Alcatel-Lucent 7450 Basic System Configuration Manual page 347

eth-encap-ip — The hash algorithm parses down the label stack (up to 3 labels supported) and
mc-enh-load-balancing
Syntax [no] mc-enh-load-balancing
Context config>system>load-balancing
Description
This command enables enhanced egress multicast load balancing behavior for Layer 3 multicast. When
enabled, the router will spray the multicast traffic using as hash inputs from the packet based on lsr-
load-balancing, l4-load-balancing and system-ip-load-balancing configurations. That is, an ingress
LER or IP PE will spray traffic based on the IP hash criteria: SA/DA + optional Layer 4 port + optional
system IP egress LER or LSR - will spray traffic based on label or IP hash criteria outlined above or
both based on configuration of lsr-load-balancing, l4-load-balancing, and system-ip-load-balancing.
The no form of the command preserves the default behavior for per flow hashing of multicast traffic.
service-id-lag-hashing
Syntax [no] service-id-lag-hashing
Context config>system>load-balancing
Description
This command enables enhanced VLL LAG service ID hashing. This command improves the LAG
spraying of VLL service packets and is applied only when both ECMP and LAG hashing are
performed by the same router. By default, the ECMP interface and LAG link for all packets on the VLL
service are selected based on a direct modulo operation of the service ID. This command enhances
distribution and hashes the service ID prior to the LAG link modulo operation when an ECMP link
modulo operation is performed.
The no form of the command preserves the default behavior of VLL LAG service ID hashing.
system-ip-load-balancing
Syntax system-ip-load-balancing
no system-ip-load-balancing
Context config>system>load-balancing
Basic System Configuration Guide
once it hits the bottom, the stack assumes Ethernet II non-tagged header follows. At the
expected Ethertype offset location, the algorithm checks whether the value present is IPv4/v6
(0x0800 or 0x86DD). If the check passes, the hash algorithm checks the first nibble at the
expected IP header location for IPv4/IPv6 (0x0100/0x0110). If the secondary check passes,
the hash is performed using IP SA/DA fields in the expected IP header; if any of the checks
fail, the label-stack hash is performed.
System Management
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