Tag Archives: Cisco

Setting up Cisco EtherChannels – Static, PAgP, and LACP

Posted on June 2, 2011 by Humair

In this lab I used a Cisco Catalyst WS-C3750G-24TS switch [IOS 12.2(25)SEE3] and a Cisco Catalyst WS-C3560G-24TS switch [IOS 12.2(40)SE]. I also physically connected GigabitEthernet 1/0/17 on the Catalyst 3750G to GigabitEthernet 0/17 on the Catalyst 3560G; I did the … Continue reading →

Posted in Cisco, Labs, Networking, Protocols | Tagged Cisco, Cisco Catalyst, Cisco Catalyst WS-C3560G-24TS, Cisco Catalyst WS-C3750G-24TS, etherchannel, LACP, PAgP, port channel, static etherchannel | 1 Comment

Cisco Port Security with Dynamic MAC Address Learning

Posted on May 31, 2011 by Humair

In this lab I used a Cisco Catalyst WS-C3560G-24TS switch [IOS Version 12.2(40)SE]. Using Cisco Port Security it is possible to associate a static MAC address to a physical port on a switch. This only allows one host with that … Continue reading →

Posted in Cisco, Labs, Networking, Technology | Tagged Cisco, Cisco Catalyst 3560 switch, Cisco Catalyst WS-C3560G-24TS, Cisco Port Security, Cisco Port Security with Dynamic MAC Address Learning, Dynamic Port Security, MAC address, Port Security, router, switch, switchport port-security, switchport port-security violation | 4 Comments

Functionality of Layer 2 Switches/Bridges

Posted on May 26, 2011 by Humair

Layer 2 switches and bridges switch frames on a network while layer 3 routers route packets between networks. I once heard a network engineer being asked if a network can be made faster if the network is optimized to use … Continue reading →

Posted in Networking, Technology | Tagged Address Learning, application specific integrated circuits, ASICs, bridges, bridging technologies, broadcasts, Cisco, collision domain, collision domains, datalink layer, filter table, Forward/Filter Decisions, frame, frame filtering, frames, layer 2 broadcasts, Layer 2 Switching, Loop Avoidance, MAC, MAC address, MAC address table, MAC database, Media Access Control, Media Access Control Address, multicasts, network, network layer, network loops, networking, packet, packets, routers, slow convergence, Spanning Tree Protocol, STP, switches, switching | 1 Comment

Setup SSH Access on Cisco Switches

Posted on May 20, 2011 by Humair

The Cisco Catalyst WS-C3750G-24TS [IOS 12.2(25)SEE3] switch provides both layer 2 and layer 3 functionality. In this lab I’m going to demonstrate how to setup SSH access to the switch. The first thing I do is set a hostname and … Continue reading →

Posted in Cisco, Labs, Networking, Technology | Tagged Catalyst, Cisco, Cisco Catalyst 3570, Cisco Catalyst WS-C3750G-24TS, default route, router, SSH, switch | Leave a comment

Discovery Protocols on Cisco, HP, and Force10 Switches/Routers – CDP and LLDP

Posted on April 23, 2011 by Humair

The Cisco Discovery Protocol (CDP) is a Cisco proprietary Data Link Layer network protocol used to share information about other directly connected Cisco equipment. CDP can also be used in place of dynamic routing protocols in simple networks. Cisco devices … Continue reading →

Posted in Cisco, Force10 Networks, HP, Networking, Protocols | Tagged 2621XM, CDP, Cisco, Cisco 2621XM, Cisco Discovery Protocol, Force10, Force10 Networks, Force10 S60, HP, HP Procurve, IEEE 802.1AB, Link Layer Discovery Protocol, LLDP, Procurve, S60 | 2 Comments

Setup Inter-VLAN Communication via “Router on a Stick”

Posted on March 30, 2011 by Humair

This lab demonstrates inter-VLAN communication via the “Router on a Stick” method. To enable inter-VLAN communication, a trunk link is created between a router and switch. Trunk links can carry traffic for multiple VLANS. Trunk links can also be used … Continue reading →

Posted in Cisco, Labs, Networking | Tagged Cisco, Cisco 2611 router, Cisco C3560G switch, Cisco WS-C3560G-24TS switch, inter-VLAN communication, ios, router, Router on a Stick, switch, trunk, trunk links, trunk port, trunk ports, Trunking, trunks, vlan | 5 Comments