Error configuring DHCP server on SG300

[furtfrank]

Firmware 1.3 introduced a DHCP server.

It seems that I can add a pool for any subnet except the 192.168.1.1/24. I have successfully added a pool for 192.168.0.1/24, 172.16.16.1/24, etc. But when I use the same commands to add a 192.168.1.1/24 pool, I get:

sw(config)#ip dhcp pool network Device

sw(config-dhcp)#address low 192.168.1.20 high 192.168.1.250 255.255.255.0

Illegal IP addresses range or subnet configuration Trying to configure a network pool on default IP interface

VLAN 1 IP was changed from default 192.168.1.254 to a static of 192.168.0.1.

Any ideas?

[David.Aguilar · Accepted solution]

Hello Frank,

Looks like you are experiening bug CQ145102. There is currently no workaround: Sx300 1.3.0 FW Release Notes.

Problem: You cannot configure IP address 192.168.1.0/24 subnet as an address 
pool, other subnets are allowed. (CQ145102)
Solution: There is no workaround.

I would open a case with Cisco Small Business Support, have your case escalated, and see if you can obtain beta FW. The only other alternative would be to redesign your network in order to eliminate subnet 192.168.1.0/24.

Kind Regards,

-David (formerly davidagu)

[furtfrank]

Thanks David. That indeed was my issue. Seems silly that one of the most common subnets can't be used for a pool. I moved to 2.x and all is well. Thanks again.