Currently browsing category

9 Network Optimization

Enhanced Object Tracking

Object tracking is an IOS feature that allows separation between the object that is tracked and the action to be tacken when the status of that object changes. The objects to be tracked are identified by a NUMBER and different client applications (HSRP, GLBP, VRRP) can track the staus of …

AutoInstall

1.AutoInstall Process The autoinstall process discribed in the following paragraphs is used in autoconfiguration of a clean router (no config) over an IP network. The following flowchart best describes this process: Here are some details about the AutoInstall steps: 1.1 Assign IP Address The first step in the AutoInstall process …

Cisco CLI Tips and Tricks

1. Key shortcuts Key Combination Result Recalling Commands Ctrl+P or UP Moves backwards through command history Ctrl+N or DOWN Moves forward through command history Moving Cursor Ctrl+B or LEFT Moves 1 character to the left (Backward) Ctrl+F or RIGHT Moves 1 character to the right (Forward) ESC,B Moves 1 word …

SNMP and RMON 101

1. SNMP Basics SNMP requires a SNMP Manager (usually a NMS – Network Management System) that sends SNMP requests (get or set) and a SNMP Agent (usually running on the managed device – router, switch) that responds to these requests. The SNMP Agent listens for requests on UDP port 161. …

Logging 101

1. Configuring Logging Logging messages generated by the router are sent to the logging process. It controls the distribution of the messages to various destinations. If the logging process is off, then only the console receives log messages. To enable logging, use: Without this command only the console will receive …

IP Accounting 101

1. Enabling IP Accounting IP Accounting provides statistcs regarding the source and destination of the packets that are switched on an interface. Only outgoing traffic is accounted for and only traffic that is in transit, not generated by the router or that has the router as a destination. IP Accounting …

IP SLA 101

1. About IP SLA IP SLA is a feature that enables a router to monitor the status of a connection by measuring different KPIs. The SLA can be measured end-to-end from one host to another and is independent of the Layer 2 encapsulation. 2. Configuring IP SLA 2.1 Define the …

NetFlow 101

1. What is a flow A flow is defined by the combination of the following seven key fields: Source IP address Destination IP address Source port number Destination port number Layer 3 protocol type Type of service (ToS) Input logical interface 2. Gathering information Netflow requires CEF, so before beginning, …