Wireless Access

dears

 

i have a problrm with 7210 controller with OS 6.4.0.2 ,the problem is when i open a pool with subnetmask 255.255.0.0 the controller cant accept this so please help me to solve that issue .

 

note :

kindly find attached file ,snap shot for the error 

 

Thanks,

Best Regards,

 

Ehab Atef kamel

Network Engineer 

#7210

Looks like you want a /24 mask, not a /16.

#7210

thank you for your fast respose ,

 

 i have 350 access point in a hotel and alot of users and alot of vlans so i want to make a big pool of dhcp in each vlan ,,

so want /16 not /24 and what if i want to make /8 ,why this error ,i made it before on 3200 MC and no problem ,

 

Best Regards,

 

 

 

#7210

You have overlapping subnets. You'd need to remove the /24 subnets in the 172.16 range before adding the /16.

Also, you should consider using an external DHCP server.
#7210

no problem of /24 mask ,number of access point exceed the number of /24 mask max user 

#7210

i make a new vlan with subnet mask /16 and creat dhcp with /16 mask  but same error 

#7210

What type of controller is this?

 

#7210

It looks like you are facing 2 different issues; both of which Tim has covered. 

 

1. Your fist was that you had overlapping subnets.  You were trying to add a /16 when a /24 already existed.  This may have been in the DHCP pools or your VLAN IPs, make sure you check both.
2. Second, you cannot create a DHCP pool for a /16, the 7210 controller can only be configured with 5000 addresses, while a /16 has 65536.

 

It sounds like you should explore a /23 or /22.   But remember, before doing so you need to remove any /24s (scopes and IPs) that may be in this new range.

#7210