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-rwxr-xr-xsrc/conf_mode/vrf.py12
1 files changed, 12 insertions, 0 deletions
diff --git a/src/conf_mode/vrf.py b/src/conf_mode/vrf.py
index 37625142c..9b1b6355f 100755
--- a/src/conf_mode/vrf.py
+++ b/src/conf_mode/vrf.py
@@ -214,6 +214,18 @@ def apply(vrf):
# Delete the VRF Kernel interface
call(f'ip link delete dev {tmp}')
+ # Enable/Disable VRF strict mode
+ # When net.vrf.strict_mode=0 (default) it is possible to associate multiple
+ # VRF devices to the same table. Conversely, when net.vrf.strict_mode=1 a
+ # table can be associated to a single VRF device.
+ #
+ # A VRF table can be used by the VyOS CLI only once (ensured by verify()),
+ # this simply adds an additional Kernel safety net
+ strict_mode = '0'
+ # Set to 1 if any VRF is defined
+ if 'name' in vrf: strict_mode = '1'
+ sysctl_write('net.vrf.strict_mode', strict_mode)
+
if 'name' in vrf:
# Separate VRFs in conntrack table
# check if table already exists