Policies and Filters
Default Filter Actions
By default, no policies or filters are defined on the routing switches and switch. The following table lists the default action when no policy or filter is configured and the default action after you configure a policy or filter. For some types of policies and filters, the default action changes once you configure a policy or filter, regardless of the policy or filter’s contents.
Table C.2: Default Policy and Filter Actions
| Policy or Filter Type | Default action when no policies | Default action after a policy or | |
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| or filters are configured | filter is configured |
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| |
| QoS policy | Queue all packets in normal or 0 | Queue all packets in normal or 0 | |
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|
| priority queue | priority queue unless explicitly |
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| configured for a higher queue |
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| |
| Access policy (see Forwarding | See Forwarding filters | See Forwarding filters | |
| filters) |
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| |
| Forwarding filters | Permit (forward) all packets | Deny (drop) all packets | |
| • | MAC forwarding filters |
| Note: The default action for |
| • | IP forwarding filters |
| AppleTalk zone and network filters |
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| is always permit. To deny all but | ||
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| (same as IP access |
| |
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|
| specific zones, create permit filters | |
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| policy) |
| |
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| for those zones, then create a deny | |
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| |
| • | IPX forwarding filters |
| filter and use the “additional zones” |
| • | TCP/UDP forwarding |
| value with the filter. |
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| ||
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| filters |
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| |
| Permit (forward) all packets | Permit only those packets whose | ||
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| source MAC addresses have been |
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| learned on the port; drop all others |
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| |
| Route filters | Permit (learn and advertise) all | Deny (do not learn or advertise) all | |
| • | IP/RIP route filters | routes or services | routes or services |
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| ||
| • | IP/RIP neighbor filters |
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| • IPX RIP route filters |
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| |
| • IPX SAP service filters |
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| |
| • | AppleTalk zone and |
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| network filters |
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| • | BGP4 address filters |
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| • BGP4 |
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| |
| • | BGP4 community |
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| filters |
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| |
| Route redistribution filter | Do not redistribute routes | Do not redistribute routes unless | |
| • | IP/RIP |
| explicitly redistributed by filter |
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| ||
| • | OSPF |
| Note: For IP/RIP and OSPF, you |
|
| must explicitly enable redistribution. | ||
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| |
| • | BGP4 |
| Redistribution is enabled by default |
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| in BGP4. |
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| |
| Layer 2 broadcast and multicast | Allow outbound broadcasts and | Drop outbound broadcasts or | |
| filters |
| multicasts on the specified ports | multicasts on the specified ports |
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C - 3