config: add mpls label range configuration

you can specify mpls label range from which gobgpd automatically assign to
vpn routes like below

```
[Global]
  As = 65000
  RouterId = "192.168.255.1"
  [Global.MplsLabelRange]
    MinLabel = 1000
    MaxLabel = 1999
```

default values (min:16000, max:1048575) is taken from cisco ios xr.

Signed-off-by: ISHIDA Wataru <ishida.wataru@lab.ntt.co.jp>

1 files changed, 13 insertions, 0 deletions

diff --git a/tools/pyang_plugins/gobgp.yang b/tools/pyang_plugins/gobgp.yang
index aff25752..c1107ea6 100644
--- a/tools/pyang_plugins/gobgp.yang
+++ b/tools/pyang_plugins/gobgp.yang
@@ -641,4 +641,17 @@ module bgp-gobgp {
       }
     }
   }
+
+  augment "/bgp:bgp/bgp:global" {
+    container mpls-label-range {
+      description "mpls labal range";
+
+      leaf min-label {
+          type uint32;
+      }
+      leaf max-label {
+          type uint32;
+      }
+    }
+  }
 }