unknown RAS leases in DHCP server

  • Thread starter Thread starter ffx
  • Start date Start date
F

ffx

sorry for the crosspost in the RAS/routing group, but since i don't have any
reply
there i'm trying here at the networking group ...
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hello all,

I do not use RRAS in my network, but i have a very strange problem:

my dhcp scopes suddenly are full of leases with "unique id" identified as RAS.
in fact i can see, all of my dhcp clients have 2 leases, one working active
(ping ok)and the one identified as RAS (some seconds older and not in use).

it's amazing i even have leases for machines with FIXED ips !

my setup is a win2k sp4 server native domain with 2 domain controllers, one
per company site. domain dhcp client computers are winxp pro sp2.

i have a 1Gbps cisco switched network with two vlans with 24bits C class
subnets. dhcp requests for each subnets are forwarded with ip helper addr.



- where does those requests come from ?
- why do i have leases for fixed ip machines ?

i've tried the "netsh ras ip set addrassign pool" with no success.

any help or advice will be very appreciated.
thanks in advance for your time.
 
It is supposed to be that way.

RRAS has Connection Ports (usually PPTP and L2TP). They have nothing to do
with TCP Ports.

Every active port in RRAS gets and IP# ahead of time *before* it is ever
used. Therefore you should reduce the number of these ports to equal or be
slightly above the expected number of simultaneous connects you expect so
that they do not needlessly eat up all of your IP# that you may need
elsewhere. If you only have 5 remote users connecting in, then you don't
need 25 PPTP ports and 25 L2TP ports eating up 50 addresses.

You can delete the DHCP Entries if you want,..especially the questionable
ones. If they are supposed to be there they will be recreated the next time
the machine is started up.


--
Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
 
hi,

first, thank you very much for reply ..

now, who can rras server reserve leases in the dhcp server if i never
enabled rras ?
i can't get the concept ...

is there a way to avoid those leases from getting reserved ?

i've tried to disable the rras service but it simply cuts down network
access to the server.

any advices very welcome

cheers.
 
now, who can rras server reserve leases in the dhcp server if i never
enabled rras ?
i can't get the concept ...
Click to expand...

It is enabled somewhere. It can be on any server.
is there a way to avoid those leases from getting reserved ?
Click to expand...

Don't install RRAS,..or leave it disabled.
i've tried to disable the rras service but it simply cuts down network
access to the server.
Click to expand...

What does RRAS have to do with accessing the server over the network? RRAS
is designed for Remote Access and to operate as a LAN Router. That's why it
is called Routing and Remote Access Services. I guess you will have to
explain what RRAS is doing there to start with.

--
Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
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my ras server looks disabled in mmc, but for some reason it isn't.

check out some commands :

C:\WINNT>netsh ras ip show config
config. IP RAS
Modo de negociación: allow
Modo de acceso: all
Modo de petición de dirección: deny
Método de asignación: pool
Grupo:
172.17.254.1 to 172.17.254.100

C:\WINNT>netsh ras show registeredserver

El servidor ras no está registrado (the ras server is not registered):
RAS Servidor: UNIVDC
Dominio: unidc.local
 
I don't trust Netsh commands at all. I would rather let a "newbe" play with
regedit than fool with Netsh.

Uninstall RRAS from the machine if it has no purpose there. If problems
arise due to RRAS not being there, then solve them one at a time instead of
putting RRAS back on it.

--
Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
-----------------------------------------------------
 
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