網路管理軟體輔助校園 網路管理方式之介紹

1. 網路管理軟體輔助校園 網路管理方式之介紹 廖偉勝 資深技術顧問 HP Taiwan Ltd. SGBU

2. 什麼是網路管理 ?

3. 網路管理的目的 • 提昇網路運作的能見度 • 網路狀態及事件 • 網路組態 • 改變IT人員的作業模式 • 從救火員->主動預警 • 快速解決問題 • 協助規劃網路擴充 • 趨勢分析 • 報表產出

4. 網路管理的功能 • 減少網路設備及系統的當機時間 • 在不中斷網路運作的前提下,可以快速偵測及整理出網路問題或是頻頸所在 • 具備偵測網路資料以預測問題 • 具備紀錄歷史資料以分析問題 • 具備發生某些事件可以執行預設程式讓管理者即時知道,掌握問題狀況.

5. Read: snmpget Write: snmpset 網路管理的架構 SNMP Based Management Unsolicited Message: snmptrap Managed Nodes w/SNMP Agent

6. 被管理端物件 A A A A A A Server / Database / Application Network Environment SNMP OpenView 管理架構 Browser View 管理系統工具 HP OVO Server Data Polling & Ping Event Message ConsoleView Polling & Ping HP NNM Server

7. NW Probes NW Element Mgr Giga Router SDH Sonet DWDM Switch OpenView網路管理架構 Performance Insight ServiceDesk Performance OV TeMIP NNM OVO OV Operations OV NNM OSI AM ASCII AM CORBA AM SNMP AM

8. 網路管理階層架構 Portal • Network Solutions for IP Data Networks: • IP Telephony • IP VPN – MPLS-based • WLAN • Frame Relay • ATM • IP Multicast Service Management Resource optimization Network Performance Management Problem Resolution Operational Monitoring Integrated Fault & Performance Trouble-shooting Root Cause Network Fault Management Event handling & analysis Discovery & Monitoring

9. servicecentric IT 服務階層圖 網站服務 IIS MS SQL Portal AP DB Performance Disk Usage 迅速找出問題根源 ! IIS Server is not response. Tablespace of database xyz is almost full. ……………. assessadviseact

10. 服務導向管理 customer services • Flexible service modeling • Immediate visibility into service-impacting alarms wireless & telecom apps and systems IP equipment

11. management repository OpenView 維運應用實例 SAP Oracle Building 1 HP-UX Sun Solaris IBM AIX Windows XP Apache, webLogic Building 2 Sun Solaris Windows 2000 SQL Server Exchange Server OpenView Operations + SPIs + NNM + PI + OVIS + OVTA 應用管理人員 網管人員 資料庫 管理員 系統人員

12. 網路管理的必要性

13. 趨勢 • Network technology trends • IP routing evolution • Built-in redundancy/resiliency • Merging voice, data, video over IP • Network management trends • Moving beyond managing devices to understand connections and complex relationships between network components and the services they support • Point products are giving way to integrated suite of functionality

14. 網管的挑戰 • Complexity • Complex, unpredictable traffic patterns • Volumes of management data • Emerging network technologies, e.g., redundant routing protocols, IP Telephony • Cohesiveness • Need an integrated view of the entire network and its relationships and interactions • Cost pressures • Faster deployment • Fewer resources and special skills “Just doing more with less is not enough – demands and dependency on the network for the entire business operation are growing – the key is to optimize what we do with what we have...”

15. 網管軟體應該能做到….

16. 造成down-time的因素 Other 7% Environmental Factors 8% Software System Failure 27% hp OpenView helps addresses 80% the major causes of downtime Network Transmission Failure 17% Hardware System Failure 23% Human Error 18% Source: Dataquest, Mission-Critical Services: Do Users Need More Than Vendors Can Deliver? 12/99

17. 在問題更嚴重之前就進行管理 • reducing mean time to… • identify the problem(focus use on important symptoms) • + • diagnose the problem(is it a real problem?) • + • prioritize the problem (severity, who’s affected) • + • fix & verify the problem/remedy(normalcy check) • = maximum benefit major customer challenge: shortening the problem lifecycleMTTR (Mean Time To Repair)

18. MRTG ??

19. e NNM Database 網管主機 實例一,學生宿舍Switch當機 大哥大簡訊 E-Mail

20. e NNM Database 網管主機 實例二,資訊中心骨幹CPU過高 大哥大簡訊 E-Mail

21. NNM Database 網管主機 實例三,宿舍A電腦中毒,發出大量封包 Disable port 48 Virus

22. 如何讓你的網路最佳化

23. 網路優化步驟 • 由即時性網管轉變成前置性網管 • 找出目前網路上有那些設備?如何連接?如何設定?並可以清楚了解網路上發生的問題. • 透過歷史資料產生趨勢分析來決定如何更改設定來調整網路,或是更換負荷過重的設備. • 透過設備臨界值偵測,可以學習到如何處理問題發生的應變機制,進而防止問題發生,在問題發生前就先解決.

