Running Voice traffic over GRE Tunnels

Unanswered Question
Apr 7th, 2010

Hello All,

Can someone please tell me drawbacks of GRE Tunnel.
Due to some reason i am planning to route my voice traffic over GRE tunnels..inside GRE tunnel will pull route from OSPF..will there be any limitations / issue for voice.

Please revert
Thanks in Advance


Regards
Yogesh Suryawanshi
Mumbai

I have this problem too.
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Federico Coto F... Wed, 04/07/2010 - 19:58

Hi,

I don't see any issues on routing voice traffic over GRE tunnels aside from any issues on running voice over any IP network.

You need QoS to prioritize the voice over other bandwidth-consuming traffic, and give it a special treatment since voice cannot tolerate network-related delays or jitter.

Also, GRE being a tunneling protocol, adds overhead to the voice packets, so keep that in mind when setting the MTU.

To secure the voice, you can use IPsec/GRE to encrypt and protect the traffic, but it has the drawback that it allows more overhead.

A lot of things depends on what you need.

Federico.

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