Operation Manual – MSTPH3C S7500 Series Ethernet Switches Chapter 1 MSTP Configuration1-34To do ... Use the command ... RemarksEnter system view system-view —Enter Ethernet portviewinterface interface-typeinterface-number —Enable the loopguard function onthe current portstp loop-protectionRequiredThe loop guard function isdisabled by default.II. Configuration example# Enable loop guard function on Ethernet2/0/1. system-view[H3C] interface ethernet2/0/1[H3C-Ethernet2/0/1] stp loop-protection1.5.6 TC-BPDU Attack Guard ConfigurationI. Configuration procedureFollow these steps to enable the TC-BPDU attack guard function:To do ... Use the command ... RemarksEnter system view system-view —Enable theTC-BPDU attackguard functionstp tc-protection enableRequiredThe TC-BPDU attack guardfunction is disabled by default.II. Configuration example# Enable the TC-BPDU attack guard function. system-view[H3C] stp tc-protection enable1.6 Digest Snooping Configuration1.6.1 IntroductionAccording to IEEE 802.1s, two interconnected MSTP switches can interwork with eachother through MSTIs in an MST region only when the two switches have the same MSTregion-related configuration. Interconnected MSTP switches determine whether or notthey are in the same MST region by checking the configuration IDs of the BPDUs