Chapter 20 Management Monitoring and Optimization subtitle

Chapter 20: Management, Monitoring, and Optimization subtitle • Click to edit Master style

Chapter 20 Objectives • The Following Comp. TIA Network+ Exam Objectives Are Covered in This Chapter: • 2. 3 Given a scenario, use appropriate resources to support configuration management • Archives/backups • Baselines • On-boarding and off-boarding of mobile devices • NAC • Documentation o Network diagrams (logical/physical) o Asset management o IP address utilization o Vendor documentation o Internal operating procedures/policies/standards • • • 2

Chapter 20 Objectives (cont) • • • • 1. 10 Identify the basics elements of unified communication technologies • Vo. IP • Video • Real time services o Presence o Multicast vs unicast • Qo. S o DSCP o COS • Devices o UC servers o UC devices o UC gateways 3

Chapter 20 Objectives (cont) • • • • • 1. 11 Compare and contrast technologies that support cloud and virtualization • Virtualization o Virtual switches o Virtual routers o Virtual firewall o Virtual vs physical NICs o Software defined networking • Storage area network o i. SCSI o Jumbo frame o Fiber channel o Network attached storage • Cloud concepts o Public Iaa. S, Saa. S, Paa. S o Private Iaa. S, Saa. S, Paa. S o Hybrid Iaa. S, Saa. S, Paa. S 4 o Community Iaa. S, Saa. S, Paa. S

Chapter 20 Objectives (cont) • • • 1. 7 Differentiate between network infrastructure implementations • SCADA/ICS o ICS server o DCS/closed network o Remote terminal unit o Programmable logic controller • Medianets o VTC - ISDN - IP/SIP 5

Chapter 20 Objectives (cont) • • • 2. 4 Explain the importance of implementing network segmentation • SCADA systems/Industrial control systems • Legacy systems • Separate private/public networks • Honeypot/honeynet • Testing lab • Load balancing • Performance optimization • Security • Compliance 6

Chapter 20 Objectives (cont) • • • 5. 5 Given a scenario, implement the appropriate policies or procedures • Security policies o Consent to monitoring • Network policies • Acceptable use policy • Standard business documents o SLA o MOU o MLA o SOW 7

Chapter 20 Objectives (cont) • • • • • 5. 6 Summarize safety practices • Electrical safety o Grounding • ESD o Static • Installation safety o Lifting equipment o Rack installation o Placement o Tool safety • MSDS • Emergency procedures o Building layout o Fire escape plan o Safety/emergency exits o Fail open/fail close o Emergency alert system • Fire suppression systems 8

Chapter 20 Objectives (cont) • • • • 5. 8 Explain the basics of change management procedures • Document reason for a change • Change request o Configuration procedures o Rollback process o Potential impact o Notification • Approval process • Maintenance window o Authorized downtime • Notification of change • Documentation o Network configurations o Additions to network o Physical location changes 9

Chapter 20 Objectives (cont) • • • • • 5. 7 Given a scenario, install and configure equipment in the appropriate location using best practices • Intermediate distribution frame • Main distribution frame • Cable management o Patch panels • Power management o Power converters o Circuits o UPS o Inverters o Power redundancy • Device placement • Air flow • Cable trays • Rack systems o Server rail racks 10 o Two-post racks

Management, Monitoring, and Optimization • • • Ending up with a great network requires some really solid planning before you buy even one device for it. Planning includes thoroughly analyzing your design for potential flaws and optimizing configurations everywhere you can to maximize the network’s future throughput and performance. Planning will enable you to efficiently troubleshoot any issues arising after everything is in place, up, and running. 11

Using SNMP • Gathers data by polling the devices on the network from a management station at fixed or random intervals, requiring them to disclose certain information. • Consequently, SNMP can help simplify the process of gathering information of your entire internetwork • Can be used to either get information from the device about its state (SNMP Get. Request) or to make a change in the device’s configuration (Set. Request). 12

Managing Network Documentation • Create documentation keep it safe in at least three forms: – An electronic copy that you can easily modify after configuration changes – A hard copy in a binder of some sort, stored in an easily accessible location – A copy on an external drive to keep in a really safe place (even offsite) in case something happens to the other two or the building is destroyed 13

Schematics and Diagrams • Schematics and diagrams can be simple sketches created while brainstorming or troubleshooting on the fly; or they can be highly detailed, refined illustrations created with some of the flashy software packages available today. • Fall into these three groups: – – – – Wiring diagrams/schematics Physical network diagrams Logical network diagrams Schematics and Diagrams Asset Management IP address Utilization Vendor Documentation 14

Schematics and Diagrams • Wiring Schematics – Made up of cabled and other physical media: coax, fiber, and twisted pair. RJ 45 Connector • For example, in an RJ 45 connector, pin 1 is on the left and pin 8 is on the right, so clearly, within your UTP cable, make sure the right wires get to the right pins. 15

Schematics and Diagrams • Wiring Schematics – Cabling not created correctly will lead to disastrous results. Crossover Cable Ends 16

Schematics and Diagrams • • • All wires have to plug in somewhere It’s really good to know where that is. Whether it’s into a hub, a switch, a router, a workstation, or the wall, you positively need to know the who, what, where, when, and how of the way the wiring is attached. 17

