94To do... Use the command... RemarksDisplay BPDU statistics on portsdisplay stp bpdu-statistics [ interfaceinterface-type interface-number [ instanceinstance-id ] ] [ | { begin | exclude |include } regular-expression ]Available in any viewDisplay information about ports blockedby STP protection functionsdisplay stp down-port [ | { begin |exclude | include } regular-expression ] Available in any viewDisplay the historical information of portrole calculation for the specified MSTI orall MSTIsdisplay stp [ instance instance-id ] history[ slot slot-number ] [ | { begin | exclude |include } regular-expression ]Available in any viewDisplay the statistics of TC/TCN BPDUssent and received by all ports in thespecified MSTI or all MSTIsdisplay stp [ instance instance-id ] tc [ slotslot-number ] [ | { begin | exclude |include } regular-expression ]Available in any viewDisplay the status and statistics of MSTPdisplay stp [ instance instance-id ][ interface interface-list | slot slot-number ][ brief ] [ | { begin | exclude | include }regular-expression ]Available in any viewDisplay the MST region configurationinformation that has taken effectdisplay stp region-configuration [ |{ begin | exclude | include }regular-expression ]Available in any viewDisplay the root bridge information of allMSTIsdisplay stp root [ | { begin | exclude |include } regular-expression ] Available in any viewClear the statistics of MSTP reset stp [ interface interface-list ] Available in userviewMSTP configuration exampleNetwork requirementsAs shown in Figure 25:• All devices on the network are in the same MST region. Device A and Device B work on thedistribution layer. Device C and Device D work on the access layer.• Configure MSTP so that packets of different VLANs are forwarded along different spanning trees:Packets of VLAN 10 are forwarded along MSTI 1, those of VLAN 30 are forwarded along MSTI 3,those of VLAN 40 are forwarded along MSTI 4, and those of VLAN 20 are forwarded along MSTI0.• VLAN 10 and VLAN 30 are terminated on the distribution layer devices, and VLAN 40 isterminated on the access layer devices, so the root bridges of MSTI 1 and MSTI 3 are Device A andDevice B respectively, and the root bridge of MSTI 4 is Device C.
