STrange network problem

[Rus Foster]

Hi All,
I've just tried to bring up a new IP alias and am having trouble using it

Currently

ls512# ifconfig -a
vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 63.247.81.162 netmask 0xfffffff8 broadcast 63.247.81.167
        inet6 fe80::230:1bff:fe37:fb48%vr0 prefixlen 64 scopeid 0x1
        inet 63.247.81.163 netmask 0xffffffff broadcast 63.247.81.163
        inet 63.247.81.164 netmask 0xffffffff broadcast 63.247.81.164
        inet 63.247.81.165 netmask 0xffffffff broadcast 63.247.81.165
        inet 63.247.81.166 netmask 0xffffffff broadcast 63.247.81.166
        inet 63.247.81.167 netmask 0xffffffff broadcast 63.247.81.167
        ether 00:30:1b:37:fb:48
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
lp0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500
faith0: flags=8002<BROADCAST,MULTICAST> mtu 1500
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
        inet 127.0.0.1 netmask 0xff000000
ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552
ls512# ping 63.247.81.167
PING 63.247.81.167 (63.247.81.167): 56 data bytes
ping: sendto: Can't assign requested address
ping: sendto: Can't assign requested address
ping: sendto: Can't assign requested address
ping: sendto: Can't assign requested address
^C
--- 63.247.81.167 ping statistics ---
4 packets transmitted, 0 packets received, 100% packet loss

but ...

ls512# ping 63.247.81.166
PING 63.247.81.166 (63.247.81.166): 56 data bytes
64 bytes from 63.247.81.166: icmp_seq=0 ttl=64 time=0.048 ms
64 bytes from 63.247.81.166: icmp_seq=1 ttl=64 time=0.031 ms
^C
--- 63.247.81.166 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.031/0.040/0.048/0.009 ms

ls512# netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags    Refs      Use  Netif Expire
default            63.247.81.161      UGSc       98    91635    vr0
63.247.81.160/29   link#1             UC          1        0    vr0
63.247.81.161      00:0a:8a:f2:e1:00  UHLW       95        0    vr0   1188
63.247.81.163      00:30:1b:37:fb:48  UHLW        2    31131    lo0 =>
63.247.81.163/32   link#1             UC          1        0    vr0
63.247.81.164      00:30:1b:37:fb:48  UHLW        2    68201    lo0 =>
63.247.81.164/32   link#1             UC          1        0    vr0
63.247.81.165      00:30:1b:37:fb:48  UHLW        2     2336    lo0 =>
63.247.81.165/32   link#1             UC          1        0    vr0
63.247.81.166      00:30:1b:37:fb:48  UHLW        0        4    lo0 =>
63.247.81.166/32   link#1             UC          1        0    vr0
63.247.81.167      00:30:1b:37:fb:48  UHLWb       0       27    lo0 =>
63.247.81.167/32   link#1             UC          1        0    vr0
127.0.0.1          127.0.0.1          UH          0       48    lo0

Any ideas?

Nothing in dmesg
Nothing in /var/log/messages

rus
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