Link Aggregation Commands
4-147
4
Link 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 static trunks, the switches have
to comply with the Cisco EtherChannel standard. For dynamic trunks, the switches
have to comply with LACP. This switch supports up to six trunks. For example, a
trunk consisting of two 1000 Mbps ports can support an aggregate bandwidth of
4 Gbps when operating at full duplex.
GVRP Status Shows if GARP VLAN Registration Protocol is enabled or disabled (page 4-191).
Allowed VLAN Shows the VLANs this interface has joined, where “(u)” indicates untagged and
“(t)” indicates tagged (page 4-200).
Forbidden VLAN Shows the VLANs this interface can not dynamically join via GVRP (page
4-201).
Private VLAN Mode Shows the private VLAN mode as host, promiscuous, or none.
Private VLAN
Host-association
Shows the secondary (or community) VLAN with which this port is associated.
Private VLAN Mapping Shows the primary VLAN mapping for a promiscuous port.
Table 4-4 Link Aggregation Commands
Command Function Mode Page
Manual Configuration Commands
interface port-channel Configures a trunk and enters interface
configuration mode for the trunk
GC 4-135
channel-group Adds a port to a trunk IC (Ethernet) 4-148
Dynamic Configuration Commands
lacp Configures LACP for the current interface IC (Ethernet) 4-149
lacp system-priority Configures a port's LACP system priority IC (Ethernet) 4-150
lacp admin-key Configures a port's administration key IC (Ethernet) 4-151
lacp admin-key Configures a port channel’s administration key IC (Port Channel) 4-152
lacp port-priority Configures a port's LACP port priority IC (Ethernet) 4-153
Trunk Status Display Commands
show interfaces status
port-channel
Shows trunk information NE, PE 4-143
show lacp Shows LACP information PE 4-154
Table 4-3 show interfaces switchport - display description (Continued)
Field Description
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