xen-org/xen-api — pull request #788 by pauldu (2012-07-24 16:11:59+00:00)
Title: CA-80695: Remove setting of MTU in vif frontend area as Boston windows PV...

... drivers interpret it as maximum frame size.

The drivers will use their default in the absence of ths key, which is an *MTU* of 1500 rather than a frame size.