Lenovo Flex System Fabric CN4093, Инструкция по применению

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© Copyright Lenovo 2017 Chapter 9: Ports and Link Aggregation (LAG)
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Configurable LAG Hash Algorithm
Traffic in a LAG is statistically distributed among member ports using a hash
process where various address and attribute bits from each transmitted frame are
recombined to specify the particular LAG port the frame will use. The CN4093 uses
the RTAG7 model for LAG hashing.
The switch can be configured to use a variety of hashing options. To achieve the
most even traffic distribution, select options that exhibit a wide range of values for
your particular network. Avoid hashing on information that is not usually present
in the expected traffic or which does not vary.
The CN4093 supports the following hashing options, which can be used in any
combination:
 For Layer 2 traffic, one of the following combinations may be applied:

Source MAC address (
smac
)

Destination MAC address (
dmac
)

Both source and destination MAC address (enabled by default)
Note:
At least one Layer 2 option must always be enabled; The
smac
and
dmac
options may not both be disabled at the same time.
 For Layer 3 IPv4/IPv6 traffic, one of the following are permitted:

Source IP address (
sip
)

Destination IP address (
dip
)

Both source and destination IP address (enabled by default)
If Layer 2 hashing is preferred for Layer 3 traffic, disable the Layer 3
sip
and
dip
hashing options and enable the
useL2
option:
CN 4093(config)# portchannel thash l2thash l2-source-mac-address
CN 4093(config)# portchannel thash l2thash l2-destination-mac-address
CN4093(config)# portchannel thash l2thash l2-source-destination-mac
CN 4093(config)# portchannel thash l3thash l3-source-ip-address
CN 4093(config)# portchannel thash l3thash l3-destination-ip-address
CN4093(config)# portchannel thash l3thash l3-source-destination-ip
CN 4093(config)# portchannel thash l3thash l3-use-l2-hash