Date: Wed, 31 Mar 1999 17:18:33 -0800 (PST) From: Jim Pazarena <paz@ccstores.com> To: freebsd-questions@freebsd.org Subject: problem with dual NIC's in computer Message-ID: <9903311718.aa14955@dick.ccstores.com>
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I have two machines connected to a third
ns
209.53.238.2 -- ciu
|-- 209.53.238.1
209.53.238.3 --
ns2
the third has two nic's, connecting one network to another
ciu
209.53.238.1
209.205.50.8
uw7
This machine in turn is connected to the outside world via my
209.205.50/26 IPs.
In my examples below I refer to machine "r-qci" which is 209.205.50.1
and is hanging on the other side of the dual NICs machine.
209.53.238/24 <------> 209.53.238.1
209.205.50.8 <------> 209.205.50/26 "outside world"
ciu/uw7
PROBLEM:
While logged into ciu/uw7 (the dual NIC's)
I get unsual ping and traceroutes to (ns) but perfectly normal one for
the other machine in the network (ns2). Here is some output:
-----
# traceroute ns2
traceroute to ns2.qcislands.net (209.53.238.3), 30 hops max,
80 byte packets
1 ns2.qcislands.net (209.53.238.3) 10 ms 0 ms 0 ms
# traceroute ns
traceroute to ns.qcislands.net (209.53.238.2), 30 hops max,
80 byte packets
1 ciu (209.53.238.1) 0 ms 0 ms 0 ms
2 ciu (209.53.238.1) 0 ms 0 ms 0 ms
3 ciu (209.53.238.1) 0 ms 0 ms 0 ms
4 ciu (209.53.238.1) 0 ms 10 ms 0 ms
5 ciu (209.53.238.1) 0 ms 0 ms ns.qcislands.net (209.53.238.2)
0 ms
-----
A route get shows nothing unusual:
# route get ns
route to: ns.qcislands.net
destination: ns.qcislands.net
interface: net1
flags: <UP,HOST,LLINFO>
rpipe spipe ssthresh rtt,msec rttvar hopcount mtu
expire tos
0 0 0 0 0 0 1500
978 0
# route get ns2
route to: ns2.qcislands.net
destination: ns2.qcislands.net
interface: net1
flags: <UP,HOST,LLINFO>
rpipe spipe ssthresh rtt,msec rttvar hopcount mtu
expire tos
0 0 0 0 0 0 1500
946 0
-----
A ping from the r-qci to ns2 looks normal. A ping from r-qci to ns:
64 bytes from ns.qcislands.net (209.53.238.2): icmp_seq=4 ttl=254
time=0 ms
64 bytes from ns.qcislands.net (209.53.238.2): icmp_seq=4 ttl=254
time=0 ms (DUP!)
64 bytes from ns.qcislands.net (209.53.238.2): icmp_seq=4 ttl=254
time=0 ms (DUP!)
64 bytes from ns.qcislands.net (209.53.238.2): icmp_seq=4 ttl=254
time=0 ms (DUP!)
64 bytes from ns.qcislands.net (209.53.238.2): icmp_seq=4 ttl=254
time=0 ms (DUP!)
-----
Can ANYONE suggest what might be wrong with "ns" when "ns2" is fine?
I suspect the dual NICs on CIU/UW7 are screwing up.. but I can't
determine exactly what is going wrong. ns & ns2 are both FreeBSD3.1 machines
with SMC 8432BT NICs. uw7 is a UnixWare 7 machine.
BTW, I'm in transition from one upstream provider to another and I'm trying
to make the move seamless for my customers. Hence 209.53.238/24 is "mine"
but in-accessible from the outside world as yet.
--
Jim Pazarena mailto:paz@ccstores.com
http://www.qcislands.net/paz
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