CCDA 640-864 Summary Notes – Chapter 6 – Day 14

Exam Topic 3: WAN Design Methodology Use PPDIOO Methodology. Key concepts: Analyze the network requirements Application type Traffic volume Traffic patterns Characterize existing network Design topology chould be flexible and have room for growth Implement High Availability. Consider: Response time Throughput Reliability Application requirements Data File transfer Reasonable response time (time between the cient user request … Continue reading CCDA 640-864 Summary Notes – Chapter 6 – Day 14

CCDA 640-864 Summary Notes – Chapter 6 – Day 13

Exam Topic 1: Wide-area networks (WAN) Overview WAN - communication networks that are used to connect network locations that are geographically separated. Tarrif - a fee charged by a service provider for providing WAN services to customers. Service - WAN communications provided by service providers or telecommunication carriers Choice of WAN Technology depends on : … Continue reading CCDA 640-864 Summary Notes – Chapter 6 – Day 13

CCDA 640-864 Summary Notes – Chapter 5 – Day 12

Exam Topic 3: Wireless LAN Design Controller Redundancy Design: Deterministic Dynamic Deterministic Controller Redundancy Ap is configured with Primary Controller Secondary controller Tertiary controller DisAdvantages More planning required More configuration Advantages Better predictability Faster failover times Network stability Flexible and powerful redundancy design options Fallback incase of failover Recommended best practice Examples: N+1 N+N N+N+1 N+1 … Continue reading CCDA 640-864 Summary Notes – Chapter 5 – Day 12

CCDA 640-864 Summary Notes – Chapter 5 – Day 11

Exam Topic 2 - Part 2: Cisco Unified Wireless Network (UWN) Architecture LWAPP Discovery of WLC LWAPP Image procedure: CAPWAP Image procedure: CAPWAP AP sends a CAPWAP discovery request WLC responds withCAPWAP response within 60 seconds WLC selection is configurable onWLC. AP selects according to the following order Primary sysName (preconfigured) Second sysName (preconfigured) Tertiary sysName … Continue reading CCDA 640-864 Summary Notes – Chapter 5 – Day 11

Citrix Netscaler 10 Summary Notes – Getting Started – Day 6

Load Balancing Overview Distributes client requests across multiple servers to optimize resource utilization Prevents bottlenecks Configuration: Define a virtual server that proxies multiple servers in a server farm Balance the load Provides traffic management from Layer 4 (TCP and UDP) through Layer 7 (FTP, HTTP, and HTTPS) Load balancing algorithms are used to determine how to … Continue reading Citrix Netscaler 10 Summary Notes – Getting Started – Day 6

CCDA 640-864 Summary Notes – Chapter 5 – Day 10

Exam Topic 2 - Part 1: Cisco Unified Wireless Network (UWN) Architecture Benefits: Deliivers scalable, manageable and secure WLANs Combines wired and wireless network Reduced Total Cost of Ownership (TCO) Enhanced visibility and control Dynamic RF management WLAN Security Mobility Enhanced productivity and collaboration Network Elements: Client devices access points - access to the network network … Continue reading CCDA 640-864 Summary Notes – Chapter 5 – Day 10

Citrix Netscaler 10 Summary Notes – Getting Started – Day 5

System Configuration slot/port VLANS Supports IEEE802.1Q VLANS Supported: Default VLAN = 1 PortBased VLAN Tagged VLAN (nsvlan) Link Aggregate Channels Channel parameters have precedence over the interface parameters Clock Clock synchronization is done in shell DNS Can Function as: Authoritative Domain Name Server (ADNS) DNS proxy server End Resolver Forwarder (typical config) Can add resource records such … Continue reading Citrix Netscaler 10 Summary Notes – Getting Started – Day 5

CCDA 640-864 Summary Notes – Chapter 5 – Day 9

Cisco Unified Wireless Network (UWN) architecture - combines wireless and wired network. Exam Topic 1: Wireless LAN Technologies WLAN Standards IEEE 802.11 (Legacy) (1997) Speeds of 1 (typical) and 2 (max)  Mbps Used direct sequence spread spectrum (DSSS) and frequency-hopping spread spectrum (FHSS) in L1  DSSS divides data into separate sections; each section travels over different frequencies at the … Continue reading CCDA 640-864 Summary Notes – Chapter 5 – Day 9

