[lug] Multihoming with Redhat

[Dhruva Reddy]

Oops.  I should have said I changed nothing but
"DEVICE" and "IPADDR".  I tried "ifup eth0:1" and got
the same output.

--- bdoctor at ps-ax.com wrote:
> Ah, I see.  use "ifup eth0:1", it will figure out
> the file name :)
> Also, you may want to change the IP to be what you
> want, otherwise it will
> likely complain and possibly mess something up.
> 
> -brad
> 
> > 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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