Archives by: JMCristobal

JMCristobal

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JMCristobal Posts

STP: Multiple Spanning-Tree

Enterprise Infrastructure
MST is a standard published by the IEEE to create different STP instances for groups of VLANs to have more than one STP topology approaching the Cisco mechanisms ...
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STP: Rapid PVST+ configuration

Enterprise Infrastructure
The iEEE 802.1w standard was developed using the main concepts of 802.1d (Common Spanning-Tree) but with a faster convergence time. It can be applied to single or multiple ...
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STP: Protection Features

Enterprise Infrastructure
Root Guard The Root Guard feature was developed as a means to control when a candidate root bridge switch connects to the network. It records the bridge ID ...
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STP: Optimization methods

Enterprise Infrastructure
Some additional methods allow faster STP convergence if a link failure occurs. Portfast Allows fast connectivity on ports by immediately switching to the Forwarding state without going through ...
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STP: PVST+ configuration

Enterprise Infrastructure
PVST+ (Peer-VLAN Spanning-Tree) First of all, let’s remember: Common spanning-Tree (CST) only handles one instance of STP on switches, based on 802.1Q trunks, by default over vlan 1 ...
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STP – Timers, Port Roles and States

Enterprise Infrastructure
Choosing root ports Once the root bridge is chosen, a Root Port must be chosen for each switch, which is not the root bridge. The root port always ...
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STP Overview

Enterprise Infrastructure
Spanning-Tree Protocol can exist between two devices (switches). Multiple active paths between devices cause loops in the network. STP is a layer 2 link management protocol that provides ...
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Etherchannel PAgP y LACP

Enterprise Infrastructure
The audio of the video is only in Spanish EtherChannels can be negotiated between two switches; there are two protocols for this negotiation: PAgP and LACP. PAgP (Port ...
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Etherchannel Overview

Enterprise Infrastructure
Etherchannel, also known as Link Aggregation, is a technology that allows grouping several physical interfaces that connect a pair of devices; when the etherchannel is established, the devices ...
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VTP – VLAN Trunking Protocol

Enterprise Infrastructure
VTP uses Layer 2 trunk links to communicate VLAN information within a group of switches. VTP manages the addition, deletion, and renaming of vlan names by sending VTP ...
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DTP – Dynamic Trunking Protocol

Enterprise Infrastructure
DTP is cisco’s proprietary protocol for negotiating trunking mode between two switches. A trunk link can only be negotiated between two switches if both belong to the same ...
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VLANs y Trunk Ports

Enterprise Infrastructure
The video is in Spanish only Trunk ports can carry two or more VLANs over a single switch port and are helpful when switches are connected to other ...
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VLANs y Access Port

Enterprise Infrastructure
The video is in Spanish only Virtual LAN – VLAN A VLAN defines a broadcast domain; they help us to create logical networks within the same switch with ...
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UDLD – UniDirectional Link Detection

Enterprise Infrastructure
UDLD is a Cisco proprietary Layer 2 protocol that monitors the state of a port to validate bidirectional communication. Recall that each port in a switch is bidirectional, ...
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LLDP – Link Layer Discovery Protocol

Enterprise Infrastructure
LLDP is similar to the CDP protocol but is based on the IEEE 802.1ab standard. The great advantage of LLDP is that it works on multi-vendor networks. Information ...
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