Administrator Guide

16 Dell Campus Networking Interoperability with Cisco Catalyst 1.1 | version 1.1
First, interface port channel 5 is configured and a description is added. The port is activated as a switchport
and switchport trunking encapsulation dot1Q is enabled. The port channel is then removed from an
administrative shutdown state. The interface range 2/1 and 2/2 are enabled as switchports. Next, the ports
are added to port channel 5 and LACP negotiation is enabled unconditionally by using active. The ports are
then removed from an administrative shutdown state. Finally, the command show etherchannel summary is
issued in enabled mode to verify the port channel is configured properly.
C6504 #configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
C6504(config)#interface range tenGigabitEthernet 2/1-2
C6504(config-if-range)#switchport
C6504(config-if-range)#channel-group 5 mode active
C6504(config-if-range)#no shutdown
C6504(config-if-range)#exit
C6504(config)#interface port-channel 5
C6504(config-if)#description “LAG to Dell N3024”
C6504(config-if)#switchport
C6504(config-if)#switchport trunk encapsulation dot1q
C6504(config-if)#switchport mode trunk
C6504(config-if)#no shutdown
C6504(config-if)#end
C6504#show etherchannel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s – suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use N - not in use, no aggregation
f - failed to allocate aggregator
M - not in use, no aggregation due to minimum links not met
m - not in use, port not aggregated due to minimum links not met
u - unsuitable for bundling
d - default port
w - waiting to be aggregated
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel Protocol Ports
------+-------------+-----------+------------------------------
5 Po5(SU) LACP Te2/1(P) Te2/2(P)
Last applied Hash Distribution Algorithm: Fixed
2.4 Multiple Link Aggregation Groups
Multiple LAGs can be created to allow the three switches to be connected in a loop with redundant Ethernet
links. The diagram in Figure 7 shows the completed topology. The numbers labeled in the diagram represent
the port channel numbers specified during configuration.