User guide

Brocade 6910 Ethernet Access Switch Configuration Guide 289
53-1002581-01
Chapter
13Link Aggregation Commands
Ports can be statically grouped into an aggregate link (i.e., trunk) to increase the bandwidth of a
network connection or to ensure fault recovery. Or you can use the Link Aggregation Control
Protocol (LACP) to automatically negotiate a trunk link between this switch and another network
device. For dynamic trunks, the switches have to comply with LACP. This switch supports up to 12
trunks. For example, a trunk consisting of two 1000 Mbps ports can support an aggregate
bandwidth of 4 Gbps when operating at full duplex.
Guidelines for Creating Trunks
General Guidelines –
• Finish configuring trunks before you connect the corresponding network cables between
switches to avoid creating a loop.
• A trunk can have up to 8 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 and duplex mode), VLAN assignments, and CoS settings.
TABLE 65 Link Aggregation Commands
Command Function Mode
Manual Configuration Commands
interface port-channel Configures a trunk and enters interface configuration mode for
the trunk
GC
port channel
load-balance
Sets the load-distribution method among ports in aggregated
links
GC
channel-group Adds a port to a trunk IC (Ethernet)
Dynamic Configuration Commands
lacp Configures LACP for the current interface IC (Ethernet)
lacp admin-key Configures a port's administration key IC (Ethernet)
lacp port-priority Configures a port's LACP port priority IC (Ethernet)
lacp system-priority Configures a port's LACP system priority IC (Ethernet)
lacp admin-key Configures an port channel’s administration key IC (Port Channel)
lacp timeout Configures the timeout to wait for the next LACPDU IC (Port Channel)
Trunk Status Display Commands
show interfaces status
port-channel
Shows trunk information NE, PE
show lacp Shows LACP information PE
show port-channel
load-balance
Shows the load-distribution method used on aggregated links PE