Re: Routing quesiton (maybe specific to Nokia IP130 router?)

From: jgarner (jguarnera_at_hvc.rr.com)
Date: 03/21/05 

Date: Mon, 21 Mar 2005 01:10:42 GMT

You wrote:
>However, what if the router is an "end router" (I'm not sure if
>there's a commonly used term for this)...that is, it is connected
>directly to a subnet with a bunch of end-hosts on one of it's
>interfaces, rather than another gateway?

If you are asking how to route to a directly connected subnet, you shouldn't
have to do anything other than configure the router interface. I say
"shouldn't" because that's all you would have to do to a Cisco router or
Nokia firewall. The router "should" know about the subnet and will arp for
the host on the subnet.
To configure the interface; Voyager > IP address, subnet, speed, duplex,
turn it on (if it's like a Nokia firewall, you have to do this on the main
interface page, and on the logical inteface page). Make sure the link lights
are on in Voyager.

Your routing protocol may have to be told to advertise this subnet to other
routers. Add this subnet using Voyager. If you've already configured the
interface, this may be your problem. If you use static routes, all your
routers will have to be told how to get to this subnet. If you use RIP or
OSPF, once you've added this subnet, it should propogate to your other
routers. If you use a mixture of routing protocols, or static plus one
dynamic protocol, you'll have to figure out where you make the change.

I work with Nokia firewalls and many types of Cisco gear. All of the Nokia
firewalls that I've used do not require anything extra for a local subnet
configuration. They know how to arp and route to a directly connected
subnet. Having said that, last week I had a problem with a new Sun server
that was set to NOT arp. It couldn't get anywhere with a setting like that.
Since Nokia's are UNIX boxes with IP forwarding turned on, maybe your model
needs to be told to arp? Sounds dumb but it worth mentioning. If it doesn't
arp without be told to, then none of your links would work.

<david.stone@citrix.com> wrote in message
news:1111153486.868010.309130@f14g2000cwb.googlegroups.com...
> Hi,
> I think I have a pretty good understanding of networking protocols
> in general, but this is the first time I've actually had to set up a
> router. I'm working with a Nokia IP130.
>
> I've used static routes to create routes so that all traffic
> destined for a particular subnet (e.g. 60.0.0.0/8) is forwarded to
> another router (e.g. 60.1.1.1), and that works as expected.
> However, what if the router is an "end router" (I'm not sure if
> there's a commonly used term for this)...that is, it is connected
> directly to a subnet with a bunch of end-hosts on one of it's
> interfaces, rather than another gateway? In that case I want the
> router to route all the traffic destined for a particular subnet (e.g.
> 60.0.0.0/8) to a particular interface on the router, rather than a
> particular gateway IP (the MAC address corresponding to the gateway IP)
> . That is, I want the router to issue an ARP to get the MAC address of
> the destination IP (e.g. 60.5.19.120).
> This is a valid scenario right?
> I can't figure out how to configure my Nokia IP130 router to do
> this. Using the "voyager" web-based configuration tool, static routes
> can route packets to two types of destinations:
> - "Gateway Address"
> - "Gateway Logical Name"
>
> "Gateway Address" routes to a particular gateway IP which is not
> what I want. Is "Gateway Logical Name" what I want? I just want to
> route to an interface, not another gateway/router!
> Thanks for your patience if you read through this...
>
> Dave
>

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