Dean,

Regarding
We also have a related operation:

4) Request redirection, which informs an upstream node about a new identity to target instead of the original.

Redirection does not always imply a new identity, it could be an alternative Contact for the same identity. The thing is that we cannot easily distinguish between these, since both use the same response code (302). So it can be either rerouting or retargeting. For the problem at hand this makes no difference though, in any case the request URI is replaced.

BTW what happened to the 'opaque' parameter solution that was part of a GRUU draft some versions ago? A special URI parameter that survives rerouting/retargeting would avoid introducing yet another identity header, and also detection-of-support issues.

Regards,
Jeroen



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