Default Protocol Filtering Configuration; Configuring Protocol Filtering - Cisco WS-C4003 - Catalyst 4000 Chassis Switch Software Configuration Manual

Default Protocol Filtering Configuration

For example, if a host that supports both IP and Internetwork Packet Exchange (IPX) is connected to a
switch port configured as auto for IPX, and the host is transmitting only IP traffic, the port to which the
host is connected will not forward any IPX flood traffic to the host.
However, if the host transmits an IPX packet, the supervisor engine software detects the protocol traffic
and the port is added to the IPX group, allowing the port to receive IPX flood traffic. If the host does not
send any IPX traffic for more than 60 minutes, the port is removed from the IPX protocol group.
By default, ports are configured to on for the IP protocol group. Typically, you should only configure a
port to auto for IP if there is a directly connected end station connected to the port. The default port
configuration for IPX and Group is auto.
Packets are classified into these protocol groups:
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•
•
•
Default Protocol Filtering Configuration
Table 18-1
Table 18-1 Protocol Filtering Default Configuration
Feature
Protocol filtering
ip mode
ipx mode
group mode

Configuring Protocol Filtering

These sections describe how to configure protocol filtering on Ethernet, Fast Ethernet, and Gigabit
Ethernet ports:
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•
Software Configuration Guide—Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4
18-2
IP (ip)
IPX (ipx)
AppleTalk and DECnet (group)
Packets not belonging to any of these protocols
shows the default protocol filtering configuration.
Configuring Protocol Filtering, page 18-3
Disabling Protocol Filtering, page 18-3
Chapter 18
Default Value
Disabled
on
auto
auto
Configuring Protocol Filtering
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