DHCP Server Problem on IOS

I have a dhcp server running on a router. Here is the config:

ip dhcp pool HotSpot
network 192.168.0.128 255.255.255.128
domain-name joshuagibson.com
dns-server 192.33.4.12 199.166.31.3
default-router 192.168.0.130
lease 0 1

If I do "show ip dhcp pool" I get this:

Pool CSCM_Vendor_HotSpot :
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 126
Leased addresses : 2
Pending event : none
1 subnet is currently in the pool :
Current index IP address range Leased addresses
0.0.0.0 192.168.0.129 - 192.168.0.254 2

My question is:

Why does my CURRENT INDEX keep turning to 0.0.0.0 when only 2 addresses are leased?

I think there is an IOS bug.

Any help understanding this will be appreciated!

Josh Gibson, CCNA

Find more posts tagged with

Save $250 on 2025 certification boot camps from Infosec!

Book now with code EOY2025

Button

Comments

larkspur

did you define a ip dhcp database?

gibby1801

I sure did not. What exactly is a dhcp database?

larkspur

The dhcp databsae provides the ability to dynamicaly configure options such as dns and wins.

i have always created the dhcp database before i configure the dhcp pool.

I looked at the output from your sh ip dhcp pool and compared to one of mine.

my indexes were popoulated.

Pool int-192.168.111 :
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 62
Leased addresses : 19
Pending event : none
1 subnet is currently in the pool :
Current index IP address range Leased addresses
192.168.111.1 192.168.111.1 - 192.168.111.62 19

dhcp database
ip dhcp database 192.168.111.0
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.111.1 192.168.111.16

depending on what typre of nodes you're servering dhcp to this may not be an issue. check the link for mor einfo on dhcp databsae.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ip_r/iprprt1/1rddhcp.htm

HTH!!

Grym

Hmm, i don't have a DHCP database set up but as you can see I have the current index showing...

Pool DHCP-POOL :
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 254
Leased addresses : 1
Pending event : none
1 subnet is currently in the pool :
Current index IP address range Leased addresses
192.168.200.7 192.168.200.1 - 192.168.200.254 1

here is my config for dhcp:

Main_Router#show run | begin dhcp
no ip dhcp conflict logging
ip dhcp excluded-address 192.168.200.1 192.168.200.4
!
ip dhcp pool DHCP-POOL
network 192.168.200.0 255.255.255.0
dns-server 68.94.156.1 68.94.157.1
default-router 192.168.200.1
domain-name xxxxxxxxx

One thing you might want to try taking out is the command lease 0 1, I know this just changes your lease to one hour, but it might be conflicting with your index number...then again probably has nothing to do with it..

HTH