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doc: add 'mpls label dynamic-block' information

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Add information on the 'mpls label dynamic-block'
command.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
This commit is contained in:
Philippe Guibert 2023-10-03 10:58:25 +02:00
parent dfb56806af
commit 66c85fde7e
1 changed files with 25 additions and 0 deletions
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doc/user/zebra.rst
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@ -783,6 +783,22 @@ presence of the entry.
21 Static 10.125.0.2 IPv4 Explicit Null
MPLS label chunks
-----------------
MPLS label chunks are handled in the zebra label manager service,
which ensures a same label value or label chunk can not be used by
multiple CP routing daemons at the same time.
Label requests originate from CP routing daemons, and are resolved
over the default MPLS range (16-1048575). There are two kind of
requests:
- Static label requests request an exact label value or range. For
instance, segment routing label blocks requests originating from
IS-IS are part of it.
- Dynamic label requests only need a range of label values. The
'bgp l3vpn export auto' command uses such requests.
Allocated label chunks table can be dumped using the command
.. clicmd:: show debugging label-table
@ -796,6 +812,15 @@ Allocated label chunks table can be dumped using the command
Proto ospf: [20000/21000]
Proto isis: [22000/23000]
.. clicmd:: mpls label dynamic-block (16-1048575) (16-1048575)
Define a range of labels where dynamic label requests will
allocate label chunks from. This command guarantees that
static label values outside that range will not conflict
with the dynamic label requests. When the dynamic-block
range is configured, static label requests that match that
range are not accepted.
.. _zebra-srv6:
Segment-Routing IPv6