Running out of IP addresses
We have a class c network and naturally have now run out of ip addresses. We were thinking of switching to a class B network which would give us over 16 thousand IP's. Are there any performance hits or cons with this configuration?
March 1st, 2011 5:31pm

The performance issue will occur as you continue to add hosts on the same logical segment. Keep in mind that even though you are probably using switches in your network, you still have one broadcast domain in a logical network segment (which means that broadcast traffic is replicated to each port). As you add more computers to that logical segment, the traffic will increase. There are no performance issues just by changing the subnet mask itself. You don't have any layer 3 (routers) to create additional segments on the network?Visit: anITKB.com, an IT Knowledge Base.
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March 1st, 2011 7:04pm

I know that Cisco say's try to avoid subnets greater then 500 hosts, and I remember that Microsoft says the same. this to avoid to much broadcast trafic in you vlan. regards, Eric
March 2nd, 2011 6:19am

Hi Why dont you implement vlans and create diffent subnets, configure different DHCP scopes on your server and configure relay agents on the routers where your vlans connect to and so on and so forth. Vlans help you reduce brodcast traffic by placing hosts in different broadcast domains and also you can manage your address space so that you have enough hosts in any given vlan/subnet and inturn do not run out of ip addressestech-nique
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March 2nd, 2011 6:38am

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