[lug] Multihoming with Redhat

[Dhruva Reddy]

I assume you mean something like
/etc/sysconfig/network-scripts/ifcfg-eth0:1.  I am
trying to use eth0.  The output from my previous post
is the result of running
/etc/sysconfig/network-scripts/ifup ifcfg-eth0:1.  I
copied this file from ifcfg-eth0, and changed nothing
but the "DEVICE" parameter.

DEVICE="eth0:1"
BOOTPROTO="none"
BROADCAST=10.0.5.255
IPADDR="10.0.5.20"
NETMASK="255.0.0.0"
NETWORK=10.0.5.0
ONBOOT="yes"
IPXNETNUM_802_2=""
IPXPRIMARY_802_2="no"
IPXACTIVE_802_2="no"
IPXNETNUM_802_3=""
IPXPRIMARY_802_3="no"
IPXACTIVE_802_3="no"
IPXNETNUM_ETHERII=""
IPXPRIMARY_ETHERII="no"
IPXACTIVE_ETHERII="no"
IPXNETNUM_SNAP=""
IPXPRIMARY_SNAP="no"
IPXACTIVE_SNAP="no"

--- bdoctor at ps-ax.com wrote:
> What is the interface you are trying to use for
> this?  The "root", like
> eth0, or eth1.  Also, can you post the config file? 
> And, after you have
> created the file, run "ifup eth0:1" -- or whatever
> the new virtual device
> you are working with is.
> 
> Do post the file though.
> 
> -brad
> 
> > I tried this, and got the following message when I
> > tried to fire up the new interface:
> > 
> > SIOCSIFADDR: No such device
> > SIOCSIFFLAGS: No such device
> > SIOCSIFNETMASK: No such device
> > SIOCSIFBRDADDR: No such device
> > SIOCSIFFLAGS: No such device
> > SIOCADDRT: No such device
> > 
> > Can someone tell me what to look for?
> > 
> > Thanks,
> > Dhruva
> > 
> > --- bdoctor at ps-ax.com wrote:
> > > In terms of setting up the interface(s), you
> should
> > > look in 
> > > /etc/sysconfig/network-scripts
> > > 
> > > In there you find files like ifcfg-eth0,
> ifcfg-lo,
> > > etc.  To use the same
> > > interface with multiple IP addresses, copy the
> > > ifcfg-eth0 file to ifcfg-eth0:1.
> > > Then, edit the device entry and change that to
> > > eth0:1, and the rest should
> > > be obvious.  The device entry is critical,
> however.
> > > 
> > > If you need multiple static routes, create the
> file 
> > > /etc/sysconfig/network/static-routes
> > > 
> > > Some samples for the static-routes:
> > > 
> > > eth0 net 192.168.0.0 netmask 255.255.255.0 gw
> eth0
> > > eth0 net 192.168.1.0 netmask 255.255.255.0 gw
> eth0
> > > eth0:1 net 207.2.3.4 netmask 255.255.255.248 gw
> > > eth0:1
> > > 
> > > -brad
> > > 
> > > 
> > > > We have a machine with one physical network
> > > adapter
> > > > that we would like to use for multihoming (2
> IP
> > > > addresses).
> > > > 
> > > > I can't seem to figure out how to do this on
> > > Redhat
> > > > 6.2, nor can I find any information on how to
> do
> > > this.
> > > >  If anyone could point me in the right
> direction,
> > > that
> > > > would be much appreciated.
> > > > 
> > > > Thanks,
> > > > Dhruva
> > > > 
> > > >
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