Without the change:
```
22:29 [0] m@devel2 ifconfig
vtnet0: flags=8863<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=4c04bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,LRO,VLAN_HWTSO,LINKSTATE,TXCSUM_IPV6>
ether 52:54:00:14:e3:19
inet6 fe80::5054:ff:fe14:e319%vtnet0 prefixlen 64 scopeid 0x1
inet6 2a01:4f8:13a:70c:ffff::8 prefixlen 96
media: Ethernet autoselect (10Gbase-T <full-duplex>)
status: active
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
22:30 [0] m@devel2 s route add default -inet6 2a01:4f8:13a:70c:ffff::1
22:30 [0] m@devel2 netstat -4rnW
Routing tables
Internet:
Destination Gateway Flags Nhop# Mtu Netif Expire
default 2a01:4f8:13a:70c:ffff::1 UGS 3 1500 vtnet0
10.199.199.190 link#2 UH 2 16384 lo0
127.0.0.1 link#2 UH 1 16384 lo0
22:30 [0] m@devel2 netstat -4onW
Nexthop data
Internet:
Idx Type IFA Gateway Flags Use Mtu Netif Addrif Refcnt Prepend
1 v4/resolve 127.0.0.1 lo0/resolve H 0 16384 lo0 2
2 v4/resolve 10.199.199.190 lo0/resolve H 0 16384 lo0 2
3 v4/gw 2a01:4f8:13a:70c:ffff::8 2a01:4f8:13a:70c:ffff::1 GS 0 1500 vtnet0 2
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```
After the change:
```
22:35 [0] m@devel2 netstat -4rnW
Routing tables
Internet:
Destination Gateway Flags Nhop# Mtu Netif Expire
default 2a01:4f8:13a:70c:ffff::1 UGS 3 1500 vtnet0
10.199.199.190 link#2 UH 2 16384 lo0
127.0.0.1 link#2 UH 1 16384 lo0
22:35 [0] m@devel2 netstat -4onW
Nexthop data
Internet:
Idx Type IFA Gateway Flags Use Mtu Netif Addrif Refcnt Prepend
1 v4/resolve 127.0.0.1 lo0/resolve H 0 16384 lo0 2
2 v4/resolve 10.199.199.190 lo0/resolve H 0 16384 lo0 2
3 v4/gw 10.199.199.190 2a01:4f8:13a:70c:ffff::1 GS 0 1500 vtnet0 2
22:35 [0] m@devel2
```