ip route 0.0.0.0 0.0.0.0 192.168.1.227
router isis cisco
 is-type level-2-only
 net 12.3456.5555.5555.00
 redistribute connected
 default-information originate
interface serial 0
 ipv6 router isis cisco
interface serial 1
 ipv6 router isis cisco
interface ethernet 0
 ipv6 router isis cisco