Cisco WS-C4507R-E Software Guide - Page 332
Default Protocol Filtering Configuration, Configuring Protocol Filtering on the Switch, Configuring
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Default Protocol Filtering Configuration Chapter 19 Configuring Protocol Filtering For example, if a host that supports both IP and Internetwork Packet Exchange (IPX) is connected to a switch port that is 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 as on for the IP protocol group. Typically, you should configure a port to auto for IP only if there is a directly connected end station that is 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 19-1 shows the default protocol filtering configuration. Table 19-1 Protocol Filtering Default Configuration Feature Protocol filtering ip mode ipx mode group mode Default Value Disabled on auto auto Configuring Protocol Filtering on the Switch The next two sections describe how to configure and disable protocol filtering on Ethernet, Fast Ethernet, and Gigabit Ethernet ports. Configuring Protocol Filtering To configure protocol filtering on Ethernet, Fast Ethernet, and Gigabit Ethernet ports, perform this task in privileged mode: Step 1 Step 2 Step 3 Task Command Enable protocol filtering. set protocolfilter enable Set the protocol membership of the desired ports. set port protocol mod_num/port_num {ip | ipx | group} {on | off | auto} Verify the port filtering configuration. show port protocol [mod_num[/port_num]] 19-2 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01
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