[c-nsp] DHCP Problems - Static

Paul Stewart pauls at nexicom.net
Fri Oct 29 06:22:12 EDT 2004


Hi there..

At one of our sites we use DHCP server from IOS.  Dynamically assigning IP's
from a pool works fine.  Now, we have a need for some static customers so I'm
trying to get it to work and running into problems... 

Our dynamic pool looks like this (public IP's translated to private to protect
the innocent):

ip dhcp excluded-address 192.168.0.1 192.168.0.19
!
ip dhcp pool wireless
   import all
   network 192.168.0.0 255.255.255.0
   default-router 192.168.0.5
   dns-server 216.168.96.10 216.168.96.13
   domain-name nexicom.net
   lease 0 1

That works fine...:)

Now, we've added a static customer on this system and supplied them with a
Cisco router etc.

>From their router I can see the following:

gw-nnr#sh interfaces e1
Ethernet1 is up, line protocol is up
  Hardware is PQUICC_FEC, address is 0002.1764.7add (bia 0002.1764.7add)

etc. etc...

So I created the following:

ip dhcp pool Nightingale
   host 192.168.0.19 255.255.255.0
   client-identifier 0002.1764.7add
   default-router 192.168.0.5
   dns-server 216.168.96.10 216.168.96.13
   domain-name nexicom.net

I tried this with client-identifier and also hardware-address statements...

This static entry doesn't work and I"m confused why...

When I look at our existing dhcp leases I see:

gw-pop-bridgenorth#sh ip dhcp binding
Bindings from all pools not associated with VRF:
IP address          Client-ID/              Lease expiration        Type
                    Hardware address/
                    User name
192.168.0.19      0002.1764.7add          Infinite                Manual
192.168.0.24      0100.1195.0070.35       Oct 29 2004 06:50 AM    Automatic
192.168.0.90      0063.6973.636f.2d30.    Oct 29 2004 06:55 AM    Automatic
                    3030.322e.3137.3634.
                    2e37.6164.642d.4574.
                    31


The dynamic entry for .90 is actually the customer I"m trying to get on a
static lease...  Do I copy the client-id, hardware address or username that is
showing up into my static entry to make this work?

Confused..:)

Thanks for any help

Paul




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