SR
SR is expanded in three ways:
-
An optical interface specification for distances of less than 2 km.
-
A network router, for example, the 7750 SR, that supports the creation of IP and MPLS network-layer services such as IES and VPRN services.
-
Segment routing adds to the IS-IS and OSPF routing protocols the ability to perform shortest path routing and source routing using the concept of abstract segment.