Hello i wonder how can be possible to configure multiply loop-back interfaces in OpenWrt?
I tryed the following:
config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.255.255.0'
config interface 'loopback1'
option ifname 'lo1'
option proto 'static'
option ipaddr '127.1.0.1'
option netmask '255.255.255.0'
config interface 'loopback2'
option ifname 'lo2'
option proto 'static'
option ipaddr '127.1.1.1'
option netmask '255.255.255.0'
config interface 'loopback3'
option ifname 'lo3'
option proto 'static'
option ipaddr '127.1.2.1'
option netmask '255.255.255.0'
but no luck:
....
gre4-gre1 Link encap:UNSPEC HWaddr C0-A8-38-02-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:172.16.12.1 P-t-P:172.16.12.1 Mask:255.255.255.252
inet6 addr: fe80::5efe:c0a8:3802/64 Scope:Link
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1280 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:20 errors:0 dropped:0 overruns:0 frame:0
TX packets:20 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1893 (1.8 KiB) TX bytes:1893 (1.8 KiB)
root@OWRT-V-01:~#
thank you
pwned
August 17, 2020, 7:53pm
2
I would not wonder if openwrt is not designed to manage those devices. What happen if you issue sth. like:
ifup lo3
uci set network.loopback1.ifname="@loopback"
uci set network.loopback2.ifname="@loopback"
uci set network.loopback3.ifname="@loopback"
uci commit network
/etc/init.d/network restart
See also: https://openwrt.org/docs/guide-user/network/network_interface_alias
If you need different L2 devices, then:
cat << EOF > /etc/modules.d/00-custom
dummy numdummies=3
EOF
opkg update
opkg install kmod-dummy
uci set network.loopback1.ifname="dummy0"
uci set network.loopback2.ifname="dummy1"
uci set network.loopback3.ifname="dummy2"
uci commit network
/etc/init.d/network restart
3 Likes
pwned
August 17, 2020, 8:00pm
4
Ah, simple syntax problem.
1 Like
Thank you vgaetera.
uci set network.loopback1.ifname="@loopback"
uci set network.loopback2.ifname="@loopback"
uci set network.loopback3.ifname="@loopback"
uci commit network
/etc/init.d/network restart
that is not really helped.
I even try to change the ip netmask just for the lo interface but no effect like it hard coded.
> config interface 'loopback'
> option ifname 'lo'
> option proto 'static'
> option ipaddr '121.0.0.1'
> option netmask '255.255.255.0'
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:20 errors:0 dropped:0 overruns:0 frame:0
TX packets:20 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1893 (1.8 KiB) TX bytes:1893 (1.8 KiB)
Any how i think dummy interface would be perfect for my purpose
Thank you
pwned
August 17, 2020, 8:25pm
6
Hmm... If I issue:
uci set network.loopback1.ifname="@loopback"
I get:
uci: Invalid argument
Same for dummy line (kmod installed).
i added by hand to network config. and it is worked
config interface 'loopback1'
option proto 'static'
option ipaddr '10.1.0.1'
option netmask '255.255.255.0'
option ifname 'dummy0'
config interface 'loopback2'
option proto 'static'
option ipaddr '10.1.1.1'
option netmask '255.255.255.0'
option ifname 'dummy1'
config interface 'loopback3'
option proto 'static'
option ipaddr '10.1.2.1'
option netmask '255.255.255.0'
option ifname 'dummy2'
2 Likes
This is a working method for OpenWrt to create a separate network/interface.
It is an abstraction level above the L3 device that you can rely on in other configs.
Although, a separate network/interface does not mean a separate L2/L3 device.
If it does not match your final goal, use the second method.
pwned:
uci: Invalid argument
I posted only the changes relative to the OP config.
You need to define the interfaces beforehand.
1 Like
pwned
August 17, 2020, 8:40pm
9
Ah, forgot about that. Dummy in front of the screen. oO
1 Like