feat: Handle multiple network leaf pairs in vlan_group naming convention

python/ironic-understack/ironic_understack/tests/test_vlan_group_name_convention.py

@@ -44,7 +44,7 @@ def test_vlan_group_name_single_cab():
     }
 
 
-def test_vlan_group_name_pair_cab():
+def test_vlan_group_name_pair_cab_dash_one():
     assert vlan_group_names(
         [
             port("a1-1-1.abc1"),
@@ -61,6 +61,23 @@ def test_vlan_group_name_pair_cab():
     }
 
 
+def test_vlan_group_name_pair_cab_dash_two():
+    assert vlan_group_names(
+        [
+            port("a1-1-2.abc1"),
+            port("a1-2-2.abc1"),
+            port("a1-1-1f.abc1"),
+            port("a1-2-1f.abc1"),
+        ],
+        mapping,
+    ) == {
+        "a1-1-2.abc1": "a1-1-2/a1-2-2-network",
+        "a1-2-2.abc1": "a1-1-2/a1-2-2-network",
+        "a1-1-1f.abc1": "a1-1/a1-2-storage",
+        "a1-2-1f.abc1": "a1-1/a1-2-storage",
+    }
+
+
 def test_vlan_group_name_with_domain():
     assert vlan_group_names(
         [

python/ironic-understack/ironic_understack/vlan_group_name_convention.py

@@ -30,6 +30,10 @@ def vlan_group_names(
     racks separated by a slash:
 
     ["a11-12-1", "a11-13-1"] => "a11-12/a11-13-network"
+
+    In a pair of racks using -2 switches, we add a -2 to the cabinet name:
+
+    ["a11-12-2", "a11-13-2"] => "a11-12-2/a11-13-2-network"
     """
     assert_consistent_data_center(ports)
     assert_single_or_paired_racks(ports)
@@ -42,9 +46,19 @@ def vlan_group_names(
     vlan_group_names = {}
     for switch_category, ports_in_group in vlan_groups.items():
         rack_names = {p.rack_name for p in ports_in_group}
+        switch_suffixes = {p.switch_suffix for p in ports_in_group}
+
+        # Special case naming for pairs of racks that have multiple leaf pairs.
+        # (We don't handle multiple pairs in a single rack.)
+        if switch_suffixes in [{"2"}, {"3"}, {"4"}, {"5"}, {"6"}]:
+            suffix = next(iter(switch_suffixes))
+            rack_names = {f"{rack_name}-{suffix}" for rack_name in rack_names}
+
         vlan_group_name = "/".join(sorted(rack_names)) + "-" + switch_category
+
         for p in ports_in_group:
             vlan_group_names[p.switch_system_name] = vlan_group_name
+
     return vlan_group_names