From owner-freebsd-hackers  Tue Jan 14 23: 9:12 2003
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Subject: Re: adding some new IPs from a different subnet - errors
From: "Daniel O'Connor" <doconnor@gsoft.com.au>
To: Josh Brooks <user@mail.econolodgetulsa.com>
Cc: freebsd-hackers@FreeBSD.ORG
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On Wed, 2003-01-15 at 17:15, Josh Brooks wrote:
> defaultrouter="10.10.10.1"
> ifconfig_fxp0="inet 10.10.10.2 netmask 255.255.255.0"
> ifconfig_fxp0_alias0="inet 10.10.10.3 netmask 255.255.255.255"
> 
> Ok, easy enough - one interface, one default router, and two IPs on that
> subnet.
> 
> BUT - as it happens, 10.10.10.1 is _also_ the default router for
> 192.168.0.0/24 ... it has the IP 192.168.0.1, but it also has the IP of
> 10.10.10.1 - it is the same default router, but with a few different
> subnets on it.
> 
> So, I went and added one of the 192 addresses to my system:
> 
> defaultrouter="10.10.10.1"
> ifconfig_fxp0="inet 10.10.10.2 netmask 255.255.255.0"
> ifconfig_fxp0_alias0="inet 10.10.10.3 netmask 255.255.255.255"
> ifconfig_fxp0_alias1="inet 192.168.0.2 netmask 255.255.255.255"

Change the netmask for alias0 to be 255.255.255.0. You only need a
'point to point' (255.255.255.255) netmask if the alias would conflict
with an existing subnet (as in how you have alias0)

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 9A8C 569F 685A D928 5140  AE4B 319B 41F4 5D17 FDD5


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