Merge pull request sonic-net#75 from abdosi/202205

Chery pick of azure master PR # 16026

Author: abdosi

dockers/docker-fpm-frr/frr/bgpd/bgpd.main.conf.j2

@@ -93,6 +93,9 @@ router bgp {{ DEVICE_METADATA['localhost']['bgp_asn'] }}
 {% if get_ipv6_loopback_address(LOOPBACK_INTERFACE, "Loopback0") != 'None' %}
   address-family ipv6
     network {{ get_ipv6_loopback_address(LOOPBACK_INTERFACE, "Loopback0") | ip }}/64
+{% if DEVICE_METADATA['localhost']['switch_type'] == 'voq' or DEVICE_METADATA['localhost']['switch_type'] == 'chassis-packet' %}
+    network {{ get_ipv6_loopback_address(LOOPBACK_INTERFACE, "Loopback0") | ip }}/128 route-map HIDE_INTERNAL
+{% endif %}
   exit-address-family
 {% endif %}
 {% if ((multi_asic is defined and DEVICE_METADATA['localhost']['switch_type'] != 'chassis-packet') or (DEVICE_METADATA['localhost']['switch_type'] == 'voq')) %}

src/sonic-bgpcfgd/tests/data/sonic-cfggen/bgpd.main.conf.j2/packet_chassis.conf

@@ -46,6 +46,7 @@ router bgp 55555
 !
   address-family ipv6
     network fc00::1/64
+    network fc00::1/128 route-map HIDE_INTERNAL
   exit-address-family
 !
   network 10.10.10.1/24

src/sonic-bgpcfgd/tests/data/sonic-cfggen/bgpd.main.conf.j2/voq_chassis.conf

@@ -47,6 +47,7 @@ router bgp 55555
 !
   address-family ipv6
     network fc00::1/64
+    network fc00::1/128 route-map HIDE_INTERNAL
   exit-address-family
   address-family ipv6
     network fc00::2/128 route-map HIDE_INTERNAL