[e2e] MTU of a loopback interface?

Jeffrey A. Six six at mail.eecis.udel.edu
Thu May 3 12:30:25 PDT 2001


Me and a colleague have been having a discussion about why loopback
interfaces have an MTU.  Is this done for any particular reason?  If the
data being send/received is never actually put on the wire (or other
physical layer), why does the link layer provide a link layer MTU?  I fail
to see a reason for this.  Also, if there is such a MTU, how is the value
determined?  Is this just an implementation issue for those implementing the
loopback interface code?  What design criteria would go into this


Jeffrey A. Six
University of Delaware                jeffsix at udel.edu
Computer & Information Sciences       http://www.eecis.udel.edu/~six
Electrical & Computer Engineering

"I build circuits everyday.  I don't know how they work, but. . ."

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