Reserved label blocks are used to reserve a set of labels for allocation for various applications. These reserved label blocks are separate from the existing ranges such as the static-labels-range, and are not tied to the bottom of the labels range. For example, a reserved range may be used as a Segment Routing Local Block (SRLB) for local segment identifiers (SIDs). Ranges are reserved from the dynamic label range and up to four reserved label block ranges may be configured on a system.
A reserved label block is configured using the following:
config
router
mpls-labels
reserved-label-block <name>
start <start-value> end <end-value>
exit
no reserved-label-block <name
A range can be configured up to the maximum supported MPLS label value on the system.