RSVP-TE - Admin Group Extended Range

In MPLS traffic engineering, you can configure a link with a set of administrative groups (also known as colors, resource classes, or affinity bits). Administrative groups are carried in the interior gateway protocol (IGP) (OSPFv2 and IS-IS) as a 32-bit value assigned to each link. The router normally interprets this 32-bit value as a bit mask with each bit representing a group, limiting each network to a total of 32 distinct administrative groups (value range 0 through 31). With extended administrative groups support, you can use multiple 32-bit values, expanding the number of administrative groups supported in the network beyond just 32. The original range of values available for administrative groups is still supported for backward compatibility. The extended administrative groups configuration accepts a set of interfaces with a corresponding set of extended administrative group names. It converts the names into a set of 32-bit values and propagates this information into the IGP. The extended administrative group values are global and must be identically configured on all the supported routers participating in the network. The domain-wide extended administrative groups database, learned from other routers through IGP flooding, is used by Constrained Shortest Path First (CSPF) for path computation.