MPLS Transport Profile (MPLS-TP)
Page 50 7210 SAS M, T, X, R6, Mxp MPLS Configura-
tion Guide
These values are used unless overridden at the LSP or PW end-points, and apply only to static
MPLS-TP LSPs and PWs.
In order to change the values, config>router>mpls>mpls-tp must be in the shutdown state. This
will bring down all of the MPLS-TP LSPs on the node. New values are propagated to the system
when a no shutdown is performed.
Static LSP and pseudowire (VC) Label and Tunnel Ranges
SR OS reserves a range of labels for use by static LSPs, and a range of labels for use by static
pseudowires (SVCs) that is, LSPs and pseudowires with no dynamic signaling of the label
mapping. These are configured as follows:
config
router
mpls-labels
static-labels max-lsp-labels 991 max-svc-labels 16384
The minimum label value for the static LSP label starts at 32 and expands all the way to the
maximum number specified. The static VC label range is contiguous with this. The dynamic label
range exists above the static VC label range (the label ranges for the respective label type are
contiguous). This prevents fragmentation of the label range.
The MPLS-TP tunnel ID range is configured as follows:
config
router
mpls
mpls-tp
[no] tp-tunnel-id-range 1 10
The tunnel ID range referred to here is a contiguous range of RSVP-TE Tunnel IDs is reserved for
use by MPLS TP, and these IDs map to the MPLS-TP Tunnel Numbers. There are some cases
where the dynamic LSPs may have caused fragmentation to the number space such that
contiguous range {max-min} is not available. In these cases, the command will fail.
There is no default value for the tunnel id range, and it must be configured to enable MPLS-TP.
If a configuration of the tunnel ID range fails, then the system will give a reason. This could be
that the initially requested range, or the change to the allocated range, is not available i.e. tunnel
IDs in that range have already been allocated by RSVP-TE. Allocated Tunnel IDs are visible using
a show command.
Note that changing the LSP or static VC label ranges does not require a reboot.
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