Doh!
Forgot one thing. Make sure you are using the latest version of
GateD(in the RH 5.1distribution). Until recently Linux GateD had
problems with listening to the multicast route information (HELLO
packets), no trouble sourcing it... I've got GateD set up and running
OSPF on about 10 RH 5.0 boxes for compatibility testing with our OSPF
implementation and they've worked flawlessly.
js
> -----Original Message-----
> From: Jason Scherbarth
> Sent: Wednesday, June 24, 1998 3:04 PM
> To: '[EMAIL PROTECTED]'
> Subject: RE: RFC linux as router
>
> 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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