On Sat, 14 Dec 1996, Bob Tracy - TDS wrote:
>
> A.N.Kuznetsov wrote:
> >
> > Interface routes are added automatically in 2.1.15,
> > you need not add them manually.
> > But if you want to override default behaviour,
> > kernel will require complete route specification:
> > address, mask, device.
>
> Confirmed. What is the proper mask for a "default" route? My
> guess is that it is either all 0's or all 1's. In my opinion,
> a netmask for a default route doesn't make a great deal of sense.
> Certainly a netmask makes a great deal of sense for a route to a
> specific network or host, but the idea of a default route is to
> route that which cannot otherwise be routed. If the default route
> netmask value doesn't matter, then the kernel shouldn't complain
> when I fail to specify one :-).
random:~# netstat -rn
Kernel routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
152.52.28.23 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
152.52.195.0 0.0.0.0 255.255.255.0 U 0 0 2 eth0
152.52.196.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 7 lo
0.0.0.0 152.52.28.23 0.0.0.0 UG 0 0 5 ppp0
random:~#
If you specify
random:~# route add default gw 152.52.28.23 ppp0
it become 0.0.0.0, as it should, but if you do
random:~# route add 0.0.0.0 gw 152.52.28.23 netmask 0.0.0.0 ppp0
it adds it as 255.255.255.255 (which isn't correct).
> Bob Tracy | "The gene pool could use a little chlorine."
> AFIWC/AFCERT | -- Unknown
> rct@merkin.csap.af.mil |
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