DHCP SERVER ISSUE
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-05-2022 07:04 AM - edited 11-05-2022 07:06 AM
I have configured DHCP server in Cisco Switch, with/25 subnet, in which we can use 126 IP addresses for clients. Please find the below snapshot in which Leased is 40 and Excluded address are 100 total 140, how is it possible. What might be the issue.
Configuration
ip dhcp pool pool_name
network 10.206.86.128 255.255.255.128
default-router 10.206.86.129
- Labels:
-
Network Management
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-05-2022 07:05 AM
there is other DHCP Pool conflict with this Pool.
share all DHCP Pool
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-05-2022 07:07 AM - edited 11-05-2022 07:09 AM
Only 1 DHCP is configured as you can see in command sh ip dhc pool output.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-05-2022 07:13 AM - edited 11-05-2022 07:16 AM
config new DHCP pool use any random not use subnet,
do show again
do you see same excluded = 100?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-05-2022 07:15 AM
I will do that and post here.
Note: 100 are excluded address not Leased address.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-05-2022 07:26 AM
No need friend,
I am faster do small lab,
the excluded can come from conflict, so check conflict IP
show ip dhcp conflict
do you see high IP list as conflict ? if Yes then each conflict IP is automatic excluded from Pool.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-05-2022 08:34 PM
Would it be possible to post the configuration of the switch which has the dhcp pool?
Rick

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-06-2022 01:14 AM
Hello,
you also might want to decrease the lease time (to e.g. 12 hours instead of the default 24). Disabling and re-enabling (no service dhcp/service dhcp) might also clear the statistics.
