How to enable IPV4 address in ARRIS VAP2500

How to enable ipv6?

It’s my network config:

1: lo: <LOOPBACK,UP,10000> mtu 16436 qdisc noqueue 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth1_0: <BROADCAST,MULTICAST,UP,10100> mtu 1500 qdisc qdrv_sch_red qlen 512
    link/ether f4:0e:83:08:d4:aa brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.100/24 brd 192.168.1.255 scope global eth1_0
3: br0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue 
    link/ether f4:0e:83:08:d4:aa brd ff:ff:ff:ff:ff:ff
    inet 208.126.34.56/23 brd 208.126.35.255 scope global br0
    inet6 fe80::f60e:83ff:fe08:d4aa/64 scope link 
       valid_lft forever preferred_lft forever
4: wifi0: <BROADCAST,MULTICAST,UP,10100> mtu 1500 qdisc qdrv_tx_sch qlen 1536
    link/ether f4:0e:83:08:d4:ab brd ff:ff:ff:ff:ff:ff

Please, help me, im try to do it last 3 days :(