Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Equal Cost Multiple Path (ECMP) support for Mapping of Address and Port with Encapsulation (MAP-E)

 

Equal Cost Multiple Path (ECMP) support for Mapping of Address and Port with Encapsulation (MAP-E)

This topic provides an overview of Equal Cost Multiple Path (ECMP) support for Mapping of Address and Port with Encapsulation (MAP-E) feature and its benefit to service providers when used as an inline service on MX Series routers with MPC and MIC interfaces.

In a MAP-E network topology, in the reverse path, the border relay router receives IPv4 traffic and encapsulates it in a IPv6 packet. Longer routes are used for faster matching. However, they do not facilitate EMCP load balancing on the PIC, as the routes point to a single PIC. Starting in 19.3R1, you can disable auto-routes by configuring the disable-auto-route statement at the [edit services softwire softwire-concentrator map-e <domain-name>] hierarchy, and direct the static routes to an ECMP load balancer. Hence, the packets can be distributed among different inline service interfaces.

Benefits

Enable load-balancing by distributing packets among different inline service interfaces.

Disabling auto-routes to support ECMP with Mapping of Address and Port with Encapsulation (MAP-E)

This example shows you how to disable auto-routes on a MAP-E Border Relay (BR) solution to support ECMP.

  1. Create service interface on the device with 100g bandwidth support.
  2. Configure the dual stack service interface unit 0.
  3. Configure service interface inside the dual stack domain.
  4. Configure service interface outside the dual stack domain.
  5. Configure the IPv4-facing interface on BR.
  6. Configure the CPE-facing interface on BR.
  7. Configure MAP-E domain 1 and associated parameters.
  8. Configure MAP-E domain 2 and associated parameters.
  9. Configure a softwire rule for MAP-E domain-1 to specify the direction of traffic to be tunneled.
  10. Configure a softwire rule for MAP-E domain-2 to specify the direction of traffic to be tunneled.
  11. Configure a single rule-set to combine both the rules.
  12. Configure the service set for MAP-E.
  13. Configure static routes for MAP-E BR IPv6 address.
  14. Enable load balancing.
  15. Verify the status of the routes.

    The service sets of the PICs have ecmp-rules configured and they carry the MAP-E rules of domain-1 and domain-2. From the output, you can understand that when the disable-auto-route is enabled and ecmp -rules configured, instead of the longer auto routes, static routes are created.

Related Documentation