Displaying MSTP Information for CIST Instance 0
Instance 0 is the Common and Internal Spanning Tree Instance (CIST). When you display information for this instance there are some differences with displaying other instances. The following example displays MSTP information for CIST Instance 0.
device# show mstp 0 MSTP Instance 0 (CIST) - VLANs: 1 ---------------------------------------------------------------------------- Bridge Bridge Bridge Bridge Bridge Root Root Root Root Identifier MaxAge Hello FwdDly Hop MaxAge Hello FwdDly Hop hex sec sec sec cnt sec sec sec cnt 8000000cdb80af01 20 2 15 20 20 2 15 19 Root ExtPath RegionalRoot IntPath Designated Root Bridge Cost Bridge Cost Bridge Port hex hex hex 8000000480bb9876 2000 8000000cdb80af01 0 8000000480bb9876 3/1/1 Port Pri PortPath P2P Edge Role State Designa- Designated Num Cost Mac Port ted cost bridge 3/1/1 128 2000 T F ROOT FORWARDING 0 8000000480bb9876
To display details about the MSTP configuration, enter the following command.
device# show mstp conf MSTP CONFIGURATION ------------------ Name : Reg1 Revision : 1 Version : 3 (MSTP mode) Status : Started Instance VLANs -------- ------------------------------------------------------ 0 4093
To display details about the MSTP that is configured on the device, enter the following command.
device# show mstp detail MSTP Instance 0 (CIST) - VLANs: 4093 ---------------------------------------------------------------------------- Bridge: 800000b000c00000 [Priority 32768, SysId 0, Mac 00b000c00000] FwdDelay 15, HelloTime 2, MaxHops 20, TxHoldCount 6 Port 1/1/4 - Role: DESIGNATED - State: FORWARDING PathCost 20000, Priority 128, OperEdge T, OperPt2PtMac F, Boundary T Designated - Root 800000b000c00000, RegionalRoot 800000b000c00000, Bridge 800000b000c00000, ExtCost 0, IntCost 0 ActiveTimers - helloWhen 1 MachineState - PRX-DISCARD, PTX-IDLE, PPM-SENDING_RSTP, PIM-CURRENT PRT-ACTIVE_PORT, PST-FORWARDING, TCM-INACTIVE BPDUs - Rcvd MST 0, RST 0, Config 0, TCN 0 Sent MST 6, RST 0, Config 0, TCN 0