24. HP OpenView網路管理方案

25. OpenView Network Node Manager • 使用網管協定標準SNMP and MIB 來管理全部的網路設備。 • 自動依照網路架構排列儲存所發現的網路節點。 • 自動持續監控網路元件之狀況與聯結狀態，並以不同顏色顯示其現況。 • 可依據企業環境客制化網路拓樸圖。 • 網路管理的業界標準

26. LAN LAN LAN WAN What? When? Why? 超強事件關聯機制，問題發生的主因無所遁形。

27. e NNM Database 彈性的告警機制 呼叫器 大哥大簡訊 E-Mail Pop-Up Windows 網管主機 LED 看板 結合通訊告警機制，以手機簡訊或電子郵件火速通知管理人員。

28. 彈性的查閱視窗 • node view • neighbor view • Station view • MPLS view • OSPF view • network view • segment view • path view • HSRP view • IPv6 view

29. Insight managerand hp OpenView network node manager • 整合模組可免費下載 • NNM 支援 HP-UX, Solaris and windows 2000,XP • 可協助管理人員輕鬆分辨不同之 ProLiant 伺服器 • 可從網路拓樸圖中掌握 ProLiant 伺服器之運作狀態 • 可透過SNMP事件得之各伺服器所發生之硬體異常 • 透過瀏覽器查詢詳細狀態

30. What’s new? AdvancedEdition • IP Telephony solution • Partnering with Cisco to provide out-of-the-box IP Telephony Statistics reports • Certifying OpenView agents on the AVVID platform to enable deployment partners to develop OpenView SPIs to monitor Cisco Call Manager and Unity applications • Partnering with Avaya to provide Avaya IP Telephony customers an integrated and tested IP Telephony fault management solution Advanced

31. NNM Smart Plug-ins AdvancedEdition • The Network Management Smart Plug-ins include discovery, monitoring, root-cause analysis, performance optimization and forecasting. • NNM SPI for LAN/WAN Edge • Reactive: quick problem locator for faster identification and resolution • Proactive: monitoring to alert when problem is brewing before it has negative impact • Reduces hundreds of events to one • NNM SPI for MPLS VPN • Provides real time fault views • Conducts sophisticated impact analysis (relationships between PE, VRF and VPNs) • Shows affected customer sites and service availability • NNM SPI for Advanced Routing • Protocol support for IPv6, OSPF, Cisco HSRP • NNM SPI for MultiCast • Efficient transmission of data to many destinations at one time • Integration with Wireless LAN management software vendors

32. Path analysis AdvancedEdition Integrated fault & performance ProblemDiagnosis PerformanceInsight for Networks probe • Views shows layer 2 for more complete path analysis • OVPI: • Improved Ease-of-Use • Base-lining • IP QoS • Cisco CAR • IPF Benefits: Isolating performance problems in complex networks. probe

33. Problem Diagnosis

34. Selecting Endpoints Enter endpoints Click GO! Review path. Double-click for details.

35. Path List When probe lastfound path in use Assignedidentifier Number of devicesbetween probe andtarget % of probe attempts that find this path Cumulative statusof all devices on path Most likelycurrent path At least onenot responding All responding Can’t be pingeddue to lack of identity

36. Path Map

37. Path Detail Simple deviceidentifier DNS name Interface thatreceived ping* Status whenclick GO How fastping returns * On probe, interface that sent pings

38. Current Path Detail Special information

39. Popup Menu Includes Telnet

40. Toggle Port Labels

41. 內建報表分析 “HP OpenView's NNM report generation is so easy it took just a few minutes to generate daily reports … was simple to set up and thoughtfully designed for use over bandwidth-challenged dial-up remote connections. NNM also gave us useful statistics on our network's protocols.” • 可定期自動產生網路狀態的報表 • 透過網頁介面設定報表內容及瀏覽報表 • 可自動將報表寄送到指定帳號 • 內建報表包括: • 效能即可用度分析 • 資產管理 • 事件管理 • 安全管理 • 網路介面管理 • 經常重置設備清單 • 重複事件清單

42. ECS and Correlation Composer Correlators Cuircuits

43. Internet View OSPF View Station View Node View Segment View Network View Neighbor View VLAN View Path View Dynamic Views for Network Topologies und Network Services HP OpenView Systemmanagement

44. VLAN View • Cisco • RFC 1493 • RFC 1213 for node and • interface details • Cisco CDP MIB • Cisco Stack MIB • other • Enterasys/Cabletron • Extreme • HP

45. VLAN View

46. Highlight VLAN Menu New in ET 2.0

47. Graphical representation of an OSPF Area Default: Area 0 (0.0.0.0) Table of routers, filtered by area, with Router ID, IP addresses, and neighbors Figure illustrates a pop-up of node details (status, uptime, description, etc.) Rest mouse pointer on the device Extended Topology OSPF View

48. OSPF View

49. IPv6 View • Discovery and monitoring of IPv6 Devices by ICMPv6 ping • Dynamic IPv6 Topology View shows Layer 3 Connectivity • 1 Management Station monitors IPv4 and IPv6 Netzworks • Dual-stack (IPv4 & IPv6) Router supported: Hitachi, NEC, Juniper, & Cisco HP OpenView Systemmanagement

50. All HSRP Group ViewLaunch via tools menu, alarm browser or url • Monitors groups, interfaces andgroup states(Active/Standby) • Do not manageVirtual IP addr • Must manage real interface IP Virtual IP Address HSRP Group Status Router names withineach HSRP Group