i want to completely deny IPv6 traffic with a 3750 switch.
Is this possible ?
The switch has VLANs configured with IPV4 ACLs.
Can IPv4 ALCs co-exists with some IPv6 ALCs ?
Is there a way to allow IPv4 but not IPv6 ?
Yes you can deny all ipv6 traffic and yes ipv4 acls can exist no problem with ipv6 they are applied differently to the interface
This will show you how to apply ipv6 acls , both ip access-group and traffic-filter can be applied to the same physical/;logical interface
Since its a switch, first you will need to change the SDM template to dual-ipv4-and-ipv6 with the sdm prefer dual-ipv4-and-ipv6 global configuration command. Please note that you will need to reload the switch in order for this change to take effect.
Then you will need to enable IPv6 Routing with the ipv6 unicast-routing global configuration command.