Archive for the ‘Switching’ Category
June 30th, 2008 | 
Author: Bitmindframes Study guides
Spanning Tree Protocol & Layer 2 Redundency.
Layer 2 redundency improves network availability with alternative network paths.
A simple path can be disrupted with little impact.
Redundency is achieved at the distribution & core through additional hardware & alternate paths.
Each Access Layer switch is connected to 2 different Distribution Layer switches.
Each Distribution Layer switch is connected to 2 Core Layer switches.
Spanning Tree Protocol is enabled by default.
Spanning Tree Protocol puts some ports into forwarding & others in blocking.
This prevents Layer 2 switching loops. Spanning Tree Protocol uses a redundant link if the primary fails.
Tags: vtp, cisco, switch, router, ip, guides
Bitmindframes cisco study guides
INTERVLAN ROUTING
A VLAN is a broadcast domain and unique ip subnet
Switches operate at layer2 (Data link Layer)
VLANS cannot communicate without L3 (Network Layer)
The L3 communication is called inter-vlan routing
Inter-vlan routing is a process of forwarding network traffic from one vlan to another using a router
The Subnets of your network facilitate the routing process.
Router interfaces can be connected to separate vlans.
Devices on vlans send traffic through the router(L3) to other vlans.
Traditionally vlan routing required multiple interfaces.
Each interface was connected to a separate switch port & configured with a different subnet
The switch port is connected to the router in access mode.
Tags: study, 802.1q, vtp, router, cisco, guides