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New Member

Re: IP Overlapping on 6509

All,

I am trying to apply an ip on a sub vlan interface and I am recieving an error "ip overlap error? Is there an additional function I need to enable?

thx

5 REPLIES

Re: Re: IP Overlapping on 6509

Either you are configuring two different interfaces with the same ip address or between two different interface you have an overlapping ip address due to incorrect masking. post your configuration so we can check for you, if possible do not edit so we can see the true configuration.

Please rate all posts.

New Member

Re: Re: IP Overlapping on 6509

Here they are..

interface FastEthernet6/14

description * Uplink I

ip address 10.10.10.111 255.255.255.0

ip access-group 101 in

interface Vlan711 (would like to assign for instance 10.10.10.112 /24)

no ip address

Thanks

Blue

Re: Re: IP Overlapping on 6509

the address 10.10.10.112/24 is overlapping with 10.10.10.111/24.

both of these addresses reside on the same network, 10.10.10.0/24.

you cannot configure two router interfaces with the same network (aka subnet)

try to configure vlan711 as 10.10.11.112/24. this should work as you now have different subnets/networks defined.

(of course, if you have 10.10.11.0/24 network defined elsewhere, this will still be a problem)

Re: Re: IP Overlapping on 6509

I am sure that you can see that ip address 10.10.10.111 255.255.255.0 and 10.10.10.112 /24 are in the same network 10.10.10.0 /24 and this the reason the switch is complaining that the ip address are overlapping. You can NOT put two different interfaces in the same subnet. You need to figure out your addressing scheme and decide which interface to change to what subnet.

Please rate all posts.

New Member

Re: Re: IP Overlapping on 6509

That makes sense! I just reviewed my 6513 configuration and you both are correct. Due to the fact I just started here I am still getting familiar with the setup and configurations here at the company. I have so much to do in so little time which is throwing my train of thought out the box. -lol

-thanks again for the bright light!

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