routing problem

[dave mallery <dmallery@cia-g.com>]

hi

now i believe myself to be a fairly experienced deb user.  this is
humiliating:

i have a home network (10.42.42.0) which has a floppyfw gateway to the
world at 10.42.42.254.  works.

i have been building a cluster (actually, resuscitating one, but that's
another story).  the cluster network is 10.42.43.0.  its gateway is
called buster and has 2 nics, 10.42.42.112 (eth0) and 10.42.43.254
(eth1).

the cluster nodes (only 3 running now) are c0n1 c0n2 and c0n3. they are
served their roots by buster (etherboot). works. that was hard. this is
easy?

too bad i can't ping in or out.

from inside out:
c0n1:/home/dmallery>> route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric RefUse Iface
10.42.43.0      0.0.0.0         255.255.255.0   U     0      0     0 eth0
0.0.0.0         10.42.43.254    0.0.0.0         UG    0      0   0 eth0

cluster member c0n1 can ping buster, but no further.

next here's buster:
buster:/etc/init.d>> route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric RefUse Iface
10.42.43.0      0.0.0.0         255.255.255.0   U     0      0    0 eth1
10.42.42.0      0.0.0.0         255.255.255.0   U     0      0    0 eth0
0.0.0.0         10.42.42.254    0.0.0.0         UG    0      0    0 eth0

buster can ping into the cluster and outwards into 10.42.42.0 land.
buster is happy.  buster can even ping debian.org!

next (and last) here's bilbo, a sarge machine on the home front:

bilbo:/>> route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref   Iface
10.42.43.0      10.42.42.112    255.255.255.0   UG    0      0     0 eth0
10.42.42.0      0.0.0.0         255.255.255.0   U     0      0     0 eth0
0.0.0.0         10.42.42.254    0.0.0.0         UG    0      0     0 eth0

bilbo can ping the world and buster but not into the cluster.

(i realize that i will have to add a route to the firewall to the cluster
but that can wait till c0n1 can ping bilbo!)

is this a routing problem, or am i looking endlessly in the wrong place?
i am at a dead stop.  i would so appreciate some pointers.

thanks in advance.

dave

-- 
Dave Mallery, K5EN          (debian testing & woody)  
PO Box 520         .~.    _      Ramah,  NM  87321     
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