# virtual interface on bond0
**URL:** https://forums.suse.com/t/virtual-interface-on-bond0/27863
**Category:** SLES Networking
**Created:** [February 2, 2016, 6:24pm UTC](https://forums.suse.com/t/virtual-interface-on-bond0/27863 "2016-02-02T18:24:50Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@lbemont](https://forums.suse.com/u/lbemont)
#### Post date: [February 2, 2016, 6:24pm UTC](https://forums.suse.com/t/virtual-interface-on-bond0/27863/1 "2016-02-02T18:24:50Z")
I would like to add a virtual interface to an existing bonded interface. Can I accomplish by modifying the configuration file as shown below? If not, how do I do it? Also, is there a way to ifup this virtual interface independent of bond0 itself?
Thanks.
# more /etc/sysconfig/network/ifcfg-bond0
BONDING\_MASTER=‘yes’
BONDING\_MODULE\_OPTS=‘mode=active-backup miimon=100’
BONDING\_SLAVE0=‘eth0’
BONDING\_SLAVE1=‘eth2’
BOOTPROTO=‘static’
BROADCAST=‘’
ETHTOOL\_OPTIONS=‘’
IPADDR=‘192.168.1.7/24’
MTU=‘’
NAME=‘’
NETWORK=‘’
REMOTE\_IPADDR=‘’
STARTMODE=‘auto’
USERCONTROL=‘no’
# new virtual interface
IPADDR\_V1=Â192.168.1.8′
NETMASK\_V1=Â255.255.255.0′
BROADCAST\_V1=Â192.168.1.255′
---
### Author:  [@Jens-U](https://forums.suse.com/u/Jens-U)
#### Post date: [February 4, 2016, 1:47pm UTC](https://forums.suse.com/t/virtual-interface-on-bond0/27863/2 "2016-02-04T13:47:59Z")
Hi lbemont,
by adding another address to the ifcfg file you’re not adding a virtual interface, but a secondary IP address to the interface.
From /etc/sysconfig/network/ifcfg.template:
[QUOTE] # For multiple addresses use this variable multiple times and extend them with
# different suffixes. For example IPADDR\_1=, IPADDR\_2=. See section 'Multiple
# addresses’ in manpage ifcfg).[/QUOTE]
So your syntax of using the suffix “\_V1” should work. On the other hand, individual “up/down” of that IP address will not work.
To see the configure secondary IP address, use “ip addr list bond0”.
Regards,
Jens