Alcatel-Lucent 7750 Configuration Manual page 417

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The hashing algorithm addresses finer spraying granularity where many hosts are connected to the network.
To address more efficient traffic distribution between network links (forming a LAG group), a hashing algo-
rithm extension takes into account Layer 4 information (src/dst L4-protocol port).
The hashing index can be calculated according to the following algorithm:
This algorithm will be used in all cases where IP information in per-packet hashing is included (see
and ECMP Hashing on page
the following cases:
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Default no load-balancing-algorithm
Parameters
option — Specifies the load balancing algorithm to be used on this port.
Values
pbb-etype
Syntax pbb-etype [0x0600..0xffff]
no pbb-etype
Context config>port>ethernet
Default 0x88E7
Description This command configures the Ethertype used for PBB encapsulation.
Values
7750 SR Interface Configuration Guide
include-l4 — Enables inherits system-wide settings including Layer 4 source and destination port
value in hashing algorithm.
exclude-l4 — Layer 4 source and destination port value will not be included in hashing.
no load-balancing-algorithm — Inherits system-wide settings.
If [(TCP or UDP traffic) & enabled]
hash (<TCP/UDP ports>, <IP addresses>)
else if (IP traffic)
hash (<IP addresses>)
else
hash (<MAC addresses>)
endif
120). However the Layer 4 information (TCP/UDP ports) will not be used in
Fragmented packets
include-l4 — Specifies that the source and destination ports are used in the hashing
algorithm.
exclude-l4 — Specifies that the source and destination ports are not used in the hashing
algorithm.
0x0600..0xffff: 1536 — 65535 (accepted in decimal or hex)
Interface Configuration
LAG
Page 417