Link Aggregation Commands
4-131
4
Guidelines for Creating Trunks
General Guidelines –
• Finish configuring port trunks before you connect the corresponding network
cables between switches to avoid creating a loop.
• A trunk can have up to eight ports.
• The ports at both ends of a connection must be configured as trunk ports.
• All ports in a trunk must be configured in an identical manner, including
communication mode (i.e., speed, duplex mode and flow control), VLAN
assignments, and CoS settings.
• 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.
• 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:
• Ports must have the same LACP system priority.
• Ports must have the same port admin key (Ethernet Interface).
• 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.
• 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.
• If a link goes down, LACP port priority is used to select the backup link.
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: 1-32)
Default Setting
The current port will be added to this trunk.
Command Mode
Interface Configuration (Ethernet)
Command Usage
• When configuring static trunks, the switches must comply with the Cisco
EtherChannel standard.
• Use
no channel-group
to
remove a port group from a trunk.
• Use
no interfaces port-channel
to remove a trunk from the switch.
Summary of Contents for TL-SG5426 -
Page 1: ...TL SG5426 26 Port Gigabit Managed Switch Rev 1 0 0 1910010105...
Page 17: ...Contents xiv...
Page 21: ...Tables xviii...
Page 25: ...Figures xxii...
Page 42: ...Initial Configuration 2 10 2...
Page 107: ...Configuring the Switch 3 64 3 Figure 3 41 802 1X Port Configuration...
Page 486: ...Software Specifications A 4 A...