IPv4 address: .* is not on the network

[Randy Bush]

a host sees these kinds of messages

Jun  7 00:20:41 r2 kernel: IPv4 address: "98.128.0.1" is not on the network
Jun  7 03:38:00 r2 kernel: IPv4 address: "98.128.0.2" is not on the network
Jun  7 04:32:08 r2 kernel: IPv4 address: "98.128.0.1" is not on the network
Jun  7 06:55:12 r2 kernel: IPv4 address: "98.128.0.2" is not on the network
Jun  7 08:52:23 r2 kernel: IPv4 address: "98.128.0.1" is not on the network
Jun  7 10:02:38 r2 kernel: IPv4 address: "98.128.0.2" is not on the network
Jun  7 13:19:43 r2 kernel: IPv4 address: "98.128.0.1" is not on the network
Jun  7 13:32:25 r2 kernel: IPv4 address: "98.128.0.2" is not on the network
Jun  7 16:32:27 r2 kernel: IPv4 address: "98.128.0.2" is not on the network
Jun  7 17:46:24 r2 kernel: IPv4 address: "98.128.0.1" is not on the network
Jun  7 20:59:29 r2 kernel: IPv4 address: "98.128.0.2" is not on the network
Jun  7 21:54:26 r2 kernel: IPv4 address: "98.128.0.1" is not on the network

yet

r2# ifconfig 
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9600
        options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
        ether 00:1b:21:28:e2:44
        inet 147.28.1.2 netmask 0xfffffffc broadcast 147.28.1.3
        media: Ethernet autoselect (100baseTX <half-duplex>)
        status: active
em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9600
        options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
        ether 00:1b:21:28:e2:45
        inet 147.28.1.6 netmask 0xfffffffc broadcast 147.28.1.7
        media: Ethernet autoselect (100baseTX <half-duplex>)
        status: active
em2: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4>
        ether 00:30:48:d4:a3:0a
        media: Ethernet autoselect
        status: no carrier
em3: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4>
        ether 00:30:48:d4:a3:0b
        inet 147.28.0.5 netmask 0xffffff00 broadcast 147.28.0.255
        inet 192.83.230.252 netmask 0xffffff00 broadcast 192.83.230.255
        inet 198.133.206.252 netmask 0xffffff00 broadcast 198.133.206.255
        inet 198.180.153.252 netmask 0xffffff00 broadcast 198.180.153.255
        inet 98.128.0.3 netmask 0xffff0000 broadcast 98.128.255.255
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=3<RXCSUM,TXCSUM>
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5 
        inet6 ::1 prefixlen 128 
        inet 127.0.0.1 netmask 0xff000000 
        inet 147.28.7.3 netmask 0xffffffff 

and

r2# ping -c 3 98.128.0.1
PING 98.128.0.1 (98.128.0.1): 56 data bytes
64 bytes from 98.128.0.1: icmp_seq=0 ttl=255 time=0.993 ms
64 bytes from 98.128.0.1: icmp_seq=1 ttl=255 time=144.373 ms
64 bytes from 98.128.0.1: icmp_seq=2 ttl=255 time=0.308 ms

--- 98.128.0.1 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.308/48.558/144.373/67.752 ms
r2# ping -c 3 98.128.0.2
PING 98.128.0.2 (98.128.0.2): 56 data bytes
64 bytes from 98.128.0.2: icmp_seq=0 ttl=64 time=1.224 ms
64 bytes from 98.128.0.2: icmp_seq=1 ttl=64 time=0.934 ms
64 bytes from 98.128.0.2: icmp_seq=2 ttl=64 time=0.776 ms

--- 98.128.0.2 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.776/0.978/1.224/0.186 ms

what is the issue here?

randy