Link Aggregation/Trunks
EtherChannel is cisco proprietary.
Groups multiple interfaces together as a virtual link.
These can either be setup manually or be put into states that may or may not auto configure them.
PAgP is Cisco's proprietary protocol for configuring links in an automated/semiautomated way.
It sends PAgP packets every 30s to communicate.
Interfaces are configured to be part of the channel-group and given a mode. This channel-group creates a virtual interface called a port-channel. These port channels are numbered.
The mode determines if the virtual interface is going to be up or not.
Modes for Cisco's PAgP are:
Hashing
Link aggregation
Configuration
When configuring link aggregation, you may create the virtual interface first or add the physical interfaces to a virtual interface and it will be created.
(config)#int range "g0/1-2"
(config-if-range)#channel-group "##" mode on
(config-if)#hardware multicast hw-hash
Groups multiple interfaces together as a virtual link.
These can either be setup manually or be put into states that may or may not auto configure them.
PAgP is Cisco's proprietary protocol for configuring links in an automated/semiautomated way.
It sends PAgP packets every 30s to communicate.
Interfaces are configured to be part of the channel-group and given a mode. This channel-group creates a virtual interface called a port-channel. These port channels are numbered.
The mode determines if the virtual interface is going to be up or not.
Modes for Cisco's PAgP are:
Hashing
Link aggregation
Configuration
On some cisco equipment you may need to specify the encapsulation type before being allowed to setup a trunk.
(config-if)#switchport trunk encapsulation dot1q
When configuring link aggregation, you may create the virtual interface first or add the physical interfaces to a virtual interface and it will be created.
(config)#int range "g0/1-2"
(config-if-range)#channel-group "##" mode on
(config-if)#hardware multicast hw-hash
L3
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Misc
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Misc