Specifications

Chapter 6. IBM Virtual Fabric 10Gb Switch Module implementation 267
Trunk hash parameters are set globally. You can enable one or two parameters to
configure any of the following valid combinations:
– SMAC (source MAC only)
– DMAC (destination MAC only)
– SIP (source IP only)
– DIP (destination IP only)
– SIP + DIP (source IP and destination IP)
– SMAC + DMAC (source MAC and destination MAC)
For trunk hashing configuration commands, see Table 6-1.
Table 6-1 Trunk hashing configuration commands
In our reference architecture, source-destination MAC address, source-destination IP
address, ingress, and L4 port hashing are enabled by default. To configure the hashing
options, run portchannel thash with the appropriate options (Example 6-22).
Example 6-22 Configure trunk hashing
ACC-3#configure terminal
Enter configuration commands, one per line. End with Ctrl/Z.
ACC-3(config)#portchannel thash l2thash l2-source-mac-address
ACC-3(config)#portchannel thash ingress
ACC-3(config)#^Z
ACC-3#
Run show portchannel hash to verify the global hash parameters.
Example 6-23 Trunk hashing parameters
ACC-3#show portchannel hash
Current L2 trunk hash settings:
smac dmac
Current L3 trunk hash settings:
sip dip
Current ingress port hash: enabled
Hash options VFSM command
Layer 2
SMAC portchannel thash l2thash l2-source-mac-address
DMAC portchannel thash l2thash l2-destination-mac-address
SMAC+DMAC portchannel thash l2thash l2-source-destination-mac
Layer 3
SIP portchannel thash l3thash l3-source-ip-address
DIP portchannel thash l3thash l3-destination-ip-address
SIP+DIP portchannel thash l3thash l3-source-destination-ip
L3 use L2 portchannel thash l3thash l3-use-l2-hash
Other options
Ingress port portchannel thash ingress
L4 port portchannel thash L4port