> Hi Robert > > Am I right to assume that media will flow directly > between end points if the end points are within one VPN even > if they are dispersed.
Yes, so long as all the IP subnets that compose your VPN network are configured in the "System->Internet Calling" page. This essentially teaches the NAT traversal feature which addresses it can consider as 'local' and therefore do not require media anchoring. > > VPN seems to me to be the only NAT traversal that allows > media to flow directly between UA in all scenarios. Not the only one but I would consider it the safest way. An alternative would be to have each remote site equipped with SIP-aware NAT/Firewalls such as the Intertex IX67 or an InGate box. > > Please confirm. > > Charles > > -----Original Message----- > From: Robert Joly [mailto:[EMAIL PROTECTED] > Sent: Monday, September 08, 2008 8:31 AM > To: [EMAIL PROTECTED]; [email protected] > Subject: RE: [sipx-users] SIPX 4.0 NAT traversal > > > please hep me understand how far end NAT traversal solution planned > > for V4.0 will work. > > > > I would like to understand if media packets will pass > through SIPX in > > the scenario where communicating UA are both remotely registered. > > Similar to what the InGate does, media sessions between > endpoints that are separated by NATs will see their media > 'commute' through sipXecs. > That media 'anchoring' at the sipXecs in the only reliable > way of overcoming all types of NATs. > > > > > > In the scenario I am thinking of, SIPX 4.0 (when it is ready and > > stable!) is deployed in a data centre to serve a multi site > > organization with remote (work from home) and mobile (road warrior) > > workers. Lets say 2 employees' UA (one at home and another > in a hotel) > > are both registered on SIPX 4.0 and using the remote far end NAT > > traversal solution planned and have an established call. Will the > > media in such a call flow directly between the UA as in > conventional > > SIP calls. > > The media will be from UA1<--->media relay running on sipXecs<--->UA2. > If both UAs are in the same remote location then the choice > of 'anchoring' the media at the sipXecs is configurable. If > the NAT Traversal feature is set in 'aggressive' mode then a > media relay will be used to anchor the media. If the mode is > set to 'conservative' then the UAs will be instructed to > stream to each other directly. > > > > > I am trying to get a feel for traffic handling if the > future version > > of SIPX is deployed in a scenario similar to the one that I > describe; > > a virtual work place where everyone works remotely. > > The rule of thumb is that if there is one or more NATs > between the caller and the callee then the sipXecs will > anchor the media. Again, that anchoring technique is the > only way to overcome all the types of NATs out there. > > > > > Charles Mutunga > > > > _______________________________________________ sipx-users mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-users Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users
