Cisco WS-C4003 Software Guide - Page 266
Default Protocol Filtering Configuration, Configuring Protocol Filtering
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Default Protocol Filtering Configuration Chapter 18 Configuring Protocol Filtering 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: • IP (ip) • IPX (ipx) • AppleTalk and DECnet (group) • Packets not belonging to any of these protocols Default Protocol Filtering Configuration Table 18-1 shows the default protocol filtering configuration. Table 18-1 Protocol Filtering Default Configuration Feature Protocol filtering ip mode ipx mode group mode Default Value Disabled on auto auto Configuring Protocol Filtering These sections describe how to configure protocol filtering on Ethernet, Fast Ethernet, and Gigabit Ethernet ports: • Configuring Protocol Filtering, page 18-3 • Disabling Protocol Filtering, page 18-3 18-2 Software Configuration Guide-Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4 78-12647-02
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