Cisco 7604 Configuration Guide - Page 376
Disabling MAC Address Learning, Viewing the MAC Address Table
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Customizing the MAC Address Table Chapter 19 Configuring ARP Inspection and Bridging Parameters The timeout_value (in minutes) is between 5 and 720 (12 hours). 5 minutes is the default. Disabling MAC Address Learning By default, each interface automatically learns the MAC addresses of entering traffic, and the FWSM adds corresponding entries to the MAC address table. You can disable MAC address learning if desired, however, unless you statically add MAC addresses to the table, no traffic can pass through the FWSM. To disable MAC address learning, enter the following command: hostname(config)# mac-learn interface_name disable The no form of this command reenables MAC address learning. The clear configure mac-learn command reenables MAC address learning on all interfaces. Viewing the MAC Address Table You can view the entire MAC address table (including static and dynamic entries), the MAC address table for an interface, or the MAC address table for a bridge group. To view the MAC address table, enter the following command: hostname# show mac-address-table [interface_name | bridge_group] The following is sample output from the show mac-address-table command that shows the entire table: hostname# show mac-address-table interface mac address type Age min) Group outside 0009.7cbe.2100 static - Eng inside 0010.7cbe.6101 static - Eng inside 0009.7cbe.5101 dynamic 10 Eng The following is sample output from the show mac-address-table command that shows the table for the inside interface: hostname# show mac-address-table inside interface mac address type Age min) Group inside 0010.7cbe.6101 static - Eng inside 0009.7cbe.5101 dynamic 10 Eng 19-4 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM OL-20748-01
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