[Sip-implementors] Question about Record-Route

[Jinyan Su]

Hi, there,   I am reading the “new record-route text” at: http://lists.bell-labs.com/pipermail/sip/2000q4/004809.html   In the proxy behavior section, it talks about a recommended scheme that to add a record-route parameter to uniquely identify the proxy when the proxy inserts a Record-Route header into the request and removes that parameter in the corresponding 200-class response. This is used to identify which iteration of the spiral that it is in. I have a question about this scheme: When the request is being forwarded in a spiral way, the proxy might insert Record-Route in some of these iterations and might not do so in the others. In this case, the above scheme will be broken.   Is there any amendment to the above scheme or is there some other ways to enable modification of Record-Route headers in the response?   Thanks.   -Jinyan