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changing VLan subnetmask

VLAN MASK

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#1 madona33

madona33

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Posted 30 April 2014 - 08:12 AM

Dear all,

 

I have a question about VLAN subnet mask.

 

We have 10 Vlans at work and would like to change the mask of one of them from 10.0.19.0/24 to 10.0.19.0/19 to have more clients as we are planning to use this vlan for wireless service (this vlan has never been used, so nothing is connected to it).

 

All vlans are configured in 2 cisco core switches / 3750 (main and backup)

 

Could I do this without any problems?

 

If yes, do I need to change it only in both core switches or in both and the DHCP server?

 

Many thanks in advanced.

 

Madona33


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#2 MarkinManchester

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Posted 03 May 2014 - 09:00 PM

You cannot do that, find an online subnet calculator and look at the results when you enter that IP/Mask


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#3 koolpep

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Posted 07 May 2014 - 09:47 PM

what is the other vlans dhcp range ?


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