We have all of our in house systems on a 10 network. We had 3 departments
fighting for addresses in the range of 10.0.0.1 - 10.0.0.254. I thought
this was silly, so I decided to move the QNX hosts to 10.1.X.X. After all,
everybody is a 10 net which is class A so they should have no problem
talking to each other.
But Nooooo!
I wasn’t able to ping the NT servers going from 10.1.X.X to 10.0.0.X. OK,
that’s an easy one. The NT servers are configured with a class C netmask.
So just to prove my point I started playing with the IP addresses of my QNX
hosts.
What I found surprised me. It seemed that once QNX’s TCPIP knew or an
IPaddress/MACaddress combination, if I changed the IP address it would no
longer communicate. This was not the way it was in QNX4 / TCPIP V4.
Has this changed? Is it on purpose?
Bill Caroselli (Q-TPS) wrote:
What I found surprised me. It seemed that once QNX’s TCPIP knew or an
IPaddress/MACaddress combination, if I changed the IP address it would no
longer communicate. This was not the way it was in QNX4 / TCPIP V4.
Has this changed? Is it on purpose?
After you changed the IP address did you delete the entry from the arp
cache on the host that you were trying to communicate from ?
Rennie
“Rennie Allen” <rallen@csical.com> wrote in message
news:3CB6401D.1060600@csical.com…
After you changed the IP address did you delete the entry from the arp
cache on the host that you were trying to communicate from ?
No. They don’t trust me to touch the NT servers. (Can you blame them?
What I know about Windows you could print on the edge of a postage stamp.)
But unfortunately our “MIS” guy doesn’t know how to do this either.
Will this information ‘time out’ and go away?
Will a power down and reboot make it go away?
Would taking an ax to the NT servers make them go away? (Wait, maybe that’s
why they won’t let me near them.)
“Bill Caroselli (Q-TPS)” <QTPS@EarthLink.net> wrote in message
news:a976kb$ra5$1@inn.qnx.com…
“Rennie Allen” <> rallen@csical.com> > wrote in message
news:> 3CB6401D.1060600@csical.com> …
After you changed the IP address did you delete the entry from the arp
cache on the host that you were trying to communicate from ?
No. They don’t trust me to touch the NT servers. (Can you blame them?
What I know about Windows you could print on the edge of a postage stamp.)
But unfortunately our “MIS” guy doesn’t know how to do this either.
Same under QNX and NT
arp -d hostname (or ip)
Will this information ‘time out’ and go away?
Will a power down and reboot make it go away?
Would taking an ax to the NT servers make them go away? (Wait, maybe
that’s
why they won’t let me near them.)