isisd: Add advertise-high-metrics CLI/YANG support, modify show output

New config and show functionality:

r1# conf
r1(config)# router isis 1
r1(config-router)#
  advertise-high-metrics  Advertise high metric value on all interfaces
  area-password           Configure the authentication password for an area
  ...
r1(config-router)# advertise-high-metrics
r1(config-router)# end
r1# show isis summary
...
Area 1:
  Net: 49.0001.1720.1700.0002.00
  TX counters per PDU type:
     L2 IIH: 1
    P2P IIH: 36
   LSP RXMT: 0
  RX counters per PDU type:
  Advertise high metrics: Enabled
  Level-2:
   ...
r1# conf
r1(config)# router isis 1
r1(config-router)# no advertise-high-metrics
r1(config-router)# end
r1# show isis summary
...
Area 1:
  Net: 49.0001.1720.1700.0002.00
  TX counters per PDU type:
     L2 IIH: 1
    P2P IIH: 45
   LSP RXMT: 0
  RX counters per PDU type:
  Advertise high metrics: Disabled
  Level-2:
   ...
r1#

Signed-off-by: Isabella de Leon <ideleon@microsoft.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/yang/frr-isisd.yang b/yang/frr-isisd.yang
index ff3ba5d12b..0c2cf232fb 100644
--- a/yang/frr-isisd.yang
+++ b/yang/frr-isisd.yang
@@ -1169,6 +1169,13 @@ module frr-isisd {
           "Define the style of TLVs metric supported.";
       }
 
+      leaf advertise-high-metrics {
+        type boolean;
+        default "false";
+        description
+          "Advertise high metric value on all interfaces.";
+      }
+
       leaf purge-originator {
         type boolean;
         default "false";