Has anyone used a snapmirror destination as the source for another snapmirror going to another destination. An example would be Volume A is being snapmirrored from Site A to Site B. Volume A on Site B is then being snapmirrored to Site C. This is being done because the bandwidth at Site A is limited and we do not want to run a Snapmirror from Site A to Site B and Site A to Site C. I have not found to much information on this. The snapmirrors use the same volume signatures with different time stamps. Normally you would have 2 different volume signatures snapmirroring from a single site to 2 separate locations. It works but it makes me uncomfortable doing it.
This can be done through the CLI. It can't be done through the QUI. Also only 2 hops as you have described is supported. So the easiest way would be to snapmirror A to B through system manager. Then use the snapmirror create command from location C.