On May 25, 2007, at 12:34 PM, Andrei Manescu wrote:
If I want to put two public IP addresses, with different subnetmasks (my ISP is changing some subnets and for two months I will be able to use two public ip addresses) on the same interface (xl0) my rc.conf shuld look like this:

ifconfig_xl0="inet 84.125.210.108  netmask 255.255.252.0"
ifconfig_xl0_alias0="inet 81.66.10.36 netmask 255.255.255.255" (this ip address has mask /24 )

If your aliases are part of the same subnet as the "primary" or first configured IP, then you want to use the all-1's netmask. In your case, however, the second IP is part of a completely different subnet, and you can (and should) use a /24 netmask....

--
-Chuck

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