[c-nsp] 2 IOS DHCP Questions

[arvindc.cisconsp cisco]

1) AFAIK setting option 1 is not supported on Cisco routers.

That said, one workaround I could think of was to use the correct windows
settings to disable NetBIOS over TCP/IP on the host stack
http://support.microsoft.com/kb/313314

If you have a scaled setup, you could deploy this change using a group
policy and push it out to all your clients assuming they are all a part of a
single domain etc etc.

<http://support.microsoft.com/kb/313314>2) With a Windows DNS Server, the
client "registers" by writing its address into the DNS file. With the Cisco
router serving up addresses there is no such "file". You can either script
out something that looks periodically at the routers show commands and
inserts / deletes appropriate entries into the DNS server.

Take a look at Dynamic DNS
http://www.cisco.com/en/US/docs/ios/12_3/12_3y/12_3ya8/gt_ddns.html to see
if it fits your bill / requirements. (assuming your server supports
DynamicDNS).

my 2c
Arvind

On Fri, Aug 6, 2010 at 4:52 PM, Jeff Wojciechowski <
Jeff.Wojciechowski at midlandpaper.com> wrote:

> All:
>
>
> 1)      This one seems easy but not sure what I am doing wrong - I want to
> have my 2801 routers feed windows clients DHCP option 0001 with a value of
> 0x2 to disable NetBIOS using DHCP
>
> a.       Tried several variations of "option 1 hex 0x00000002" in the dhcp
> pool config
>
> b.      Error message I get back is "% DHCP does not allow raw option 1"
>
> c.       (MS DHCP server says this option is for Win2k but if at all
> possible I want all NetBIOS gone so open to other ideas)
>
> 2)      I would like the same windows DHCP clients of the 2801 routers to
> "register in dns" with the dns servers they are learning via DHCP. When we
> ran centralized DHCP/DNS on the same 2008 servers, we had no issue with
> this. Now that DHCP resides on each local site on the router none of the pcs
> register in DNS.
>
> Pool configuration for both above is:
>
> ip dhcp pool 0
>   network X.X.X.0 255.255.255.0
>   default-router X.X.X.X
>   dns-server X.X.X.X X.X.X.X
>   domain-name *our domain name - just added this option this afternoon at
> my test site but haven't had anyone have time to reboot their pc yet
>
> Router specs:
> 2801 running 12.4(22)T3
>
> Thanks ahead of time for any and all insight...
>
> Jeff
>
>
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