ifconfig and trailers

Roland Schemers III schemers at vela.acs.oakland.edu
Wed Oct 17 07:28:10 AEST 1990


Hello! We are running Ultrix 4.0 on various machines:VAX 6000/310, 
DECsystem 5820, VAXstation 3100's, DECstation 3100's and DECstation 5000's. 
Someone suggested that we should have a -trailers option on our ifconfig 
command in rc.local. He said it ehances network performance.

Here is part of the man page on ifconfig:

          trailers  Enables the use of a trailer link level encapsulation
                    when sending.  This is the default.  If a network
                    interface supports trailers, the system, when possible,
                    encapsulates outgoing messages in a manner that minim-
                    izes the number of memory-to-memory copy operations
                    performed by the receiver.

          -trailers Disables the use of a trailer link level encapsulation.

By intuition it seems you would want trailers. Any comments?

Thanx, Roland
-- 
Roland J. Schemers III                              Systems Programmer 
schemers at vela.acs.oakland.edu (Ultrix)              Oakland University 
schemers at argo.acs.oakland.edu (VMS)                 Rochester, MI 48309-4401
"So what's your pointer?"                            (313)-370-4323



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