Messages in this thread | | | Date | Tue, 16 Apr 1996 01:15:55 +1000 (EST) | From | David Monro <> | Subject | Re: IP forwarding and ICMP redirects |
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[lots deleted] Marc Roger said: > > What if I have the following topology: > > ----- ----- ----- > | A | | B | | C | > -+--- --+-- --+-- > | | | > -----+------------+---------------------+-------+------ > | > --+-- > | D | > --+-- > | > ------------------+------------------------------------- > > A, B (def. gw), C being routers, and D being a Linux router and terminal server. > Assuming thta A,B,C and D don't run a routing protocol, doesn't D need both > IP_forwarding and ICMP redirects processing for optimal use ?
Depends. I believe gated etc will solve this, but it may be overkill. If you have a small number of machines, or all of a subnet, behind D, you can simply proxy arp for them at D (ie D responds to arp requests on behalf of the machines behind it with its own hardware address and forwards the packets). As far as machines A, B and C are concerned everything behind D appears to be on the local net. All machines behind D use D as the default router. This is how I handle my network at home living off a PPP connection a machine on the net at work; the rest of the machines at work just see my machines as if they were local, meaning I don't have to mess with the gateway at work. Works a charm.
Oh, all this assumes that A, B and C have all of D and the things behind it covered by a route out the local interface.
David > > -- > Marc Roger >
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