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RRAS modem conundrums

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by james szabadics 1 view

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Recently configured a RRAS server on Win2k

Dial in working perfectly for 3 days until somebody complained this morning re errors.

The configuration was examined and NOW the modems no longer negotiate incoming connections. The modems just makereally stupid screeching after an initial 5 second normal negotiation. Doesnt matter if we use win98 win xp clients with diffferent modems etc.

I can dial out with hyperterminal from the win2k server. It seems that the RRAS settings are preserved in the registry so removing and readding doesnt help. Tried a known good external modem on this server and it does the same thing.

Can someone recommend a Win2k RRAS troubleshooting process?

12 replies

by cul8rm8e

If your Ip addressers are issued to clients dialing in by DHCP check that you either have enough IP`s to allocate in your scope and or the lease duration, which could be hogging IP`s and dont have any more to issue which would cause errors trying toauthenticate.
If your RAS server issues IP`s through a STATIC address pool also make sure theres enough to go round and these are being released on disconnection.

post back here with more info and we can help you out if this aint the case.

by james szabadics

We have 40 workstations and 253 addresses with a 3 day expiry. DHCP is serving addresses correctly to LAN users. I believe it is not a DHCP issue but an RRAS issue.

by joseph moore

I know a problem I have had with RRAS and external modems is that sometimes the RRAS box will have duplicate modem entries in the Phone and Modem Control Panel applet.
For example, it will list on COM1 a USR 56K External modem. What it will also dosometimes is list a Standard 56K modem on COM1.
Yep, a phantom modem on the same port.
When this happens, my modems won't answer.

So, check out the Control Panel applet for phantom modems. Remove them, and leave only the correct ones listed. That takes care of it for me.

BTW, I see this when I reboot the server. When it comes up, sometimes phantom modems.

hope this helps

by james szabadics

We looked at the modems and all appear normal. No phantoms and diagnostics successful. Hyperterminal can dial out successfully.

by cul8rm8e

ok! correct me if im way off here, you have 40 clients (internal)being issued with IP`s from DHCP server. yes?
All your RAS clients are also being issued Dynamically assigned IP`s from the same scope of the DHCP server. yes? Or have you got an exclusion range of IP`s from your scope Ie: for RAS clients and have created a Static pool of IP`s under RAS properties for your RAS clients to dial in?
Also have you checked your RAS policies for restrictions?

I know this is more quentions that an answer but im just trying to get the big picture of how you have configured RAS.

last byt not least,what are te errors your recieving on the client side when trying to connect? you say you get the normal screaching then the errors.

by cul8rm8e

ok! correct me if im way off here, you have 40 clients (internal)being issued with IP`s from DHCP server. yes?
All your RAS clients are also being issued Dynamically assigned IP`s from the same scope of the DHCP server. yes? Or have you got an exclusion range of IP`s from your scope Ie: for RAS clients and have created a Static pool of IP`s under RAS properties for your RAS clients to dial in?
Also have you checked your RAS policies for restrictions?

I know this is more quentions that an answer but im just trying to get the big picture of how you have configured RAS.

last but not least,what are te errors your recieving on the client side when trying to connect? you say you get the normal screaching then the errors.

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