RFC 5640-2009
Load-Balancing for Mesh Softwires

Standard No.
RFC 5640-2009
Release Date
2009
Published By
IETF - Internet Engineering Task Force
Latest
RFC 5640-2009
Scope
Payloads transported over a Softwire mesh service (as defined by BGP Encapsulation Subsequent Address Family Identifier (SAFI) information exchange) often carry a number of identifiable@ distinct flows. It can@ in some circumstances@ be desirable to distribute these flows over the equal cost multiple paths (ECMPs) that exist in the packet switched network. Currently@ the payload of a packet entering the Softwire can only be interpreted by the ingress and egress routers. Thus@ the load-balancing decision of a core router is only based on the encapsulating header@ presenting much less entropy than available in the payload or the encapsulated header since the Softwire encapsulation acts in a tunneling fashion. This document describes a method for achieving comparable load-balancing efficiency in a network carrying Softwire mesh service over Layer Two Tunneling Protocol - Version 3 (L2TPv3) over IP or Generic Routing Encapsulation (GRE) encapsulation to what would be achieved without such encapsulation.

RFC 5640-2009 history




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