Multiple IP bindings on bonded network interface

Fran Garcia franchu.garcia at gmail.com
Fri Oct 15 10:38:18 UTC 2010


Hi Euan,

a couple of comments :

* Alias interfaces cannot be "upped", ie you cannot ifconfig xxx:0 up
(hence you get the "Cannot assign requested address" message). Issuing
a "ifconfig xxx:0 11.22.33.44" will do fine.

* Once you have defined the config file, the right command to activate
the interface is "ifup xxx:0" .

* You might want to add the "ONPARENT" attribute to the alias config
files, such as :

# cat ifcfg-eth1:1
DEVICE=eth1:1
ONPARENT=yes
BOOTPROTO=static
IPADDR=172.16.192.5
NETMASK=255.255.255.0


Cheers


On Fri, Oct 15, 2010 at 11:38, Euan de Boer <euan.deboer at elementum.co.nz> wrote:
> Hi,
>
> Sorry if this posts twice (first posting seems stuck awaiting admin
> approval).
>
> I am looking at binding 64 IP addresses to a Redhat 5 server with dual
> NIC's.  I have followed this guide:
> http://www.xenocafe.com/tutorials/linux/redhat/bind_multiple_ip_addresses_to_single_nic/index.phpand
> am able to successfully bind the IP's to the eth0 and eth1, however I
> would like to be able to bind them to my bonded interface bond0 to ensure
> redundancy.
>
> My bond0 is as follows:
>
> # bonded interface for production
> DEVICE=bond0
> BOOTPROTO=static
> ONBOOT=yes
> IPADDR=192.168.1.1
> NETMASK=255.255.255.0
> BONDING_OPTS="mode=4 miimon=10"
>
> When I create a bond0:0 containing one of the additional IP's like this:
>
> DEVICE=bond0:0
> BOOTPROTO=static
> ONBOOT=yes
>
> IPADDR=192.168.1.2
>
>  NETMASK=255.255.255.0
>
>
> and restart networking the interface does not come up.  Manually attempting
> to bring the interface up with if config gives me the following error:
>
> ifconfig bond0:0 up
> SIOCSIFFLAGS: Cannot assign requested address
>
> bond0 itself is completely working, however I just can't seem to add the
> additional aliases with my extra IP addresses.
>
> Does anyone know if what I am trying to do is supported, and if it is, where
> I am going wrong?
>
> I have googled this extensively today and have not found anything that
> explains if this is actually possible, or how to do it, so any ideas are
> very welcome!
>
> Thanks,
>
> Euan.
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