Cisco NM-8B-U User Guide - Page 19
Forwarding State, Interface 2 in Forwarding State
UPC - 074632001001
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16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Feature Overview Forwarding State A Layer 2 interface in the forwarding state forwards frames, as shown in Figure 8. The Layer 2 interface enters the forwarding state from the learning state. Figure 8 Interface 2 in Forwarding State All segment frames Forwarding Station addresses Port 1 BPDUs Network management and data frames Filtering database System module Frame forwarding S5695 Station addresses BPDUs Port 2 Network management and data frames Forwarding All segment frames A Layer 2 interface in the forwarding state performs as follows: • Forwards frames received from the attached segment. • Forwards frames switched from another Layer 2 interface for forwarding. • Incorporates end station location information into its address database. • Receives BPDUs and directs them to the system module. • Processes BPDUs received from the system module. • Receives and responds to network management messages. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 19