[YANG MODEL] Fix breakout validation failed

[cyo-chang]

Why I did it

The interface fails to breakout when:

• IPv6 auto link-local address generation is enabled in interfaces or vlan.

admin@sonic:~$ cat /etc/sonic/config_dg.json
...omitted...
    "Ethernet46": {
        "ipv6_use_link_local_only": "enable"
    },
    "Ethernet47": {
        "ipv6_use_link_local_only": "enable"
    }
...omitted...

admin@sonic:~$ sudo config interface breakout Ethernet48 4x25G -y
Running Breakout Mode : 1x100G[40G]
Target Breakout Mode : 4x25G
...omitted...
sonic_yang(6):Note: Below table(s) have no YANG models: REST_SERVER, SNMP, SNMP_COMMUNITY, SNMP_TRAP_CONFIG, VXLAN_EVPN_NVO, VXLAN_TUNNEL, VXLAN_TUNNEL_MAP, XCVRD_LOG
sonic_yang(3):All Keys are not parsed in INTERFACE
dict_keys(['Ethernet46', 'Ethernet47'])
sonic_yang(3):exceptionList:["'ipv6_use_link_local_only'", "'ipv6_use_link_local_only'", 'Value not found for name ip-prefix in Ethernet46', 'Value not found for name ip-prefix in Ethernet47']
sonic_yang(3):Data Loading Failed:All Keys are not parsed in INTERFACE
dict_keys(['Ethernet46', 'Ethernet47'])
Data Loading Failed
All Keys are not parsed in INTERFACE
dict_keys(['Ethernet46', 'Ethernet47'])
ConfigMgmt Class creation failed
Failed to break out Port. Error: Failed to load the config. Error: ConfigMgmtDPB Class creation failed
...omitted...

• There is no default gateway in the static management IP.

admin@sonic:~$ cat /etc/sonic/config_dg.json
...omitted...
    "MGMT_INTERFACE": {
        "eth0|192.168.200.71/24": {}
    },
...omitted...

admin@sonic:~$ sudo config interface breakout Ethernet48 4x25G -y
Running Breakout Mode : 1x100G[40G]
Target Breakout Mode : 4x25G
...omitted...
sonic_yang(6):Note: Below table(s) have no YANG models: REST_SERVER, SNMP, SNMP_COMMUNITY, SNMP_TRAP_CONFIG, XCVRD_LOG
libyang[0]: Must condition "(contains(current(), ':') and contains(../gwaddr, ':')) or (contains(current(), '.') and contains(../gwaddr, '.'))" not satisfied. (path: /sonic-mgmt_interface:sonic-mgmt_interface/MGMT_INTERFACE/MGMT_INTERFACE_LIST[name='eth0'][ip_prefix='192.168.200.71/24']/ip_prefix)
sonic_yang(3):Data Loading Failed:Must condition "(contains(current(), ':') and contains(../gwaddr, ':')) or (contains(current(), '.') and contains(../gwaddr, '.'))" not satisfied.
Data Loading Failed
Must condition "(contains(current(), ':') and contains(../gwaddr, ':')) or (contains(current(), '.') and contains(../gwaddr, '.'))" not satisfied.
ConfigMgmt Class creation failed
Failed to break out Port. Error: Failed to load the config. Error: ConfigMgmtDPB Class creation failed
...omitted...

How I did it

Add 'ipv6_use_link_local_only' field to vlan and interface yang files.
Remove the restriction about no default gateway from mgmt-interface yang file.

How to verify it

Add 'ipv6_use_link_local_only' field and remove 'gwaddr' constraint, and apply breakout setting on interface, breakout process got successfully completed.

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205
• 202211

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: werty75708 / name: Chao Cheng, Chang (700b353)