Cisco 2100 Series Configuration Manual page 87

Chapter 3 Configuring Ports and Interfaces
The Catalyst 6500 series switches running in PFC3 or PFC3CXL mode implement enhanced
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EtherChannel load balancing. The enhanced EtherChannel load balancing adds the VLAN number
to the hash function, which is incompatible with LAG. From the 12.2(33)SXH and later releases,
Catalyst 6500 IOS software offers the exclude vlan keyword to the port-channel load-balance
command to implement src-dst-ip load distribution. See the Cisco IOS Interface and Hardware
Component Command Reference guide for more information.
Enter the show platform hardware pfc mode command on the Catalyst 6500 switch to confirm the
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PFC operating mode.
The following example shows a Catalyst 6500 series switch in PFC3B mode when you enter the
global configuration port-channel load-balance src-dst-ip command for proper LAG
functionality:
# show platform hardware pfc mode PFC operating mode
PFC operating mode : PFC3B
# show EtherChannel load-balance
EtherChannel Load-Balancing Configuration:
src-dst-ip
The following example shows Catalyst 6500 series switch in PFC3C mode when you enter the
exclude vlan keyword in the port-channel load- balance src-dst-ip exclude vlan command.
# show platform hardware pfc mode
PFC operating mode : PFC3C
# show EtherChannel load-balance
EtherChannel Load-Balancing Configuration:
src-ip enhanced
# mpls label-ip
If the recommended load-balancing method cannot be configured on the Catalyst switch, then
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configure the LAG connection as a single member link or disable LAG on the controller.
Figure 3-12
OL-17037-01
Link Aggregation with Catalyst 6500 Neighbor Switch
Cisco Wireless LAN Controller Configuration Guide
Enabling Link Aggregation
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