I'll be running a 56k DDS using Portmaster Routers at both ends (an IRX
114 (3.1.2R) on my end and an an OR-HS (3.5L) on the customer end (thanks
to Mr. Tribaldos introducing me to the OR line).
We primarily deal with non-contiguous Class-C's and host routes here, so
this is the first time I've given thought to subnetting a Class-C. I was
reading the technotes on Livingston's web site where the setup of an
_unnumbered_ PTP wan connection using /24's on both sides is illustrated.
I had a couple of questions, which I was hoping some of you fine folks
could help me with :-)
For ease of discussion, I'll go give some details up front:
my end: an IRX-114 eth0 addr XXX.XXX.196.1 (network XXX.XXX.196.0/24)
on customer's end: OR-HS eth0 addr XXX.XXX.132.33 (1st host on 2nd network
on XXX.XXX.132.0/27)
I guess my questions are:
Since both routers will be using a different primary subnet, I'm a
bit confused at the instructions for setting the netmask of the
synchronous ports on the router, especially since it's an
unnumbered connection. My IRX has a netmask of 0.0.0.0 on it's
existing serial connection which is its default route to our
upstream provider, and it's ethernet netmask is 255.255.255.0. I'm
assuming the IRX is taking the 0.0.0.0 to mean the netmask of the
ethernet interface.
1. Do I need to assign a netmask to the W1 (or S2) of the routers,
or simply do an "add netmask XXX.XXX.132.0 255.255.255.224" on my
router (which is a /24) to introduce it to the other
router's netmask and the opposite on the other end? The
netmasks of the ethernet on both routers will be different.
2. If my customer's router needs a netmask on his w1 interface,
should it be the netmask of the remote network or the netmask of
the subnet it's ether0 is using?
What I was thinking of doing on my IRX-114 (my side):
set s2 network hardwire
set s2 address 0.0.0.0
# for unnumbered
set s2 dest XXX.XXX.132.33
# ethernet address of remote router
set s2 netmask 255.255.255.224
# the netmask of the remote network
Then on the remote router:
set ether0 address XXX.XXX.132.33
set ether0 netmask 255.255.255.224
# this appeared to add a dynamic netmask entry on on the OR-HS
# as the active netmask in its netmask table
add netmask XXX.XXX.196.0 255.255.255.0
# do I need the above because my other router is a /24?
set w1 address 0.0.0.0
# for unnumbered
set w1 dest XXX.XXX.196.1
# ether of router on the other end
set w1 netmask 255.255.255.0
# right? my other network is a /24
Thoughts :-)
TIA
-Jason
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