On Monday, April 29, 2002, at 03:54 , Brandon Davis wrote:
> using a known good cable. And connecting to known good ports
> (regardless, I tried a couple of different ones, just in case). The 
> switch
> has three LED's for each port, which indicate connection, speed, and
> activity/collisions. (The Asante connection is "good"/green and is at
> 10MB/yellow, and it does register activity when I ping out ...and the
> different ports all registered the same.)
>
> There's a Macintosh software utility from Asante that sees the card,
> registers the MAC address (the hardware address), and measures various
> Transmit and Receive activities. When I ping the IP address (that I've
> manually set in MacTCP v2.06) from a W2K box on the network, I see that 
> the
> Asante utility starts measuring bytes and packets, etc. (the Windows box
> sends out 4 packets, and the Asante utility receive counter is 
> increased by
> 4).
>
> When I use Apple's MacPing to ping out, the Asante utility shows 
> packets,
> etc are being transmitted.
>
> But there appear to be no acknowledgements ...the 4 being sent from 
> Windows
> aren't ack'd, and the group of 10 sent by the SE/30 (to the gateway's IP
> address) aren't ack'd.
>
> I have a suspicion that I've missed some kind of obvious setup parameter
> ...but as simple as MacTCP is to use, I don't know what that could be.

I'm wondering if it might be something as simple as the netmask.  
Configuring the netmask properly (especially if you use a CIDR network 
instead of the normal Class A/B/C configuration) can be tricky in 
MacTCP... MacTCP wants to force you to use the appropriate netmask for 
the address's Class, instead of allowing you to specify the number of 
mask bits.

If you don't have the netmask set properly, I would imagine you would 
have problems.

That said, an improper netmask (one that is too wide) should still be 
able to ping hosts on the local ethernet segment if they are in a 
narrower IP subnet.  Even a netmask that is too narrow should still be 
able to ping other hosts in its narrow netmask, and maybe even others on 
the segment.  (But I repeat myself somewhat.)

Eagle


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