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The HP Community is where owners of HP products, like you, volunteer to help each other find solutions.
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Hello,

I am having difficulties getting Multicast paging to work when more than 1 hop (router) is in play. I have 2 routers depoloyed using the same subnet, with polycom phones behind nat. I currently have the routers plugged in back-to-back to simulate 1 LAN. The routers are setup to listen for multicast routing between eachother. After working with my router vendor they mentioned i need to ensure my polycom phones are setup for more than 1 TTL when multicast paging otherwise my setup will not work. This is the only setting that i have not checked. How do i go about verifying the Time-to-live for mutlicast paging on VVX series phones?

 

Thanks,

 

Caleb

4 REPLIES 4
HP Recommended

forgot to mention... Our phones are running version 5.2.2.0501.

HP Recommended

I would personally first do a packets capture using port mirroring on a switch or directly in the first router if available to check the TTL value of the packet.

HP Recommended

Hello Caleb and all,

welcome to the Polycom Community.

The PTT or Paging Multicast has a TTL of 64:

 

image

Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier

Polycom Global Services

------------------------------------------------
Notice: I am an HP Poly employee but all replies within the community are done as a volunteer outside of my day role. This community forum is not an official HP Poly support resource, thus responses from HP Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
If you need immediate and/or official assistance for former Poly\Plantronics\Polycom please open a service ticket through your support channels
For HP products please check HP Support.

Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN
HP Recommended

Thanks Steffen! I found a configuration error on my Adtran routers (once i fixed the error, paging worked fine). Glad to find out that the TTL for multicast paging is 64 though as this will be helpful for multicast routing between subnets.

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