DHCP Pool

Dale812 · June 2017

Setting up DHCP pools for the 3 networks below:

192.168.0.0-7 /29
192.168.0.8-15 /29
192.168.0.16-47 /27

I set the pools up for the first two /29 networks and are assigned to the correct range of IP's but when I setup the pool for the /27 network it sets the pool range at 192.168.0.1 - 192.168.0.30. Any idea's? Cheers!

Router-1(dhcp-config)#do sh ip dhcp pool

Pool Management:
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 6
Leased addresses : 4
Excluded addresses : 3
Pending event : none

1 subnet is currently in the pool
Current index IP address range Leased/Excluded/Total
192.168.0.1 192.168.0.1 - 192.168.0.6 4 / 3 / 6

Pool Marketing:
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 6
Leased addresses : 2
Excluded addresses : 3
Pending event : none

1 subnet is currently in the pool
Current index IP address range Leased/Excluded/Total
192.168.0.9 192.168.0.9 - 192.168.0.14 2 / 3 / 6

Pool Sales:
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 30
Leased addresses : 0
Excluded addresses : 3
Pending event : none

1 subnet is currently in the pool
Current index IP address range Leased/Excluded/Total
192.168.0.1 192.168.0.1 - 192.168.0.30 0 / 3 / 30

tunerX · June 2017

You are crossing bit boundaries.

/27

0-31, 32-63, etc...

do the address and mask in a binary "AND" and you will see where the boundaries are.

mikeybinec · June 2017

bit boundaries.... in other words, block sizes.. You can't do sizes of 8 than jump to a 32.. best to do the large block first than the 8s..If you have to stick with the 32, than start it at the .32 IP address after the 8 block size

DHCP Pool

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