SRv6 TE Policy is a tunneling technology developed based on SRv6.
Before configuring an SRv6 TE Policy, configure an IGP to implement network layer connectivity.
An SRv6 TE Policy is a set of candidate paths consisting of one or more segment lists, that is, segment ID (SID) lists. Each SID list identifies an end-to-end path from the source to the destination, instructing a device to forward traffic through the path rather than the shortest path computed using an IGP. The header of a packet steered into an SRv6 TE Policy is augmented with an ordered list of segments associated with that SR Policy, so that other devices on the network can execute the instructions encapsulated into the list.
Headend: node where an SRv6 TE Policy is generated.
Color: extended community attribute of an SRv6 TE Policy. A BGP route can recurse to an SRv6 TE Policy if the route has the same color attribute as the policy.
Endpoint: destination address of an SRv6 TE Policy.
Color and endpoint information is added to an SRv6 TE Policy through configuration. In path computation, a forwarding path is computed based on the color attribute that meets SLA requirements. The headend steers traffic into an SRv6 TE Policy whose color and endpoint attributes match the color value and next-hop address in the associated route, respectively. The color attribute defines an application-level network SLA policy. This allows network paths to be planned based on specific SLA requirements for services, realizing service value in a refined manner and helping build new business models.