Bruce Lane wrote:
>
> At 10:34 24-12-2000 -0500, Neil Cherry wrote:
>
> >Let me repeat what 'You' wrote: Um, isn't the gateway the same as the
> >router interface?
>
> Not to my mind. My router, having two Ethernet ports, must have an IP
> address for each of those ports. In order to be a part of the subnet on the
> Cisco side, the port attached to it must have an IP address out of the
> 63.226 block I've been assigned. Ergo, that address is not available for a
> machine.
>
> Yes, my router does full 1:1 NAT mapping and firewalling. The Cisco is not
> capable of anything near as sophisticated, so I'm simply using it for its
> DSU features.
(From a previous message:)
> The 675, based on its configuration, presents the following subnet
> on its Ethernet port.
>
> 63.226.233.136 (Reserved, Network)
> 63.226.233.137 (User-assignable, assigned to the Ethernet port on
> 'MyRouter' by yours truly).
> 63.226.233.138 - 141 (User-Assignable, various machines)
> .142 = Default gateway address on the Cisco side (Reserved).
> .143 = Broadcast (Reserved)
B
A /-----------------\
---+ +-+ +-+ +-+ +--------+
ISP|--|C|---|M|----| |---| Host 1 | <- .138
---+ |i| |y| |H| +--------+
|s| |R| |U| :
|c| |t| |B| +--------+
|o| |r| | |---| Host 5 | <- .141
+-+ +-+ +-+ +--------+
| | |
| | \-> No IP (not really needed)
| \-> .137 (2 interfaces 1 address?)
\-> .142
.136 - reserved, All zeroes broadcast or network (AKA the wire number)
.143 - reserved, All ones broadcast
OK this tells me that MyRouter is acting as a bridge (at layer 3 they're
the same network). Can MyRouter act as firewall and be a bridge?
Because I've done a good job of confusing myself let me ask a really dumb
question. Do you have this working now? My background in network tells me
this shouldn't work. My background in computers tells me that there is a
way to make this work but requires inventiveness on the part of MyRouter.
I have no trouble with everything connected to the hub. My confusion
starts at the MyRouter device, if it is just a router, then this won't
work. If it can firewall/bridge then you're OK. If it's a layer 3 switch/
firwall then you're OK, uhmm I guess ;-). Technology don't you just
love it!
--
Linux Home Automation Neil Cherry ncherry_at_home.net
http://members.home.net/ncherry (Text only)
http://meltingpot.fortunecity.com/lightsey/52 (Graphics)
http://linuxha.sourceforge.net/ (SourceForge)
Received on Sun Dec 24 2000 - 12:02:49 GMT