Fix IPV6 forced-mgmt-route not work issue (#17299)

ix IPV6 forced-mgmt-route not work issue

Why I did it
IPV6 forced-mgmt-route not work

When add a IPV6 route, should use 'ip -6 rule add pref 32764 address' command, but currently in the template the '-6' parameter are missing, so the IPV6 route been add to IPV4 route table.

Also this PR depends on #17281 , which will fix the IPV6 'default' route table missing in IPV6 route lookup issue. 

Microsoft ADO (number only):24719238

Author: liuh-80

files/image_config/interfaces/interfaces.j2

@@ -86,7 +86,7 @@ iface {{ name }} {{ 'inet' if prefix | ipv4 else 'inet6' }} static
     up ip {{ '-4' if prefix | ipv4 else '-6' }} route add {{ prefix | network }}/{{ prefix | prefixlen }} dev {{ name }} table {{ vrf_table }}
     up ip {{ '-4' if prefix | ipv4 else '-6' }} rule add pref {{ force_mgmt_route_priority + 1 }} from {{ prefix | ip }}/{{ '32' if prefix | ipv4 else '128' }} table {{ vrf_table }}
 {% for route in MGMT_INTERFACE[(name, prefix)]['forced_mgmt_routes'] %}
-    up ip rule add pref {{ force_mgmt_route_priority }} to {{ route }} table {{ vrf_table }}
+    up ip {{ '-4' if prefix | ipv4 else '-6' }} rule add pref {{ force_mgmt_route_priority }} to {{ route }} table {{ vrf_table }}
 {% endfor %}
 {% if prefix | ipv6 and vrf_table == 'default'%}
     # IPV6 default table not add to lookup by default, management server need this to access IPV6 address when BGP shutdown
@@ -97,7 +97,7 @@ iface {{ name }} {{ 'inet' if prefix | ipv4 else 'inet6' }} static
     pre-down ip {{ '-4' if prefix | ipv4 else '-6' }} route delete {{ prefix | network }}/{{ prefix | prefixlen }} dev {{ name }} table {{ vrf_table }}
     pre-down ip {{ '-4' if prefix | ipv4 else '-6' }} rule delete pref {{ force_mgmt_route_priority + 1 }} from {{ prefix | ip }}/{{ '32' if prefix | ipv4 else '128' }} table {{ vrf_table }}
 {% for route in MGMT_INTERFACE[(name, prefix)]['forced_mgmt_routes'] %}
-    pre-down ip rule delete pref {{ force_mgmt_route_priority }} to {{ route }} table {{ vrf_table }}
+    pre-down ip {{ '-4' if route | ipv4 else '-6' }} rule delete pref {{ force_mgmt_route_priority }} to {{ route }} table {{ vrf_table }}
 {% endfor %}
 {% if prefix | ipv6 and vrf_table == 'default'%}
     pre-down ip -6 rule delete pref {{ force_mgmt_route_priority + 3 }} lookup {{ vrf_table }}

src/sonic-config-engine/minigraph.py

@@ -1459,6 +1459,33 @@ def select_mmu_profiles(profile, platform, hwsku):
                 base_file = os.path.join(path, file_item)
                 exec_cmd(["sudo", "cp", file_in_dir, base_file])
 
+def address_type(address):
+    # encode and decode to unicode, because when address is bytes type, ip_network will throw AddressValueError
+    # set strict to False because address may set host bit, for example 192.168.0.1/24
+    return type(ipaddress.ip_network(UNICODE_TYPE(address), False))
+
+def update_forced_mgmt_route(mgmt_intf, mgmt_routes):
+    for mgmt_intf_key in mgmt_intf.keys():
+        forced_mgmt_routes = []
+
+        try:
+            # get mgmt interface type
+            mgmt_intf_addr = mgmt_intf_key[1]
+            mgmt_iftype = address_type(mgmt_intf_addr)
+
+            # add mgmt route to different mgmt interface by address type
+            for mgmt_route in mgmt_routes:
+                route_iftype = address_type(mgmt_route)
+                if mgmt_iftype == route_iftype:
+                    forced_mgmt_routes.append(mgmt_route)
+        except ValueError as e:
+            print("Warning: invalid management routes in minigraph, exception: {}".format(e), file=sys.stderr)
+            continue
+
+        # forced_mgmt_routes yang model not support empty list
+        if len(forced_mgmt_routes) > 0:
+            mgmt_intf[mgmt_intf_key]['forced_mgmt_routes'] = forced_mgmt_routes
+
 ###############################################################################
 #
 # Main functions
@@ -1700,8 +1727,7 @@ def parse_xml(filename, platform=None, port_config_file=None, asic_name=None, hw
     results['BGP_VOQ_CHASSIS_NEIGHBOR'] = bgp_voq_chassis_sessions
     results['BGP_SENTINELS'] = bgp_sentinel_sessions
     if mgmt_routes:
-        # TODO: differentiate v4 and v6
-        next(iter(mgmt_intf.values()))['forced_mgmt_routes'] = mgmt_routes
+        update_forced_mgmt_route(mgmt_intf, mgmt_routes)
     results['MGMT_PORT'] = {}
     results['MGMT_INTERFACE'] = {}
     mgmt_intf_count = 0