Schematics and Diagrams • • Avoiding Confusion – Come up with systems for naming devices and numbering connections that’s intuitive Physical Network Diagrams – A physical network diagram contains all the physical devices and connectivity paths on your network and should accurately picture how your network physically fits together in detail. Router Internet Switch 2 Switch 1 Server 1 (Login) Server 3 (Mail) 19 2 Printers 18

Schematics and Diagrams • A more detailed physical network diagram is necessary in many cases. Interne t Clients 19

Schematics and Diagrams • Detailed physical network diagrams are necessary even down to rack space. 8 U Rack Mount Monitor Cisco 2960 XL Switch PC-1 PC-2 PC-3 PC-4 Rack Diagram PC-5 Router 55. 800. 50. 1 VLAN 1 Netware 5. 1 55. 811. 50. 20 PC-6 Cisco 2900 XL Switch VLAN 1 Red. Hat 7. 1 55. 812. 50. 20 UPS PC-7 PC-8 PC-9 UPS 20

Schematics and Diagrams • Schematics and Diagrams – A logical network diagram includes protocols, configurations, addressing schemes, access lists, firewalls, types of applications, etc. that apply logically to your network. Firewall External Router Internet R&D subnet 192. 168. 5. 0/24 File Server IP: 192. 168. 5. 10/24 Printer IPs: 192. 168. 5. 20/24192. 168. 5. 39 Workstation IPs: 192. 168. 5. 50/24192. 168. 5. 99 Web Server www. example. com 192. 168. 3. 10/24 Mail Server mail. example. com 192. 168. 3. 15/24 Server subnet 192. 168. 4. 0/24 Server IPs: 192. 168. 4. 10/24 192. 168. 4. 11/24 192. 168. 4. 12/24 192. 168. 4. 13/24 Admin subnet 192. 168. 6. 0/24 File Server IP: 192. 168. 6. 10/24 Printer IPs: 192. 168. 6. 20/24192. 168. 6. 39 Workstation IPs: 192. 168. 6. 50/24192. 168. 6. 99 21

Baselines • A baseline refers to the standard level of performance of a certain device or to the normal operating capacity for your network. – A specific server’s baseline describes norms for factors like how busy its processors are – How much of the memory it uses – How much data usually goes through the NIC at a given time • Baselines include information about four key components: – – Processor Memory Hard-disk (or other storage) subsystem Network adapter or subsystem 22

Policies, Procedures, and Regulations • Policies govern how the network is configured and operated and how people are expected to behave on it. – Clean-desk policies – Network access (who, what, and how) – Acceptable-use policy – Disposal of network equipment – Use of recording equipment – How passwords are managed (length and complexity required, and how often they need to be changed) – Types of security hardware in place – How often to do backups and other fault-tolerant measures – What to do with user accounts after an employee leaves the company 23

Policies, Procedures, and Regulations • Procedures are the actions to be taken in specific situations. – Disciplinary action to be taken if a policy is broken – What to do during an audit – How issues are reported to management – What to do when someone is locked out of their account – How to properly install or remove software on servers – What to do if files suddenly appear to be “missing” – How to respond when a network computer has a virus – Actions to take if a hacker has broken into the network – Actions to take if there is a physical emergency 24

Policies, Procedures, and Regulations • Regulations are rules imposed on your organization by an outside agency, like a certifying board or a government entity • IT regulations center around something known as the CIA triad – Confidentiality – Integrity – Availability • Know the regulations your company is expected to comply with, and make sure your IT policies and procedures are completely in line with any regulations. 25

Figure 20. 8

Figure 20. 9

Reasons to Optimize Your Network’s Performance • Latency Sensitivity – Vo. IP • Voice over Internet Protocol (Vo. IP) describes several technologies delivering voice communications over the Internet or other data networks – Video applications • High-Bandwidth Applications – Vo. IP – Video applications • Uptime – Uptime is the amount of time the system is up and accessible to your end users 28

Optimize Performance • Quality of Service (Qo. S) – Quality of Service (Qo. S) refers to the way the resources are controlled – Qo. S provides different priority of one or more types of traffic over other levels, to different applications, data flows, or users • Qo. S methods focus problems that can affect data as it traverses network cable. – Delay – Dropped packets – Error – Jitter – Out-of-order delivery 29

Optimize Performance • Traffic Shaping – Traffic shaping, or packet shaping, is another form of bandwidth optimization which works by delaying packets meeting a certain criteria to guarantee usable bandwidth for other applications. • Load Balancing – Load balancing refers to a technique used to spread work out to multiple computers, network links, or other devices. • High Availability – High availability is a system-design protocol guaranteeing an amount of operational uptime for a given period of time. 30

Optimize Performance • Caching Engines – A cache is a collection of data that duplicates key pieces of original data. – A caching engine is basically a database on a server that stores information people need to access fast. • Fault Tolerance – Fault tolerance means that even if one component fails, you won’t lose access to the resource it provides. Common Address Redundancy Protocol – provides IP-based redundancy, allowing a group of hosts on the same network segment (referred to as a redundancy group) to share an IP address. • 31