區域網路節點定位機制 A Node Location Discovery Scheme for LAN Management

Outline Introduction Prerequisite Information Scheme

Introduction Dynamic IP address distribution High cost for troubleshooting Locate host

Prerequisite SNMP MIB Ⅱ Bridge MIB

Information Learnning Table ARP Table Spanning Tree Protocol (root port 、 designated bridge)

Information Object NameValueindex sysNameDevice Name ╳ ipNetToMediaPhysAddressPhysical AddressIP Address dot1dTpFdbPortPortPhysical Address dot1dBaseBridgeAddressDevice Physical Address ╳ dot1dStpRootPortRoot Port ╳ dot1dStpPortDesignatedBridgeDesignated Bridge Physical Address Port

Scheme IP Address → Physical Address → Port Set Device Level and Root Port Root port equals 0 → Root(Level 0) Designated bridge is root → Level 1 Designated bridge is level 1-device → Level 2 …

Scheme H-SWA-1 H-SWB-7 H-SWC-4 H-SWD-9 H-SWE-10

Scheme SWA-0-0 SWB-3-1 SWC-4-1 SWD-9-2 SWE-10-2

Scheme H-SWA-1 → SWA-0-0 H-SWB-7 → SWB-3-1 H-SWC-4 → SWC-4-1 H-SWD-9 → SWD-9-2 H-SWE-10 → SWE-10-2

Scheme H-SWA-1→ SWA-0-0 H-SWB-7 → SWB-3-1 ∵ level B ＞ level A ∴ Select { H-SWB-4 }