>
>     7 permit tcp any any eq smtp precedence internet
>
>     8 permit tcp any any eq smtp precedence network
>
>  
>
>  
>
> ------------------------------------------------------------------------
>
> *From:* Voll, Scott [mailto:Scott.Voll at wesd.org]
> *Sent:* Wednesday, January 05, 2005 3:00 PM
> *To:* Vandy Hamidi
> *Cc:* cisco-voip at puck.nether.net
> *Subject:* RE: [cisco-voip] Remote office phone connectivity
>
>  
>
> Could the mail server be marking your smtp traffic?
>
>  
>
>  
>
> ------------------------------------------------------------------------
>
> *From:* cisco-voip-bounces at puck.nether.net 
> [mailto:cisco-voip-bounces at puck.nether.net] *On Behalf Of *Vandy Hamidi
> *Sent:* Wednesday, January 05, 2005 2:54 PM
> *To:* cisco-voip at puck.nether.net
> *Subject:* [cisco-voip] Remote office phone connectivity
> *Importance:* High
>
>  
>
> HELP!
>
> I need some QOS and VOICE experts here.
>
> I just got done putting out a major fire.
>
> Our mail server in our Hub office (CALLMANAGER LOCATION) started 
> sending out MASSIVE amounts of email to our remote offices.  Bandwidth 
> consumption on the WAN links between the HUB and remote offices shot 
> up to 99.9%/7%.
>
> Our remote users had complaints of phones rebooting, calls not going 
> through or being dropped, not being able to make outbound calls 
> (through their local PRI), but I could call them and talk w/o any problem.
>
> I don't understand.  I do have QOS setup Prioritizing VOICE and VOICE 
> Control packets and I'm sure it's right (see QOS config below)
>
> I throttled SMTP at my hub router and all the phones started working fine.
>
> I've maxed out the interface in the past and tested the phone w/o any 
> problem.
>
> All ideas and suggestions are welcome.  Thanks!
>
>         -=Vandy=-
>
>  
>
> class-map match-all VOICE_CONTROL
>
>   match access-group name VOICE_CONTROL
>
> class-map match-all VOICE
>
>   match access-group name VOICE
>
> policy-map QOS-POLICY-T3-01
>
>   class VOICE
>
>    priority 600
>
>   class VOICE_CONTROL
>
>    bandwidth 50
>
>   class class-default
>
>    fair-queue
>
>    set precedence 0
>
> ip access-list extended VOICE
>
>  permit ip any any precedence critical
>
>  permit ip any any dscp ef
>
> ip access-list extended VOICE_CONTROL
>
>  permit ip any any precedence flash
>
>  permit ip any any dscp af31
>
>------------------------------------------------------------------------
>
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>