C
HAPTER
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| Link Aggregation Commands
Manual Configuration Commands
– 750 –
â—† Any of the Fast Ethernet ports on the front panel can be trunked
together, including ports of different media types.
â—† Any of the Gigabit Ethernet ports on the front panel can be trunked
together, including ports of different media types.
â—† All the ports in a trunk have to be treated as a whole when moved
from/to, added or deleted from a VLAN via the specified port-channel.
â—† STP, VLAN, and IGMP settings can only be made for the entire trunk via
the specified port-channel.
Dynamically Creating a Port Channel –
Ports assigned to a common port channel must meet the following criteria:
â—† Ports must have the same LACP system priority.
â—† Ports must have the same port admin key (Ethernet Interface).
â—† If the port channel admin key (lacp admin key - Port Channel) is not set
when a channel group is formed (i.e., it has the null value of 0), this
key is set to the same value as the port admin key (lacp admin key -
Ethernet Interface) used by the interfaces that joined the group.
â—† However, if the port channel admin key is set, then the port admin key
must be set to the same value for a port to be allowed to join a channel
group.
â—† If a link goes down, LACP port priority is used to select the backup link.
Manual Configuration Commands
channel-group This command adds a port to a trunk. Use the no form to remove a port
from a trunk.
SYNTAX
channel-group channel-id
no channel-group
channel-id - Trunk index (Range: 1-12)
DEFAULT SETTING
The current port will be added to this trunk.
COMMAND MODE
Interface Configuration (Ethernet)
COMMAND USAGE
â—† When configuring static trunks, the switches must comply with the
Cisco EtherChannel standard.
â—† Use no channel-group to remove a port group from a trunk.
â—† Use no interface port-channel to remove a trunk from the switch.
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