src/sonic-config-engine/tests/sample_output/py2/mvrf_interfaces

@@ -34,14 +34,14 @@ iface eth0 inet static
     up ip -4 route add default via 10.0.0.1 dev eth0 table 5000 metric 201
     up ip -4 route add 10.0.0.0/24 dev eth0 table 5000
     up ip -4 rule add pref 32765 from 10.0.0.100/32 table 5000
-    up ip rule add pref 32764 to 11.11.11.11 table 5000
-    up ip rule add pref 32764 to 22.22.22.0/23 table 5000
+    up ip -4 rule add pref 32764 to 11.11.11.11 table 5000
+    up ip -4 rule add pref 32764 to 22.22.22.0/23 table 5000
     # management port down rules
     pre-down ip -4 route delete default via 10.0.0.1 dev eth0 table 5000
     pre-down ip -4 route delete 10.0.0.0/24 dev eth0 table 5000
     pre-down ip -4 rule delete pref 32765 from 10.0.0.100/32 table 5000
-    pre-down ip rule delete pref 32764 to 11.11.11.11 table 5000
-    pre-down ip rule delete pref 32764 to 22.22.22.0/23 table 5000
+    pre-down ip -4 rule delete pref 32764 to 11.11.11.11 table 5000
+    pre-down ip -4 rule delete pref 32764 to 22.22.22.0/23 table 5000
 iface eth0 inet6 static
     address 2603:10e2:0:2902::8
     netmask 64
@@ -53,10 +53,12 @@ iface eth0 inet6 static
     up ip -6 route add default via 2603:10e2:0:2902::1 dev eth0 table 5000 metric 201
     up ip -6 route add 2603:10e2:0:2902::/64 dev eth0 table 5000
     up ip -6 rule add pref 32765 from 2603:10e2:0:2902::8/128 table 5000
+    up ip -6 rule add pref 32764 to 33:33:33::0/64 table 5000
     # management port down rules
     pre-down ip -6 route delete default via 2603:10e2:0:2902::1 dev eth0 table 5000
     pre-down ip -6 route delete 2603:10e2:0:2902::/64 dev eth0 table 5000
     pre-down ip -6 rule delete pref 32765 from 2603:10e2:0:2902::8/128 table 5000
+    pre-down ip -6 rule delete pref 32764 to 33:33:33::0/64 table 5000
 #
 source /etc/network/interfaces.d/*
 #

src/sonic-config-engine/tests/sample_output/py3/mvrf_interfaces

@@ -34,14 +34,14 @@ iface eth0 inet static
     up ip -4 route add default via 10.0.0.1 dev eth0 table 5000 metric 201
     up ip -4 route add 10.0.0.0/24 dev eth0 table 5000
     up ip -4 rule add pref 32765 from 10.0.0.100/32 table 5000
-    up ip rule add pref 32764 to 11.11.11.11 table 5000
-    up ip rule add pref 32764 to 22.22.22.0/23 table 5000
+    up ip -4 rule add pref 32764 to 11.11.11.11 table 5000
+    up ip -4 rule add pref 32764 to 22.22.22.0/23 table 5000
     # management port down rules
     pre-down ip -4 route delete default via 10.0.0.1 dev eth0 table 5000
     pre-down ip -4 route delete 10.0.0.0/24 dev eth0 table 5000
     pre-down ip -4 rule delete pref 32765 from 10.0.0.100/32 table 5000
-    pre-down ip rule delete pref 32764 to 11.11.11.11 table 5000
-    pre-down ip rule delete pref 32764 to 22.22.22.0/23 table 5000
+    pre-down ip -4 rule delete pref 32764 to 11.11.11.11 table 5000
+    pre-down ip -4 rule delete pref 32764 to 22.22.22.0/23 table 5000
 iface eth0 inet6 static
     address 2603:10e2:0:2902::8
     netmask 64
@@ -53,10 +53,12 @@ iface eth0 inet6 static
     up ip -6 route add default via 2603:10e2:0:2902::1 dev eth0 table 5000 metric 201
     up ip -6 route add 2603:10e2:0:2902::/64 dev eth0 table 5000
     up ip -6 rule add pref 32765 from 2603:10e2:0:2902::8/128 table 5000
+    up ip -6 rule add pref 32764 to 33:33:33::0/64 table 5000
     # management port down rules
     pre-down ip -6 route delete default via 2603:10e2:0:2902::1 dev eth0 table 5000
     pre-down ip -6 route delete 2603:10e2:0:2902::/64 dev eth0 table 5000
     pre-down ip -6 rule delete pref 32765 from 2603:10e2:0:2902::8/128 table 5000
+    pre-down ip -6 rule delete pref 32764 to 33:33:33::0/64 table 5000
 #
 source /etc/network/interfaces.d/*
 #

src/sonic-config-engine/tests/t0-sample-graph-mvrf.xml

@@ -787,7 +787,7 @@
           <a:DeviceProperty>
             <a:Name>ForcedMgmtRoutes</a:Name>
             <a:Reference i:nil="true"/>
-            <a:Value>11.11.11.11;22.22.22.0/23</a:Value>
+            <a:Value>11.11.11.11;22.22.22.0/23;33:33:33::0/64</a:Value>
           </a:DeviceProperty>
           <a:DeviceProperty>
             <a:Name>ErspanDestinationIpv4</a:Name>