[ILUG] Creating a multihomed host.

[Niall O Broin]

On Mon, Aug 13, 2001 at 03:11:04PM +0100, Oisin Kim wrote:

> One final point though:
> 
> >So in the ifconfig given
> > eth1      Link encap:Ethernet  HWaddr 00:10:B5:AD:2F:E2
> >           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:100
> >           Interrupt:11 Base address:0x5400
> 
> >this card will be seeing all the broadcasts, passing them to the OS
> >which will then chuck them - as there are no protocols to deliver them
> >to...
> 
> In fact this card is actually working, it represents a broadcast address that 
> is used to keep shared data in sync between some application servers. the 
> reason that the values for packets are 0 is that I haven't used it in a 
> couple of weeks, (before my last reboot)
> but it does work, I have used this set of cards as the only network by 
> unplugging the other hub.

That's well bizarre ! You say you haven't used it in a couple of weeks -
perhaps it worked then because it had an IP address. Right now, the ifconfig
output says that the card has no IP address associated with it. If you
disconnect the cable from eth0 NOW can you still e.g. ping other machines
from this one. Or can you ping the IP address which you believe to be
associated with eth1 ? If so, is there perhaps some kind of bonding of the
two Ethernet interfaces in use so that you have some kind of failover ? Just
a wild guess, as I can't see how otherwise you can pass IP traffic through
that card.

> Seems strange that it doesn't show the IP address I set in linuxconf though 
> as all regualr IP addresses show as normal. The Ip address is shown in 
> linuxconf still.

What do you mean by "all regualr IP addresses show as normal" ? (I wouldn't
worry about what Linuxconf thinks, BTW - that's just a reflection of its
database why doesn't necessarily concur with reality)




Niall