Cisco Cisco 1700 2600 3600 3700 Series VPN Module White Paper

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With the Supervisor Engine 2T, additional hash schemes supporting the source and destination VLAN are

supported for up to 19 total options:

VSS2T(config)# port-channel load-balance ?

dst-ip Dst IP Addr

dst-mac Dst Mac Addr

dst-mixed-ip-port Dst IP Addr and TCP/UDP Port

dst-port Dst TCP/UDP Port

mpls Load Balancing for MPLS packets

src-dst-ip Src XOR Dst IP Addr

src-dst-mac Src XOR Dst Mac Addr

src-dst-mixed-ip-port Src XOR Dst IP Addr and TCP/UDP Port

src-dst-port Src XOR Dst TCP/UDP Port

src-ip Src IP Addr

src-mac Src Mac Addr

src-mixed-ip-port Src IP Addr and TCP/UDP Port

src-port Src TCP/UDP Port

vlan-dst-ip Vlan, Dst IP Addr

vlan-dst-mixed-ip-port Vlan, Dst IP Addr and TCP/UDP Port

vlan-src-dst-ip Vlan, Src XOR Dst IP Addr

vlan-src-dst-mixed-ip-port Vlan, Src XOR Dst IP Addr and TCP/UDP Port

vlan-src-ip Vlan, Src IP Addr

vlan-src-mixed-ip-port Vlan, Src IP Addr and TCP/UDP Port

Selection of the hash scheme of choice largely depends on the traffic mix through the Cisco EtherChannel

interface, noting that these hash schemes may be selected only on a global basis.

Determination of Hash Result

With the release of Cisco Virtual Switching System, a new mechanism has been implemented to allow you to

determine which physical link a given flow of traffic uses within a port-channel group. You provide inputs to the

command, and the hashing algorithm computes the physical link that is selected for the traffic mix and algorithm.

vss#sh etherchannel load-balance hash-result ?

interface Port-channel interface

ip IP address

ipv6 IPv6

l4port Layer 4 port number

mac Mac address

mixed Mixed mode: IP address and Layer 4 port number

mpls MPLS

vss#sh etherchannel load-balance hash-result interface port-channel 120 ip
192.168.220.10 192.168.10.10

Computed RBH: 0x4

Would select Gi1/2/1 of Po120