h323 and nat

[a.diot]

hi all ,

i'm performing h323 video conf with polycom solution (PVX and Ipower)(one endpoint on private lan one endpoint on internet)

between ipower and pvx all works fine ,between pvx and pvx video works but i can't use h239 PVX option.

it looks like a nat issue does anybody still experience that ??

Is H239 well supported by nat ??

Thanks

[mmelbourne]

I think H.239 was introduced in H.323v5, and certainly the PIX only supports H.323v4. H.239 (Dual Video) is not supported on an IP-IP Gateway yet either.

[a.diot]

thanks for answering ,

i made some etherreal capture and when h239 is activated on pvx the ios firewall (nat) is enable to locate the ip adress in payload

(all works fine if h239 isn't activared)

So the pvx sends its video stream to private ip address.

H239 isn't supported by nat on 12.4(2)T advanced ip