yhsieh@cadence.cadence.com (Tommy Hsieh) (03/21/91)
Hi,
We are testing sub-net over here using an isolate small network
which contains 5 machins. We divide these machines into two groups.
The network structure is something like this.
(physical ethernet network)
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| | | | |
======= ======= ======= ======= =======
| 1 | | 2 | | 3 | | 4 | | 5 |
======= ======= ======= ======= =======
The IP addresses are these :
1 : 140.75.8.1 4 : 140.75.16.1
2 : 140.75.8.2 5 : 140.75.16.2
3 : 140.75.8.3
The netmask is fffff8 and we use 1 and 4 as routers to route
packets between these two subnets. All the machines have routed running.
1 and 4 do not have two Ether-Cards. That means it is still a flat net.
The problem we found out is :
Q) 1 and 4 never broadcast the route information so other machines
on their same subnet never pick up the route information.
Does this mean the router has to have Ether-Cards ? What's the
requirment to setup a router ?
Q) Do we have to separate the network like this ? Add another
Ether-Card to 1 and make it as a router. Will it broadcast
the route information ? If yes. Why ? Does this means
routed will take a look at how many interfaces the machine
has then decides whether it is a router or not ?
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| | | | | |
======= ======= ======= ======= =======
| 2 | | 3 | | 1 | | 4 | | 5 |
======= ======= ======= ======= =======
Any suggestion is very appreciated.
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I Tommy Hsieh I Cadence Design System, Inc. I
I (408) 944-7869 I 535 River Oak Parkway I
I I San Jose, CA 95134 I
I mail address : I
I yhsieh@cadence.com I
I ...!{versatc,apollo,ucbcad,uunet}!cadence!yhsieh I
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