Operation Manual – MSTPH3C S3100 Series Ethernet Switches Chapter 1 MSTP Configuration1-48III. Configuration example# Enable the TC-BPDU attack guard function system-view[Sysname] stp tc-protection enable# Set the maximum times for the switch to remove the MAC address table within 10seconds to 5. system-view[Sysname] stp tc-protection threshold 51.6.7 Configuring BPDU DroppingTable 1-41 Configure BPDU droppingOperation Command DescriptionEnter system view system-view —Enter Ethernet port view interface interface-name —Enable BPDU dropping bpdu-drop anyRequiredBPDU dropping isdisabled by default.# Enable BPDU dropping on Ethernet 1/0/1.system-view[Sysname] interface Ethernet1/0/1[Sysname-Ethernet1/0/1] bpdu-drop any1.7 Configuring Digest Snooping1.7.1 IntroductionAccording to IEEE802.1s, two interconnected switches can communicate with eachother through MSTIs in an MST region only when the two switches have the same MSTregion-related configuration. Interconnected MSTP-enabled switches determinewhether or not they are in the same MST region by checking the configuration IDs ofthe BPDUs between them. (A configuration ID contains information such as region IDand configuration digest.)As some other manufacturers' switches adopt proprietary spanning tree protocols, theycannot communicate with the other switches in an MST region even if they areconfigured with the same MST region-related settings as the other switches in the MSTregion.This problem can be overcome by implementing the digest snooping feature. If a porton an S3100 Ethernet switch is connected to another manufacturer's switch that has
