Re: Network Probs (was Re: Firewall issues)

Rick Warner wrote:

> On Wed, 11 Jun 2003, jdow wrote:
> 
> 
>>Two cards with the same MAC address is deadly. How many other such
>>situations exist on the network? This condition will lead to misdirected
>>and lost packets. So if there is a way to change the MAC address of
>>those cards do so.
>>{^_^}
>>
> 
> 
> Whoa..... no need to light the fires of fear yet.  You can have dozens
> of network cards with the same MAC address *as long as they are on 
> separate networks*.   Let me rephrase that; the only time you cannot have
> two cards with the same MAC address is if they are on the same network.
> MAC address are only visible on the local network; once a packet traverses
> a router, the next device downstream sees the MAC address of the router
> as the source, and so on.  Sun machines use a MAC address in the PROM 
> for all network interfaces; I have worked with Sun boxes with up to
> 16 network interfaces all with the same MAC address.   No problem as each
> interface was on a different network.  

So it would be alright to have eth1 on the lan and eth2 on the 'net? 
Maybe I will have to give that a shot after all..

-- 
Trey Gruel
[email protected]
703-713-1640 x320