Cisco NME-16ES-1G User Guide - Page 121

16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Configuration Tasks Configuring Fallback Bridging This section describes how to configure fallback bridging on your switch. It contains this configuration information: • Understanding the Default Fallback Bridging Configuration, page 121 • Creating a Bridge Group, page 121 • Preventing the Forwarding of Dynamically Learned Stations, page 122 • Configuring the Bridge Table Aging Time, page 123 • Filtering Frames by a Specific MAC Address, page 124 • Adjusting Spanning-Tree Parameters, page 124 • Monitoring and Maintaining the Network, page 129 Understanding the Default Fallback Bridging Configuration Table 16 shows the default fallback bridging configuration. Table 16 Default Fallback Bridging Configuration Feature Bridge groups Switch forwards frames for stations that it has dynamically learned Bridge table aging time for dynamic entries MAC-layer frame filtering Spanning tree parameters: • Switch priority • Interface priority • Interface path cost • Hello BPDU interval • Forward-delay interval • Maximum idle interval Default Setting None are defined or assigned to an interface. No VLAN-bridge STP is defined. Enabled. 300 seconds. Disabled. • 32768. • 128. • 10 Mbps: 100. 100 Mbps: 19. 1000 Mbps: 4. • 2 seconds. • 20 seconds. • 30 seconds. Creating a Bridge Group To configure fallback bridging for a set of SVIs or routed ports, these interfaces must be assigned to bridge groups. All interfaces in the same group belong to the same bridge domain. Each SVI or routed port can be assigned to only one bridge group. A maximum of 31 bridge groups can be configured on the switch. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 121