Matthew here's a little info on the ports used in h323: To set up a voice connection, the initiator starts a H.225 connection over TCP to the destination entity (normally the gatekeeper) at port number 1720. In this session a port number for the following H.245 connection is exchanged. The initiator opens in the next step a H.245 connection to the gatekeeper over TCP (ephemeral port), in which ports for the actual voice traffic between two H.323 terminals are exchanged. While the H.225 connection could be torn down after the H.245 ports have been exchanged, it will in practice stay up until the call is over. The gatekeeper itself will also open connections to the terminating H.323 terminal in order to be able to negotiate the ports that should be used between the initiating and the terminating H.323 terminal. Other TCP ports used for RAS services are 1718 (H.323 gatekeeper discovery) and 1719 (H.323 gatekeeper registration and status).
regards Pat ""Matthew Webster"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hi all, > > I am a recent CCNA graduate, and am about to tackle the challenges of the > CCNP Routing 2.0 exam. Look forward to asking/providing help where possible! > > Anyway, I have a question - does anyone know the ITU spec, or RFC that deals > with TCP ports for H.225 RAS messages. I know that port 1719 is used for > ARQ's and ARC's, but am not sure what port 1720 is used for...here is part > of the Etherpeek trace: > > TCP - Transport Control Protocol > Source Port: 64642 > Destination Port: 1720 RAS Transport Layer Service Access Point > > can anyone help? > > cheers, > Matthew. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=21546&t=21519 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
