What kind if traffic you would like to exclude? By not using IPS filter (prevent oversubscribtion or cpu processing), you basically need filter it out at switch/router/firewall port level.
You can create ACL to filter the unwanted traffic from hitting your IPS interface. But the setback is, you might filter passing through traffic/protocol that is needed by clients/hosts on the other side of the network.
I guess this is where you really need the IPS filter. Basically, your IPS model selection should be suitable for the link & bandwidth that it need to monitor/filter to prevent oversubscription.
Rgds,
AK
