[SIPForum-discussion] Difference between stateless and statefulproxy in SIP protocol

[Ashish Mishra (ashismis)]

Ruben,

 

Stateless proxy does not remember anything once a request is forwarded.

Stateful proxy remembers the request until the transaction is over.

 

Benefits of stateful proxies are they are feature rich and useful for
getting billing info, existing session modification/negotiation etc.

B2B UA is transaction stateful proxy.

 

Second part, there is something MAX-FORWARDS in SIP header, which will
not allow more than 70 hops as per IETF recommendation.

So more than 68 proxies cannot forward request between A to B.

 

Hope that helps.

 

-          Ashish

 

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Ruben Roque
Sent: Tuesday, September 28, 2010 9:37 AM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] Difference between stateless and
statefulproxy in SIP protocol

 

 

Hi,

 

1) I want to know an example of a stateless proxy and a stateful proxy.
Is B2BUA a stateless or stateful proxy?

 

2) If a INVITE request is to be sent from user A to user B, but there
are 100 stateless proxies in path -- will the request be successfully
delivered to user B?

 

Thanks and Regards,

Reuben 

 

 

 

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