Cisco 7206 - VXR Router Configuration Manual page 163

Chapter 6 Configuring Port Channels
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m
You can configure the load-balancing mode to apply to all port channels that are configured on the entire
device or on specified modules. The per-module configuration takes precedence over the load-balancing
configuration for the entire device. You can configure one load-balancing mode for the entire device, a
different mode for specified modules, and another mode for the other specified modules. You cannot
configure the load-balancing method per port channel.
You can configure the type of load-balancing algorithm used. You can choose the load-balancing
algorithm that determines which member port to select for egress traffic by looking at the fields in the
frame.
The default load-balancing mode for Layer 3 interfaces is the source and destination IP address, and the
Note
default load-balancing mode for non-IP interfaces is the source and destination MAC address.
You can configure the device to use one of the following methods to load balance across the port
Note
channel:
• Destination MAC address
• Source MAC address
• Source and destination MAC address
Destination IP address
•
Source IP address
•
Source and destination IP address
•
Source TCP/UDP port number
•
Destination TCP/UDP port number
•
Source and destination TCP/UDP port number
•
Non-IP and Layer 3 port channels both follow the configured load-balancing method, using the source,
destination, or source and destination parameters. For example, when you configure load balancing to
use the source IP address, all non-IP traffic uses the source MAC address to load balance the traffic while
the Layer 3 traffic load balances the traffic using the source IP address. Similarly, when you configure
the destination MAC address as the load-balancing method, all Layer 3 traffic uses the destination IP
address while the non-IP traffic load balances using the destination MAC address.
Note You cannot configure load balancing using port channels per VDC. You must be in the default VDC to
configure this feature; if you attempt to configure this feature from another VDC, the system displays
an error.
You can configure load balancing either by the entire system or by specific modules, regardless of the
VDC. The port-channel load-balancing is a global setting across all VDCs.
If the ingress traffic is Multiprotocol Label Switching (MPLS) traffic, the software looks under the
labels for the IP address on the packet.
The load-balancing algorithms that use port channels do not apply to multicast traffic. Regardless of the
load-balancing algorithm you have configured, multicast traffic uses the following methods for load
balancing with port channels:
• Multicast traffic with Layer 4 information—Source IP address, source port, destination IP address,
destination port
OL-23435-03
Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x
Information About Port Channels
6-7