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New Member

IP Phones showing "High Traffic Try Again Later"

Last night we configured Auto QoS Voice on our switches. For most of the day everything was fine, but a little after noon some phones within the network were showing "High Traffic Try Again Later". The CUCM is local to the phone in the same VLAN.

Could the QoS config cause this error?

Sachin

Everyone's tags (2)
12 REPLIES
Hall of Fame Super Silver

IP Phones showing "High Traffic Try Again Later"

Check CPU utilization on CUCM server, that's most likely the culprit.

HTH,

Chris

New Member

IP Phones showing "High Traffic Try Again Later"

Thank you for your reply Chris.

I'm not in a position to check that now, but wouldn't that affect all phones, not just some? I'm a Network engineer and not a VoIP engineer, so pardon my ignorance.

I just thought that it was a huge coincidence that the error came up the day after we configured QoS.

Sachin

Cisco Employee

IP Phones showing "High Traffic Try Again Later"

looks like the QOS configuration is messing up the voice traffic!!

New Member

IP Phones showing "High Traffic Try Again Later"

That is what I am trying to figure out. I am not seeing any evidence of the QoS affecting the network traffic. All traffic the phones are within the network. I see no excessive drops on ports and the QoS WAN policies did not come into effect during the time the issue was encountered.

I'm basically stumped.

Sachin

Cisco Employee

IP Phones showing "High Traffic Try Again Later"

While such error is displayed on phones, Where are they calling to ? PSTN, another site users or same site users ?

If Another site, then bandwidth allocated between 2 sites must have been exhausted ( check location setting for BW allocation ). Is AAR configured whenever bandwidth between 2 sites gets exhausted ?

GP.

Pls rate helpful posts !!

New Member

IP Phones showing "High Traffic Try Again Later"

I'll have to check those details and get back to you.

As far as I know, AAR is not configured. When you say that bandwidth is exhausted, is this a setting in call manager, or based on the network?

I'm really trying to asertain whether the QoS changes we made is causing it, or whether we should be looking at something else.

Sachin

Cisco Employee

Re: IP Phones showing "High Traffic Try Again Later"

sganpat wrote:

As far as I know, AAR is not configured. When you say that bandwidth is exhausted, is this a setting in call manager, or based on the network?

As mentioned earlier, check how much bandwidth is configured for inter-site communication in Location setting of your CUCM ( for those 2 sites ). Then check which codec will be used for calls between those 2 sites ( check region setting in your CUCM ). This should tell you how many calls are allowed between 2 sites & if users are trying to make calls over & above the capacity & facing the error.

All of above applies only if users are facing error while making calls across the site, which you need to still confirm.


GP.

Pls rate helpful posts !!

New Member

Hi, i would like to know what

Hi, i would like to know what did you do to fix this issue. Because I have the same message on ipphones making calls to PSTN. Did you restart the call manager service?

Re: IP Phones showing "High Traffic Try Again Later"

here s a link that explains this and offers a work around

http://www.cisco.com/en/US/products/hw/phones/ps379/products_tech_note09186a008091c1dc.shtml

Sent from Cisco Technical Support iPhone App

Please remember to rate useful posts, by clicking on the stars below.

Hall of Fame Super Silver

IP Phones showing "High Traffic Try Again Later"

Also, if you search this forum for "High Traffic Try Again Later" you will find quite a few threads, as I stated in my original thread check your CPU utilization.  Also, what QoS configuration did you apply to the switchports the CUCM servers plug into? Are you trusting all DSCP values and not policing any traffic?

HTH,

Chris

IP Phones showing "High Traffic Try Again Later"

Solution:

   Restart the Call Manager service on all utilized CM Subscribers

Good Luck

New Member

IP Phones showing "High Traffic Try Again Later"

Check CPU utilization on CUCM server, that's most likely the culprit. CUCM need to be restarted. as soon as you restart the system it will come up.

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