Problem with Siemens IP Telephony and DHCP Vendor Option 43

There is following problem:

We have a new Siemens VOIP telephony system.
Therefore we need to include following vendorspecific DHCP option (43) in
our normal dhcp scope, to move the telephony clients to a seperate telephony
scope.
01 0A 53 69 65 6D 65 6E 73 00 00 00 02 04 00 00 00 03 00 00 00 00 00 FF
option 43 set in DHCP User Class

There are now 2 large problems:
1) like in request
http://groups.google.at/group/micros...0d207abb52711b
is there a solution to above problem (IP release)? What can be done

2) we also have PXE (INTEL) clients on this scope and we have seperate RIS
and DHCP servers. PXE Booting isnt working now on all Intel Network cards,
after the option 43 has been set to Siemens.
Is there a way to provide more than one Vendor specified option via DHCP
Option 43. Please give us an example.

I just finished working through a similar problem with a poster below. you
should read through that thread first, just in case something pops up that
useful to you.

Re: dhcp vendor classes option

Also, pay special attention to the suggestion of keeping the phones in a
separate VLAN, which would solve your problem automatically. It's a best
practice, and is more managemable and secure than keeping the phones in the
same subnet as your workstations.

Oliver

"Robert Riegler" <(E-Mail Removed)> wrote in message
news:268BEEA1-6E93-4285-8BE9-(E-Mail Removed)...
> There is following problem:
>
> We have a new Siemens VOIP telephony system.
> Therefore we need to include following vendorspecific DHCP option (43) in
> our normal dhcp scope, to move the telephony clients to a seperate
> telephony
> scope.
> 01 0A 53 69 65 6D 65 6E 73 00 00 00 02 04 00 00 00 03 00 00 00 00 00
> FF
> option 43 set in DHCP User Class
>
> There are now 2 large problems:
> 1) like in request
> http://groups.google.at/group/micros...0d207abb52711b
> is there a solution to above problem (IP release)? What can be done
>
> 2) we also have PXE (INTEL) clients on this scope and we have seperate RIS
> and DHCP servers. PXE Booting isnt working now on all Intel Network cards,
> after the option 43 has been set to Siemens.
> Is there a way to provide more than one Vendor specified option via DHCP
> Option 43. Please give us an example.
>
>

Hello Oliver,

We move with option 43 (in DHCP Users vendor class) the telephones to the
other dhcp scope, this works good.
so after the move they are in a seperate dhcp scope.

but the other problems arise:
RIS /PXE isn´t working any more with INTEL PXE clients (because this feature
also uses option 43)
on each shutdown of a Windows XP client, the client releases his IP address

We also tried to generate the option 43 in in the Vendorclass the Telephone
uses, then everything in the network is okay, but then the telephones don´t
move any more to the telephony scope.

Thts the problem.
We also contactet Siemens (they work on a solution), but until now there is
no solution.


"Oliver O'Boyle" wrote:

> I just finished working through a similar problem with a poster below. you
> should read through that thread first, just in case something pops up that
> useful to you.
>
> Re: dhcp vendor classes option
>
> Also, pay special attention to the suggestion of keeping the phones in a
> separate VLAN, which would solve your problem automatically. It's a best
> practice, and is more managemable and secure than keeping the phones in the
> same subnet as your workstations.
>
> Oliver
>
> "Robert Riegler" <(E-Mail Removed)> wrote in message
> news:268BEEA1-6E93-4285-8BE9-(E-Mail Removed)...
> > There is following problem:
> >
> > We have a new Siemens VOIP telephony system.
> > Therefore we need to include following vendorspecific DHCP option (43) in
> > our normal dhcp scope, to move the telephony clients to a seperate
> > telephony
> > scope.
> > 01 0A 53 69 65 6D 65 6E 73 00 00 00 02 04 00 00 00 03 00 00 00 00 00
> > FF
> > option 43 set in DHCP User Class
> >
> > There are now 2 large problems:
> > 1) like in request
> > http://groups.google.at/group/micros...0d207abb52711b
> > is there a solution to above problem (IP release)? What can be done
> >
> > 2) we also have PXE (INTEL) clients on this scope and we have seperate RIS
> > and DHCP servers. PXE Booting isnt working now on all Intel Network cards,
> > after the option 43 has been set to Siemens.
> > Is there a way to provide more than one Vendor specified option via DHCP
> > Option 43. Please give us an example.
> >
> >
>
>
>

