Hello,I have an ISP that requires that I use a subnet mask of 255.255.255.255 (/32) which requires that I add a static interface route for the gateway IP address because it's on a different subnet (http://help.ovh.ie/BridgeClient.) In Linux and FreeBSD this works as intended, and the network stack sends an ARP request for the gateway IP address when a static route is added.
On NetBSD, the network stack seems to make up a random MAC address and I don't see an ARP who-has request sent. Below, you can see that the MAC address of the gateway (126.96.36.199) is correct when the subnet is set to /27:
watson# arp -a ? (188.8.131.52) at 52:54:00:07:a6:f6 on vioif0 watson# ifconfig vioif0 vioif0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 address: 52:54:00:24:c2:c3 inet 184.108.40.206 netmask 0xffffffe0 broadcast 220.127.116.11 inet6 fe80::5054:ff:fe24:c2c3%vioif0 prefixlen 64 scopeid 0x1If I set the subnet and broadcast domain how my ISP wants it, and follow http://www.netbsd.org/docs/network/#nonsubnetgateway the MAC address is replaced with garbage data:
watson# ifconfig vioif0 inet 18.104.22.168 netmask 255.255.255.255 broadcast 22.214.171.124
watson# route add -host 126.96.36.199 -link -iface vioif0 add host 188.8.131.52: gateway vioif0 watson# ping 184.108.40.206 PING 220.127.116.11 (18.104.22.168): 48 data bytes ^C ----22.214.171.124 PING Statistics---- 3 packets transmitted, 0 packets received, 100.0% packet loss watson# arp -a ? (126.96.36.199) at 76:69:6f:69:66:30:00:0e:00:00:00:00 on vioif0 permanentNow, if I add the MAC address of the gateway (which isn't a reasonable solution, since my ISP has HRSP and other failovers setup) everything works out:
watson# route add -host 188.8.131.52 -link -iface vioif0:52540007a6f6Does anyone have any idea how to get this configuration to work without the MAC address of the gateway being specified for the route? I feel like this is a bug, as with Linux and FreeBSD this configuration (while I believe it's not particular sane) works just fine, the operating system does an ARP who-has request and you can access the default gateway.
Thank you, -Peter
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