Bizarre multi-homed name resolution with nmbd?
Bob Franklin
R.C.Franklin at reading.ac.uk
Tue Oct 13 11:43:24 GMT 1998
Hi,
I connected a multi-homed Win95 machine (carrot, see below) to two
networks (ankh-net and morpork-net) which a multi-homed Linux machine
running Samba 1.9.18p10 (or whatever the latest <2 is) was also connected
to (vimes) and wanted to see which of the two interfaces Win95 would
pick...
--------------------------------- ankh-net 134.225.241.0/24
| |
134.225.241.1 134.225.241.8
[ vimes ] [ carrot ]
134.225.242.2 134.225.242.8
| |
--------------------------------- morpork-net 134.225.242.0/24
I played an MP3 on carrot directly off a share on vimes and looked at the
lights on my hub. Bizarrely, I saw the ankh transmit light on vimes
flashing and the morpork light on carrot flashing.
Doing a netstat -rn on both machines, I saw a connection active from
vimes-morpork -> carrot-ankh... I'm sure the reason for the asymmetric
path will now be obvious!
Both the interfaces on carrot were DHCP configured and, amusingly, I
could use WINIPCFG to release/renew the morpork interface on carrot and
the routing would go the ankh interface way! ;)
Anyway... what I was inquiring about was: does nmbd do any address
sorting like named to avoid this happening? I'm a bit confused about how
I managed to get a connection across subnets in this way!
As for routing tables... vimes has no default route, only the two
directly attached subnets; carrot has a default route of vimes (since
vimes does routing)... there were two default route entries in the
table... which was being used I have no idea.
My suspicion is that it's problem some Win95 weirdness, but I was just
wondering if there were any known problems with nmbd in this kind of
situation.
Ta,
- Bob
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Bob "Mince" Franklin ~{], CNE ;), MCSE ;) Tel. (0118) 931 8432
Systems and Communications Fax. (0118) 975 3094
Computer Services Centre R.C.Franklin at reading.ac.uk
University of Reading, U.K. http://www.reading.ac.uk/~suq96rcf/
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