The article you told me, tells about to use option 60,..
Thats no good because if you set these RIS isn´t any more supported by
microsoft (wont work) , there is a KB article to this:
http://support.microsoft.com/kb/259670/en-us

So its of no use, because we need RIS installation server in our environment

"Oliver O'Boyle" wrote:

> I just finished working through a similar problem with a poster below. you
> should read through that thread first, just in case something pops up that
> useful to you.
>
> Re: dhcp vendor classes option
>
> Also, pay special attention to the suggestion of keeping the phones in a
> separate VLAN, which would solve your problem automatically. It's a best
> practice, and is more managemable and secure than keeping the phones in the
> same subnet as your workstations.
>
> Oliver
>
> "Robert Riegler" <(E-Mail Removed)> wrote in message
> news:268BEEA1-6E93-4285-8BE9-(E-Mail Removed)...
> > There is following problem:
> >
> > We have a new Siemens VOIP telephony system.
> > Therefore we need to include following vendorspecific DHCP option (43) in
> > our normal dhcp scope, to move the telephony clients to a seperate
> > telephony
> > scope.
> > 01 0A 53 69 65 6D 65 6E 73 00 00 00 02 04 00 00 00 03 00 00 00 00 00
> > FF
> > option 43 set in DHCP User Class
> >
> > There are now 2 large problems:
> > 1) like in request
> > http://groups.google.at/group/micros...0d207abb52711b
> > is there a solution to above problem (IP release)? What can be done
> >
> > 2) we also have PXE (INTEL) clients on this scope and we have seperate RIS
> > and DHCP servers. PXE Booting isnt working now on all Intel Network cards,
> > after the option 43 has been set to Siemens.
> > Is there a way to provide more than one Vendor specified option via DHCP
> > Option 43. Please give us an example.
> >
> >
>
>
>

"Robert Riegler" <(E-Mail Removed)> wrote in message
news22C355E-C301-47CD-B10F-(E-Mail Removed)...
> The article you told me, tells about to use option 60,..
> Thats no good because if you set these RIS isn´t any more supported by
> microsoft (wont work) , there is a KB article to this:
> http://support.microsoft.com/kb/259670/en-us
>
> So its of no use, because we need RIS installation server in our
> environment

If you put your phones in their own subnet, WITHOUT any computers in that
subnet, you do not need RIS in that subnet any more...

However, I wasn't suggesting you use options 60. Options 60 is what the
other poster was using. The same theory applies to both problems, however.

Thanks,
Oliver

>
> "Oliver O'Boyle" wrote:
>
>> I just finished working through a similar problem with a poster below.
>> you
>> should read through that thread first, just in case something pops up
>> that
>> useful to you.
>>
>> Re: dhcp vendor classes option
>>
>> Also, pay special attention to the suggestion of keeping the phones in a
>> separate VLAN, which would solve your problem automatically. It's a best
>> practice, and is more managemable and secure than keeping the phones in
>> the
>> same subnet as your workstations.
>>
>> Oliver
>>
>> "Robert Riegler" <(E-Mail Removed)> wrote in
>> message
>> news:268BEEA1-6E93-4285-8BE9-(E-Mail Removed)...
>> > There is following problem:
>> >
>> > We have a new Siemens VOIP telephony system.
>> > Therefore we need to include following vendorspecific DHCP option (43)
>> > in
>> > our normal dhcp scope, to move the telephony clients to a seperate
>> > telephony
>> > scope.
>> > 01 0A 53 69 65 6D 65 6E 73 00 00 00 02 04 00 00 00 03 00 00 00 00
>> > 00
>> > FF
>> > option 43 set in DHCP User Class
>> >
>> > There are now 2 large problems:
>> > 1) like in request
>> > http://groups.google.at/group/micros...0d207abb52711b
>> > is there a solution to above problem (IP release)? What can be done
>> >
>> > 2) we also have PXE (INTEL) clients on this scope and we have seperate
>> > RIS
>> > and DHCP servers. PXE Booting isnt working now on all Intel Network
>> > cards,
>> > after the option 43 has been set to Siemens.
>> > Is there a way to provide more than one Vendor specified option via
>> > DHCP
>> > Option 43. Please give us an example.
>> >
>> >
>>
>>
>>