diff --git a/playbooks/files/rax-maas/plugins/bonding_iface_check.py b/playbooks/files/rax-maas/plugins/bonding_iface_check.py
index c0a44510d..f712de466 100644
--- a/playbooks/files/rax-maas/plugins/bonding_iface_check.py
+++ b/playbooks/files/rax-maas/plugins/bonding_iface_check.py
@@ -34,17 +34,19 @@ def bonding_ifaces_check(_):
         bonding_iface_check_cmd_output_lines = (
             bonding_iface_check_cmd_output.split('\n')
         )
-
-        has_slave_down = False
         slave_count = 0
         for idx, line in enumerate(bonding_iface_check_cmd_output_lines):
             if line.startswith("Slave Interface"):
                 slave_count = slave_count + 1
+
+        has_slave_down = False
+        for idx, line in enumerate(bonding_iface_check_cmd_output_lines):
+            if line.startswith("Slave Interface"):
                 slave_inface_mii_status_line = (
                     bonding_iface_check_cmd_output_lines[idx + 1]
                 )
                 slave_inface_mii_status = (
-                    slave_inface_mii_status_line.split(":")[1]
+                    slave_inface_mii_status_line.split(":")[1].strip()
                 )
                 if 'up' not in slave_inface_mii_status or slave_count < 2:
                     has_slave_down = True
diff --git a/releasenotes/notes/fix_bonding_split-6810497056a209a0.yaml b/releasenotes/notes/fix_bonding_split-6810497056a209a0.yaml
new file mode 100644
index 000000000..6f88a1fab
--- /dev/null
+++ b/releasenotes/notes/fix_bonding_split-6810497056a209a0.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Fix the bonding mii split logic to remove leading and trailing spaces and
+    calculate the slave_count outside the loop determining if a slave is down.