Alcatel-Lucent 7750 SR OS - Page 340

Configuration Commands
Page 340 7750 SR OS 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.
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 algorithm extension takes into account L4 information (i.e., src/dst L4-protocol
port).
The hashing index can be calculated according to the following algorithm:
If [(TCP or UDP traffic) & enabled]
hash (<TCP/UDP ports>, <IP addresses>)
else if (IP traffic)
hash (<IP addresses>)
else
hash (<MAC addresses>)
endif
This algorithm will be used in all cases where IP information in per-packet hashing is included (see
LAG and ECMP Hashing on page 104) except in the following cases:
• Fragmented packets
• Packets received from a VPRN tunnel.
Use of Layer 4 information (TCP/UDP ports) will not be used in following cases:
• Fragmented packets.
• Packets received from a VPRN tunnel.
Default no load-balancing-algorithm
Parameters option — Specifies the load balancing algorithm to be used on this port.
Values 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.
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.