Hello,
Got a serious issue with RTP traffic bringing down a network which I need to get sorted ASAP!.
Setup is as follows:
Draytek Vigor2927 at site 1, linked to another Draytek Vigor2927 at site 2 via a LAN to LAN IPsec VPN. VPN is working as it should and both sites have strong internet connections.
Need to transfer streaming audio from site 1 to site 2. This is done with a hardware IP audio codec that sends the data to another IP audio codec (decoder). Audio data transfer is via the RTP protocol at around 1.5mbps - well within the capabilities of the internet and VPN connections.
Within a few seconds of the IP audio codecs turning on and transferring data, the Vigor 2927's lockup and ALL lan and WAN traffic stops. Basically, the 2927 is killed by this RTP data transfer, as if it is getting "swamped" just like a DoS attack.
Testing both the encoder and decoder at the same site on the same LAN, all is ok. So basically it appears that the VPN is the issue? What is most concerning however, is the fact that the Vigor2927 can be brought to its knees like this - no good for a critical network environment!!
I have checked and run through settings, including the firewall, but to no avail.
Any ideas? Don't want to have to rip these new 2927's out if I can help it!
Thanks!
