router isis i1
 net 48.4848.0000.0000.0111.00
 address-family ipv4 unicast
 address-family ipv6 unicast
  single-topology
 interface Loopback0
  passive
  address-family ipv4 unicast
  address-family ipv6 unicast
 interface GigabitEthernet0/4/0/0
  address-family ipv4 unicast
  address-family ipv6 unicast
 interface GigabitEthernet0/4/0/1
  address-family ipv4 unicast
  address-family ipv6 unicast