repost: routing and remote access - why no dhcp options

From: Gary Roach (jgroach_at_NOSPAMcogeco.ca)
Date: 10/09/04 

Date: Sat, 9 Oct 2004 08:54:55 -0400

I'm reposting this because the thread seemed to go dead and i haven't
resolved the problem. basically the idea is that after establishing a PPP
connection between a client and an RRAS server, the client should be able to
see the dhcp server itself (instead of using PPP) so that it could get
additional options like DNS settings. when i establish a RAS connection, i
don't get these options and when i run ipconfig on the client, it shows dhcp
to be disabled on the PPP interface. here's the original thread:

-----------------------------------------------------------------------------

thanks for the advice. i looked at trying to get dhcp to update the ip
settings after ppp had connected but the interface appears to not support
dhcp directly (here is the relevant output from ipconfig/all:)

PPP adapter cervix:

        Connection-specific DNS Suffix . :
        Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
        Physical Address. . . . . . . . . : 00-53-45-00-00-00
        Dhcp Enabled. . . . . . . . . . . : No
        IP Address. . . . . . . . . . . . : 192.168.0.15
        Subnet Mask . . . . . . . . . . . : 255.255.255.255
        Default Gateway . . . . . . . . . : 192.168.0.15
        DNS Servers . . . . . . . . . . . : 192.168.0.1

the client machine is running XP Pro. I also tried it with a demand dial
interface routing connection on another machine running server 2003. it did
the same thing so i installed a relay agent on the original server 2003
machine on the Remote Router interface. i did this because the post that you
referred me to mentioned using a dhcp relay agent. this had no effect. is
there a way to turn on dhcp on the PPP interface? thanks for the help.

"Bill Grant" <not.available@online> wrote in message
news:eRL0lRNrEHA.1992@TK2MSFTNGP09.phx.gbl...
> PPP/PPTP hands out the name server addresses configured on the RRAS
> server when it gives the client its IP address. This is part of the PPP
> negotiation. The RRAS server leases a batch of IPs from DHCP for this
> purpose.
>
> After connection, the client can get settings directly from DHCP if it
> can find the DHCP server.
>
> You might like to look at a current discussion in the
> microsoft.public.w2000.ras_routing ng titled
>
> "DNS server order flipped beyond VPN" from Ghazan Haider
>
> "Gary Roach" <jgroach@NOSPAMcogeco.ca> wrote in message
> news:uoymI6MrEHA.1272@TK2MSFTNGP09.phx.gbl...
>> I'm using routing and remote access and clients get their ip addresses
>> using dhcp. this works fine but they don't get the DNS server address as
>> specified in the dhcp options - they get the one associated with the
>> interface that's specified in the properties of the RRAS server. this
>> seems odd - is there a way to get the dhcp options to work with RRAS?
>> thanks for the help,
>>
>> gary
>>
>>
>> --
>> Gary Roach
>> ADB Services
>>
>>
>
>

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