04-18-2013 02:22 PM - edited 03-07-2019 12:54 PM
hello, I have a DHCP server for a subnet that has only lightweight WAP's in it. The DHCP server is running on the gateway for this subnet which is a 3750X 2 switch stack running 12.2(53r)se2.
I have the following configured:
ip dhcp excluded-address 10.1.10.161 10.1.10.162
ip dhcp pool DHCP-VL20
network 10.1.10.160 255.255.255.224
domain-name mydomain.net
dns-server 10.11.11.30 10.11.11.40
default-router 10.1.10.161
lease 3
The server hands out up to 18 IP addresses and no more, with 20 devices on the subnet. Scanning the subnet with a 3rd party network management system I see the following IP's never get handed out or used:
10.1.10.161 - 162 (manually excluded)
10.1.10.167 - 168
10.1.10.171 - 176
10.1.10.178
and of course 2 IP's I have manually excluded, 11 IP's in all that wont get handed out. It should only be 2 that don't get handed out. I've double and triple checked the exclusion and thats the only one. so I run a 'sh ip dhcp pool' and see this:
Pool DHCP-VL20 :
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 30
Leased addresses : 18
Excluded addresses : 11
Pending event : none
1 subnet is currently in the pool :
Current index IP address range Leased/Excluded/Total
10.1.10.166 10.1.10.161 - 10.1.10.190 18 / 11 / 30
[edit]
I should also mention that "sh ip dhcp bind" does not show these randomly excluded IP's in use. They also do not show up in any arp table I can find.
[/edit
I have looked all over the config and I cant find where these extra 9 addresses are being excluded. Does anyone have any ideas how to free up these 9 seemingly random exclusions? Haven't issued a reload and I haven't deleted and rebuilt the DHCP server yet, production network.
*confused*
Message was edited by: Eric Hansen
Solved! Go to Solution.
04-18-2013 11:53 PM
Hi,
do they appear in the conflict logging ? ---> sh ip dhcp conflict logging
can you also show us the output of sh ip dhcp server statistic
Regards
Alain
Don't forget to rate helpful posts.
04-18-2013 11:53 PM
Hi,
do they appear in the conflict logging ? ---> sh ip dhcp conflict logging
can you also show us the output of sh ip dhcp server statistic
Regards
Alain
Don't forget to rate helpful posts.
04-19-2013 07:17 AM
AHH! That was it, they were in the conflict list. I ran a "clear ip dhcp conflict *" and everything is peachy now. Thanks!
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