"LARP" on Port 91 ?

[Russell A. Heise]

  guri at oakhill.UUCP (Gurvinder Singh Ahluwalia) writes:

  > Has anyone heard of a protocol called LARP?
  >
  > Context in which I have encountered this is IBMs Transparent Cluster
  > Facility (TCF) on the 4381 running VM/AIX. IBM indicates it employs
  > port  # 91.
  Yes, LARP stands for Locus Address Resolution Protocol.  LARP is used by
  TCF to 1)locate participating sites in the cluster; 2) translate site
  numbers into IP addresses; and, 3) determine the best IP route between
  various sites.

  > For those out there aware of this and also running cisco routers,
  > I would like to go a step further to find out compatibility of this
  > protocol on ciscos, including access/passage of LARP traffic through
  > cisc.o Is there something that has to be enabled to allow LARP through
  > cisco? What is the default?
  In our testing, I have found that Cisco routers will not pass LARP such
  that AIX/370 will accept it.  I have had to manually route to each site
  using "route add host ...".  I have found that "route add net ..." will
  not work.

 Russ Heise, AIX Technical Support, IBM
 rah at ibm.com