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Routing a class of traffic

Routing a class of traffic. draft-baker-fun-routing- class Fred Baker. Change of paradigm. Typical Internet routing (RIP, OSPF, IS-IS, BGP) routes to a destination Variation: OSPF supports routing to a destination using a DSCP

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Routing a class of traffic

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  1. Routing a class of traffic draft-baker-fun-routing-class Fred Baker

  2. Change of paradigm • Typical Internet routing (RIP, OSPF, IS-IS, BGP) routes to a destination • Variation: OSPF supports routing to a destination using a DSCP • Proprietary extensions: traffic matching an ACL is routed to a neighboring router • Generalization: • Traffic conforming to a certain description is routed somewhere (“route a class of traffic”) • Traffic class definition: • {destination, source|*, DSCP|*, …}

  3. Examples • Destination route • {D=prefix, S=::, *, …} • Route from IPTV-allocated prefix to IPTV ISP • {D=IPTV ISP, S=TV-prefix, *, …} • Route from ISP-allocated prefix to ISP • {D=2001::/3, S=ISP-prefix, *, …}

  4. Conceptual model • Replace “longest match” rule with “most specific” • Consider a route to be an aggregation of some number of host-to-host routes • Select the matching traffic class that does so most specifically • Aggregation of routes: • A traffic class that matches several more specific traffic classes is an aggregation of those traffic classes

  5. Implementation with DV or SPF algorithms • Discussed in draft in hand-wavy fashion • I won’t bore you here unless you really want me to…

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