Essentially dead on. Small edits below...
> -----Original Message-----
> From: William T Wilson [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, June 24, 1998 2:32 PM
> To: [EMAIL PROTECTED]
> Subject: Re: RFC linux as router
>
> On Tue, 23 Jun 1998, dreamwvr wrote:
>
> > linux box as a router? Would like to ideally get intimate with using
>
> > bgp and ospf using red hat as a router over 100 base T. Is this
> > different than setting up two nics and doing route add and default
> route?
>
> No. bgp and ospf are routing protocols. When you run a routing
> protocol,
> you typically have at least three network interfaces (and 64MB of RAM
> :) )
> in your system. One or more for your local network(s) and at least
> two
> for connectivity to the rest of the Internet.
[Jason Scherbarth] Depends on what you are doing...
> Suppose you have two uplinks to the Internet - one through MCI, and
> one
> through Sprint, say. You needs some sort of protocol by which you can
> determine which sites should be reached through the MCI link, and
> which
> sites should be reached through the Sprint link. Obviously sites
> connecting to MCI or Sprint will go through that link, but sites on,
> say,
> UUNet will have to go through one or the other. The routing protocols
> are
> how the routers determine which sites go through which links. All the
> routers on the Internet maintain a database of, essentially, how
> "expensive" it is to connect to any other site through any particular
> link. Every router simply sends the data through the cheapest link.
>
> BGP is the protocol used internet-wide for such calculations.
[Jason Scherbarth] BGP is essentially a Cisco proprietary
routing protocol. GateD *does* work with BGP, but you'll find that alot
of other vendor's network equipment does not. OSPF is more open in the
sense that many more vendors will support it. OSPF is
> used in other WAN situations. For example, suppose you have a large
> WAN
> with many ISDN lines coming in, and several terminal servers for them.
> Each of those terminal servers functions as the gateway for all
> networks
> attached to them over an ISDN link. But the networks on the far side
> of
> the ISDN connections don't know when they'll connect or who they'll
> get
> when they dial in. So the terminal server uses OSPF to tell the other
> systems in the network that he is the current gateway to that
> particular
> subnet. But the rest of the Internet doesn't care, because once it
> gets
> to your WAN, that's all it needs to know. Therefore BGP is used at
> your
> router to connect to the rest of the internet, and OSPF is typically
> used
> internally within an organization.
>
> Cisco routers excel at this sort of thing. gated can do it too.
>
> > I suppose i will have to do a arp -s ext interface mac address 1
>
> I don't think so. You shouldn't need to fool with the arp table at
> all.
>
> > but am really not sure if there is any more to it. Hmmm... also do
> > i have to do a make config to rebuild the kernel to do this? Been
>
> You should. Any time you do anything serious you should rebuild the
> kernel. :) In particular look at the "optimize as router, not host"
> compile-time option.
>
>
> --
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