Weighted Ecmp For Sdps - Nokia 7705 SAR-W Series Manual

MPLS and RSVP-TE
Weighted ECMP is enabled using the config>service>epipe>bgp-evpn>mpls>
auto-bind-tunnel>weighted-ecmp command or config>service>vpls>bgp-
evpn>mpls>auto-bind-tunnel>weighted-ecmp command. These commands
allow packets to be sprayed across LSPs in the ECMP set according to the outcome
of the hash algorithm and the configured load-balancing weight of each LSP.
EVPN VPWS ECMP and weighted ECMP behave like a non-EVPN Layer 2 Epipe
and perform per-service ID hashing.
EVPN VPLS ECMP and weighted ECMP behave like a non-EVPN Layer 2 VPLS and
perform per-service ID hashing but also include an internal egress ID.

3.13.3 Weighted ECMP for SDPs

Weighted ECMP for IES or VPRN Layer 3 spoke SDP interfaces, Epipe and Ipipe
services with SDPs, and VPLS services with spoke or mesh SDPs is enabled using
the config>service>sdp>weighted-ecmp command. This command is applicable
when the SDP has RSVP-TE LSPs configured using the config>service>sdp>lsp
command or SR-TE LSPs configured using the config>service>sdp>sr-te-lsp
command.
When weighted ECMP is enabled on an SDP, a path is selected based on the
configured hash. Paths are then load-balanced across the LSPs used by the SDP
according to the normalized LSP load-balancing weight configured using the
load-balancing-weight command. This means that consecutive packets of a
particular service use the same LSP, but the overall load handled by LSPs to the
SDP far end is balanced according to the load-balancing weight if all services using
the SDP send the same bandwidth and there are more services using the SDP than
there are LSPs for the SDP.
If an LSP in the ECMP set has no load-balancing weight configured, ECMP is applied
to packets based on the output of the hash for the service ID.
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MPLS Guide
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