Can you give us some details of the IP addresses you're trying to use.
Does the Class C network fall within the Class B network you've already
used. ie if you've used 10.10.0.0 255.255.0.0 your Class C addresses can't
start with 10.10.x.x
Regards,
Gaz
""khramov"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> hi,
> I am trying to config 6509 switch. I am adding vlan interfaces to the
> RSM. I've got some Class B addresses and class C addresses. When I add
> a class C address and for s.m. I put 255.255.255.0 it comes back with
> message that /24 is a bad mask for this address. When I put 255.255.0.0
> it accepts it. Will it cause any problems? Is there a problem with
> running class B and class C ip addreses at the same time?
> Switch itself has a class B address.
> Thanks in advance,
> Alex
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