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Spanning Tree Design

Nov 20, 2011 · 2 min read · ccna 3 port-blocking configure cisco stp info

Optimizing STP topology. In the first topology an Access Layer switch is designated as a root bridge for the entire network. Choosing a good root bridge should be based on: Performance Redundancy Packets should travel from an access layer switch to a distribution layer switch to a core layer switch without the …

Basic IPv4 / IPv6 Routing

Nov 20, 2011 · 2 min read · routing protocol routes configure cisco commands

During your career as a Cisco network engineer you will have to deal understanding IPv6 address structure. So in this lab scenario you will learn to configure IPv4 and IPv6 networks on two routers then using RIP routing protocol you will configure WAN connectivity between. This lab has been created using …

Configurare topologie simpla GNS3 partea a 3-a

Sep 2, 2011 · 5 min read · routes ccna 2 gns3 routing protocol configure protocols cisco info

Obiective rutarea statica Configurare Vizualizare Depanare Odata puse ip-urile pe toate interfetele si pe toate PC-urile mai ramane configurat protocolul de rutare. Un router trebuie sa stie unde sa duca pachetele, acesta foloseste tabela de rutare, fara informatii actualizate acesta nu poate lua decizii corecte. Rout…

CDP

Sep 1, 2011 · 3 min read · ccna 2 gns3 configure basic cisco cdp commands info

Cisco Discovery Protocol - bun pentru obtinerea informatiilor de la alte routere sau swtich-uri direct conectate. - se trimit mesaje periodice (60s) - default pornit - contin informatii de genul: - tipul de device - interfetele cu care au legaturi - versiuni ale IOS - modelul device-ului Poate fi folosit ca un tool pe…

Configurare topologie simpla GNS3 partea a 2-a

Aug 31, 2011 · 6 min read · wireshark routes ccna 2 gns3 routing protocol configure basic protocols cisco part 2 commands

Continuarea configurarilor din topologia anterioara Obiective: Salvarea configuratilor (Topologie, Routere, PC-uri) Configurarea interfetei seriale de pe R2 Configurarea interfetei ethernet de pe R2 Altele Captura traficului prin Wireshark Salvarea configuratiilor Preambul: Routere/Switch-uri #copy running-confi…

Configurare topologie simpla GNS3

Aug 30, 2011 · 6 min read · routes ccna 2 linux routing protocol router hardware configure basic cisco commands

Topologie CCNA 2 3 routere 2 switch-uri simple 3 PC-uri Configurare adrese IP pentru host-uri sudo suhostname [nume]ifconfig eth0ifconfig eth0 <IP> netmask <NM> uproute add default gw <GW> eth0 Configurarea consolei si a liniilor virtuale VTY R1(config)#line console 0R1(config-line)#password ciscoR1(…

Network Security

Jul 10, 2011 · 6 min read · ccna 4 security SSH basic cisco commands info

Why is security important ? If the security of the network is compromised there could be seroious consequences such as: loss of privacy theft of information legal liabity As time went on, and attackers' methods and tools improved, attackers no longer required the same level of sophisticated knowledge. Common terms for…

VTP

Mar 14, 2011 · 5 min read · ccna 3 vtp port security VLAN cisco info

VLAN Trunking Protocol 1) Lab anterior Cerinte: Configurare manuala interfete de tip trunk Configurare manuala interfete de tip access Port-Security Maximum 3 1 static 2 dynamic Violation Protect Toate VLAN-urile la fiecare switch VLAN-uri: VLAN Spatiu de adrese Adrese 10 10.0.0.0/24 C1 –.1 C7 –.7 …

Port security

Feb 27, 2011 · 4 min read · ccna 3 port security configure switchport cisco commands

Securitatea la switch de nivelul de tip acces a) Port security b) port protected c) Port blocked d) Acces la switch fara parola e) Storm control a) Default nu e pornit Port Security Tipuri de atacuri oprite de Port Security - MAC address spoofing - schimbarea MAC-ului asignat de vendor cu un altul - Se aplica doar pen…

Routing Table

Jan 16, 2011 · 3 min read · routes rib ccna 2 cisco info

Principles 1. Every router makes its decision alone, based on the information it has in its own routing table. 2. The fact that one router has certain information in its routing table does not mean that other routers have the same information. 3. Routing information about a path from one network to another does not pr…

Routers

Jan 16, 2011 · 3 min read · router links router hardware ccna 2 cisco

Cisco IOS will not allow two active interfaces on the same router to belong to the same network. LAN Interfaces Ethernet interface also has a Layer 2 MAC address and participates in the Ethernet LAN in the same way as any other hosts on that LAN. For example, a router Ethernet interface participates in the ARP process…

Verifying Basic Router Configuration

Dec 22, 2010 · 5 min read · troubleshoot ccna 2 cisco commands

These commands are for viewing and debugging the configuration #show running-config This command displays the current running configuration that is stored in RAM. With a few exceptions, all configuration commands that were used will be entered into the running-config and implemented immediately by the IOS. R2#show run…

Routing protocols

Dec 5, 2010 · 3 min read · routes ccna 2 configure cisco

Some stuff about static and dynamic routing protocols, and IP assignment to interfaces. Directly connected: When configuring an interface with an IP address that interface will become a host on that network (it will have it’s own ip address) Before any static or dynamic routing is configured on a router, the router on…

Configuring a router

Dec 5, 2010 · 3 min read · ccna 2 configure basic cisco commands

Basic Router Configuration When configuring a router, certain basic tasks are performed including: Naming the router Setting passwords Configuring interfaces Configuring a banner Saving changes on a router Verifying basic configuration and router operations The first prompt appears at user mode. User mode allows you t…