[lug] Multihoming with Redhat

[Dhruva Reddy]

This gives me:  SIOCSIFFLAGS: No such device

And then ifup does the same thing as before.

Do I need to modify /etc/sysconfig/network to include
this new interface?

I guess I'll have to walk through and figure out what
all I messed with to try to get this working.  Thanks
for all your help!

Dhruva

--- bdoctor at ps-ax.com wrote:
> That is very odd.  I copied your file and made the
> network 1.x and it worked
> fine.  Try using "ifdown eth0:1" first?
> 
> -brad
> 
> > 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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