Filter
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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
or filters are configured
Default action after a policy or
filter is configured
QoS policy Queue all packets in normal or 0
priority queue
Queue all packets in normal or 0
priority queue unless explicitly
configured for a higher queue
Access policy (see Forwarding
filters)
See Forwarding filters See Forwarding filters
Forwarding filters
• MAC forwarding filters
• IP forwarding filters
(same as IP access
policy)
• IPX forwarding filters
• TCP/UDP forwarding
filters
Permit (forward) all packets Deny (drop) all packets
Note: he default action for
AppleTalk zone and network filters
is always permit. To deny all but
specific zones, create permit filters
for those zones, then create a deny
filter and use the “additional zones”
value with the filter.
Address-lock filter Permit (forward) all packets Permit only those packets whose
source MAC addresses have been
learned on the port; drop all others
Route filters
• IP/RIP route filters
• IP/RIP neighbor filters
• IPX RIP route filters
• IPX SAP service filters
• AppleTalk zone and
network filters
• BGP4 address filters
• BGP4 AS-path filters
• BGP4 community
filters
Permit (learn and advertise) all
routes or services
Deny (do not learn or advertise) all
routes or services
Route redistribution filter
• IP/RIP
• OSPF
• BGP4
Do not redistribute routes Do not redistribute routes unless
explicitly redistributed by filter
Note: or IP/RIP and OSPF, you
must explicitly enable redistribution.
Redistribution is enabled by default
in BGP4.
Layer 2 broadcast and multicast
filters
Allow outbound broadcasts and
multicasts on the specified ports
Drop outbound broadcasts or
multicasts on the specified ports
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