Do RIP and IGRP disable split horizon in a frame relay
hub and spoke topology?
I have one source that says both do, one that says
only RIP and one that says only IGRP. What is the
real answer?
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Split horizon is disabled by default on a Frame point-to-point
interfaces/sub-interfaces. There are a few books with huge errors saying
that it is enabled on point-to-point interfaces by default. . S0/0 is
Frame:
Router#sh ip int s0/0
Serial0/0 is down, line protocol is down
Internet address
You're not showing the subinterface. On a point-to-point subinterface,
split horizon is enabled by default:
RCORP#sho ip int s1/0.16
Serial1/0.16 is up, line protocol is up
Internet address is 10.8.10.70/24
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
Split horizon is disabled by default on a Frame point-to-point
interfaces/sub-interfaces. There are a few books with huge errors saying
that it is enabled on point-to-point interfaces by default. . S0/0 is
I think you are wrong here. Split horizon IS enabled by default:
Serial0.1 is
RIP and/or IGRP are not the factors enabling/disabling split horizon on a
frame relay interface.
Encapsulating a 'physical' interface for frame relay disables split horizon
by default.
Encapsulating a 'logical/subinterface' (pt-to-pt / multipoint) for frame
relay - split horizon is enabled by
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