D-Link DGS-6600-48TS Configuration Guide - Page 136
Specifying the Link Type, Limiting the BPDU Transmission Rate, spanning-tree transmit-hold-count
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Volume 3-Layer 2 Configurations / Chapter 14-Spanning Tree Protocol (STP) Configuration STP Configuration Commands In the following example, the user enable fast forwarding on Ethernet interface 4.1: DGS-6600:2>enable DGS-6600:15#configure terminal DGS-6600:15(config)#interface eth4.1 DGS-6600:15(config-if)#spanning-tree fast-forwarding DGS-6600:15(config-if)#end Specifying the Link Type In order to rapidly converge, a bridge needs to handshake with the neighbor bridge. The handshake mechanism assumes that on a specific link, the bridge has only one neighbor bridge. This means that a handshake will only be carried out on a point-to-point link. Handshaking will not be performed on a shared media link where multiple neighbor bridges are possible,. The user can specify whether to auto-detect the link type or manually specify the link type. Based on auto-detection, a full-duplex port is considered to have a point-to-point connection; on the contrary, a half-duplex port is considered to have a shared media connection. Use the following command to specify the link type: Command spanning-tree link-type {point-to-point | shared} Explanation Specifies the link type. In the following example, the user configures the link type as "Point-to-Point" on Ethernet interface 4.33: DGS-6600:2>enable DGS-6600:15#configure terminal DGS-6600:15(config)#interface eth4.33 DGS-6600:15(config-if)#spanning-tree link-type point-to-point DGS-6600:15(config-if)#end Limiting the BPDU Transmission Rate Too frequent BPDU transmissions will downgrade the performance of the partner switch. The spanning-tree transmit-hold-count command allows the user to limit the number of BPDU's transmitted by all ports within the hello time period. Use the following command to limit the BPDU transmission rate: Command spanning-tree transmit-hold-count VALUE Explanation Limits the number of BPDU's transmitted by all ports within the hello time period. DGS-6600 Configuration Guide 136