[ILUG] static routing

[Ger Gorman]

hmm. I see now where I was going wrong. I thought the route command 
wrote a static route table. duh.
I still don't understand though why the local host isn't by default 
set to to through lo. 

helps loads (reading nag.html now!)
Ger.


> Under RH5.x and RH6.x static routes are configured by either 
> linuxconf or the file /etc/sysconfig/static-routes.  Take a look
> at the script /etc/sysconfig/network-scripts/ifup-routes.
> 
> If you are using linuxconf, then I can't help you.  
> 
> If you are not, then create the static-routes file something like this:
> 
> eth0 host 140.203.1.130 netmask 255.255.255.255 
> 
> The first field is the name of the interface that this route 
> will go through.  The remainder is all the other arguments
> to a 'route' command (less the '-' in -host or -net) so the
> above line corresponds to 
> 
> # route add -host 140.203.1.130 netmask 255.255.255.255 eth0
> 
> There should not be any space before the interface name at the
> beginning of the line.
> 
> If you bring up the eth0 network via the Redhat scripts (i.e.
> _not_ by doing 'ifconfig eth0 up') then this route will be added.
> 
> > am I also right in thinking that the kernel edits the table if 
> > it finds a particular network unreachable?
> 
> No.  A routing daemon using one of the Internet routing protocols
> (such as RIP, OSPF, etc) will talk to other routers and exchange
> info about which networks are accessible and update the routing
> table accordingly (by doing the equivalent of /sbin/route add
> and /sbin/route del).  The kernel itself won't.
> 
> Note that you probably _don't_ want to run a routing daemon.
> Easily 99% of all scenarios can be handled simply without one.
> And 99% of them won't need static routes either.  A misconfigured
> routing daemon can cause all sorts of grief.
> 
> For more info, take a look at the Linux Network Administator's
> Guide (which you probably have installed in /usr/doc/LDP/nag)
> for general networking info and the RedHat docs for the 
> Redhat-specific stuff.  Alternatively, take a look through 
> etc/rc.d/init.d/network and the scripts in /etc/sysconfig/network-scripts.
> Much can be learned.
> 
> Hope this helps.
> 
> Later,
> Kenn
> 
> 
> -- 
> Irish Linux Users' Group: ilug at linux.ie
> http://www.linux.ie/mailman/listinfo/ilug for (un)subscription information.
> List maintainer: listmaster at linux.ie
>