Reference Guide

394 | Link Aggregation Control Protocol
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Create a LAG
To create a dynamic port channel (LAG), define the LAG and then the LAG interfaces. Use the interface
port-channel
and switchport commands, as shown in Figure 19-1, which uses the example of LAG 32:
Figure 19-1. Placing a LAG into the Default VLAN
The LAG is in the default VLAN. To place the LAG into a non-default VLAN, use the tagged command
on the LAG (Figure 19-2):
Figure 19-2. Placing a LAG into a Non-default VLAN
Port-channel interfaces support link aggregation. They provide redundancy by aggregating physical
interfaces into a single logical interface. Port-channel interfaces can be used to create large-capacity
interfaces by utilizing a group of low-speed links. For more information, refer to the Port Channel
Interfaces section in the Interfaces chapter.
Configure the LAG interfaces as dynamic
After creating a LAG, configure the dynamic LAG interfaces. Figure 19-3 shows ports 3/15, 3/16, 4/15,
and 4/16 added to LAG 32 in LACP mode with the command
port-channel-protocol lacp.
Table 19-1. Number of Port-channels per Platform
Platform Port-channels Members/Channel
E-Series 255 16
C-Series 128 8
S-Series: S50 and S25 52 8
S-Series: S55, S60 and S4810 128 8
FTOS(conf)#interface port-channel 32
FTOS(conf-if-po-32)#no shutdown
FTOS(conf-if-po-32)#switchport
FTOS(conf)#interface vlan 10
FTOS(conf-if-vl-10)#tagged port-channel 32