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Command Line Interface
4-146
4
Command Usage
• For Fast Ethernet interfaces, the rate limit granularity is 512 Kbps, 1 Mbps, or
3.3 Mbps.
• For Gigabit Ethernet interfaces, the rate limit granularity is 33.3 Mbps.
Example
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 four trunks. For example, a
trunk consisting of two 1000 Mbps ports can support an aggregate bandwidth of
4 Gbps when operating at full duplex.
Console#show rate-limit
Fast ethernet granularity: 1000
Gigabit ethernet granularity: 33300
Console#
Table 4-49 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 4-131
channel-group Adds a port to a trunk IC (Ethernet) 4-147
Dynamic Configuration Command
lacp Configures LACP for the current interface IC (Ethernet) 4-148
lacp system-priority Configures a port's LACP system priority IC (Ethernet) 4-149
lacp admin-key Configures a port's administration key IC (Ethernet) 4-150
lacp admin-key Configures an port channel’s administration key IC (Port Channel) 4-151
lacp port-priority Configures a port's LACP port priority IC (Ethernet) 4-152
Trunk Status Display Command
show interfaces status
port-channel
Shows trunk information NE, PE 4-138
show lacp Shows LACP information PE 4-152