Dynamic Profiles for VPLS Pseudowires
A router often has two types of interfaces:
- Static interfaces, which are configured before the router is booted
- Dynamic interfaces, which are created after the router is booted and while it is running
A VPLS pseudowire interface (such as lsi.1048576) is dynamically created by the system. Therefore, the logical interface unit number for the VPLS pseudowire is not available for in advance to configure characteristics such as VLAN identifiers and other parameters. As a result, certain VLAN manipulation features that are easily applied to static interfaces (such as xe-, ge-, and so on) are either not supported on dynamic interfaces or supported in an awkward fashion.
However, on MX Series routers, there is another configuration method that dynamic interfaces can use to determine their VLAN parameters when they are created by a running router: dynamic profiles. A dynamic profile is a conceptual container that includes parameters associated with a dynamic entity, parameters whose values are not know at the time the entity is configured. For more information about dynamic profiles, see the Junos Subscriber Access Configuration Guide.
There are many types of dynamic profiles. The two dynamic profiles that are used in conjunction with VLANs and VPLS are $junos-interface-ifd-name for a dynamic physical interface and $junos-underlying-unit-number for a dynamic logical interface (unit).
Dynamic profiles for VPLS are only supported on MX Series routers.