Citrix Netscaler 10 Summary Notes – Getting Started – Day 4

Citrix NetScaler Editions Feature licence required on all editions Standard Edition SME comprehensive L4-L7 traffic management Web application availability Enterprise Edition Advanced  L4-L7 traffic management Web Application acceleration Increases Web application performance, availability and reduced costs Platinum Edition Reduces data center costs Accelerates application performance End to end visibility of application performance Advanced application security Administration options: … Continue reading Citrix Netscaler 10 Summary Notes – Getting Started – Day 4

CCDA 640-864 Summary Notes – Chapter 4 – Day 8

Exam Topic 4: Virtualization Overview Virtualization technologies abstract logical elements from hardware (applications or operating systems) or networks (LANs and SANs) and run them in a virtual state Allow a physical device to share its resources by acting as multiple versions of itself Allow multiple physical devices to logically appear as one Benefits of virtualization improves network efficiency provides enhanced flexibility … Continue reading CCDA 640-864 Summary Notes – Chapter 4 – Day 8

Citrix Netscaler 10 Summary Notes – Getting Started – Day 3

Understanding the NetScaler An Application L4-L7 Switch. Used for Web Applications. Functions as a TCP Proxy Features: Switching Features for optimal distribution of client requests Security and protection Features protects web applications from application-layer attacks Server-farm Optimization Features speeds up applications by offloading resource-intensive operations from the server Placement Request Switching Netscaler is deployed infront of a … Continue reading Citrix Netscaler 10 Summary Notes – Getting Started – Day 3

CCDA 640-864 Summary Notes – Chapter 4 – Day 7

Data Center Design Exam Topic 1: Enterprise DC Architectures Data Center 1.0 Centralized Used mainframes to process and store data Users used terminals to access and work on mainframes benefits: availability, resiliency, and service level agreements (SLA) Data Center 2.0 client/server and distributed computing into the mainstream data center Bussiness applications installed on servers users accessed data … Continue reading CCDA 640-864 Summary Notes – Chapter 4 – Day 7

CCDA 640-864 Summary Notes – Chapter 3 – Day 6

Server Connectivity Options Single NIC (FE GE Full duplex + No redundancy) Dual NIC Etherchannel - redundancy Dual NIC to separate access - redundancy Content switching - redundancy + load balancing per user request Enterprise Data Center Port density for servers Low latency layer 2 Suport both single and dual connected servers Aggregation (Distribution) Layer … Continue reading CCDA 640-864 Summary Notes – Chapter 3 – Day 6

CCDA 640-864 Summary Notes – Day 5

LAN Hardware Repeaters Layer 1 device Connects separate segments Do not control broadcasts or collision domains Forward frames out all other interfaces Protocol transparent understands bits Amplify the signals 5-4-3 Rule: The maximum path between two stations on the network should not be more than five segments, with four repeaters between those segments, and no more than … Continue reading CCDA 640-864 Summary Notes – Day 5

CCDA 640-864 Summary Notes – Day 4

IEEE 802.3-2002 (Ethernet Standards) Design Rules Round trip propagation delay should be less than 512-bit times in one collision domain. Max for 10 Mbps - 51.2 microseconds. Max for 100 Mbps - 5.12 microseconds 10 Base 5 No longer used Max segment = 500 m Max collision domain = 2500m of 5 segments Has a maximum diameter … Continue reading CCDA 640-864 Summary Notes – Day 4

Aruba620 -SSID Prunning on a specific AP

Situation: I have the Aruba620 controller configured with several SSIDs. I would like a specific AP RAP-2WG to announce 3/4 SSIDs. The unlucky SSID that we will prune is Test2-620 🙂 We need to locate that specific AP by MAC address: Configuration > AP Specific > Edit "00:0b:86:xx:xx:xx" Commands: ap-name "00:0b:86:c3:50:9d"   exclude-virtual-ap "Test2-620-vap_prof" Dont forget … Continue reading Aruba620 -SSID Prunning on a specific AP

CCDA 640-864 Summary Notes – Day 3

Hierarchical Network Models Advantages Cost savings Ease of understanding becausee of simple design and lower management costs as monitoring systems are distributed. Network growth as changes are contained to a small subset  of the network and only impact that small area Easy to isolate a problem in the network if the hierarchial model is used … Continue reading CCDA 640-864 Summary Notes – Day 3

Summary Notes: JUNOS as a second Language

Differences between IOS and JUNOS. 1) JUNOS can be managed using the following options: CLI - Console, SSh and Telnet J-Web SNMP Junoscope Junos Script API NETCONF API SDX Service Deployment System 2) Using pipe show interfaces terse show interfaces terse | match se-3 show interfaces terse | except fe- show interfaces terse | count … Continue reading Summary Notes: JUNOS as a second Language