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, 18 insertions, 0 deletions

diff --git a/isisd/isis_nb_config.c b/isisd/isis_nb_config.c
index ea021a4ff5..2b3355bc9f 100644
--- a/isisd/isis_nb_config.c
+++ b/isisd/isis_nb_config.c
@@ -361,6 +361,24 @@ int isis_instance_overload_on_startup_modify(struct nb_cb_modify_args *args)
 }
 
 /*
+ * XPath: /frr-isisd:isis/instance/advertise-high-metrics
+ */
+int isis_instance_advertise_high_metrics_modify(struct nb_cb_modify_args *args)
+{
+	struct isis_area *area;
+	bool advertise_high_metrics;
+
+	if (args->event != NB_EV_APPLY)
+		return NB_OK;
+
+	advertise_high_metrics = yang_dnode_get_bool(args->dnode, NULL);
+	area = nb_running_get_entry(args->dnode, NULL, true);
+	isis_area_advertise_high_metrics_set(area, advertise_high_metrics);
+
+	return NB_OK;
+}
+
+/*
  * XPath: /frr-isisd:isis/instance/metric-style
  */
 int isis_instance_metric_style_modify(struct nb_cb_modify_args *args)