Re: ifconfig add -> resolver error

On Wed Sep 25 2002 at 16:58, "Jason Pratt" wrote:

> Hi. I've been having an issue with ifconfig when adding an ip address.
> it goes like this:
> 
> > ifconfig eth0 add 192.168.1.9
> > 192.168.1.9: Resolver Error 0 (no error)

Where is the network mask?

Also, better to use "/sbin/ip address add dev eth0 192.168.1.9/24"
(or whatever netmask you need).  The 2.2.x kernels introduced an
brand new and very powerful ip networking structure that makes it
one of the most advanced routers available.  With this one tool, you
can configure almost every component of your networking, and do some
real magic (like multiple default routes, policy routing and so on).
/sbin/tc (traffic control) is its sister utility that allows you to
filter and control ip traffic through your router.  Check them out!
(Search google for the advanced routing howto).

> the current interface configuration is as follows:
> 
> eth0      Link encap:Ethernet  HWaddr 00:02:55:9C:20:D1
>           inet addr:192.168.1.101  Bcast:192.168.1.255 Mask:255.255.255.0
 [ ... ]
> routing looks like this:
> 
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 192.168.1.101   0.0.0.0         255.255.255.255 UH    0      0        0 eth0
 [ ... ]

"/sbin/ip address" (or "ip a" for short) will give a much more
useful and accurate status of your IP addresses than /sbin/ifconfig.
Also, "/sbin/ip route" (or "ip r") is much more comprehensive (and
powerful) than /sbin/route (which, like ifconfig, is now obselete).

With /sbin/ip you can easily add multiple addresses without having
any of them aliased.  (Although with rh6.2 it is the only way to
have it configured correctly at bootup).

Cheers
Tony