I have a Cisco Catalyst 4506-E Swtich,
I configure it as a DHCP and gw for the Wireless Cisco AP through the WLC 5508,
the DHCP pool reached the maximum limit
I run the Show ip dhcp pool (pool name)
it's show the below result
GIR906.PCIRQ.DC.CR.1#show ip dhcp pool 406
Pool 406 :
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 126
Leased addresses : 76
Excluded addresses : 54
Pending event : none
1 subnet is currently in the pool :
Current index IP address range Leased/Excluded/Total
0.0.0.0 10.114.42.129 - 10.114.42.254 76 / 54 / 126
You can see the Excluded IP are 54
i check the excluded range it was
ip dhcp excluded-address 10.114.42.245 10.114.42.254
you can see that i'm exclude only 9 ip address
thanks in advanced,
Solved! Go to Solution.
many thanks for your reply, I really appreciate your effective troubleshooting,
you are wright I found around 44 conflict on this dhcp pool address, as below
10.114.42.134 Ping Nov 08 2012 10:46 AM
10.114.42.130 Gratuitous ARP Nov 07 2012 01:15 AM
is this normal ?
What is the reason behind all these conflicts?
was your switch ever reloaded? can you ping the first one and then do sh arp to see its mac and then trace it.
Don't forget to rate helpful posts.
A bit late, however, for others who will encounter the issue, IP conflicts appear often, you can see them with:
sh ip dhcp conflicts
The addresses in conflict are removed from the pool so they will not be used until conflicts are cleared. to clear them use:
clear ip dhcp conflicts *
Hope it helps
Is there a way to prevent this?
I have several switches giving out DHCP. They often max out their scope due to these excluded addresses. I've been doing the clearing but they return.
Isn't there some lease setting or option to release these or clear them automatically after a certain amount of time?