Commit 9c1c96b37e for frr

commit 9c1c96b37e4e69c4f8e15d86edb8e961a13f4783
Author: Donald Sharp <sharpd@nvidia.com>
Date:   Fri Oct 2 13:18:35 2026 -0400

    tests: Add freebsd side of shutdown_bringup_interface_in_kernel

    Add a freebsd side to the shutdown_bringup_interface_in_kernel
    so that we can use this everywhere.

    Signed-off-by: Donald Sharp <sharpd@nvidia.com>

diff --git a/tests/topotests/lib/common_config.py b/tests/topotests/lib/common_config.py
index b6b3b20cce..8fd7f02bee 100644
--- a/tests/topotests/lib/common_config.py
+++ b/tests/topotests/lib/common_config.py
@@ -1814,18 +1814,25 @@ def delete_address_on_interface_freebsd(

 def shutdown_bringup_interface_in_kernel(tgen, dut, intf_name, ifaceaction=False):
     """
-    Cretae interfaces in kernel for ipv4/ipv6
-    Config is done in Linux Kernel:
+    Shut down or bring up a kernel interface.

     Parameters
     ----------
     * `tgen` : Topogen object
-    * `dut` : Device for which interfaces to be added
+    * `dut` : Device whose interface changes state
     * `intf_name` : interface name
-    * `ifaceaction` : False to shutdown and True to bringup the
-                      ineterface
+    * `ifaceaction` : False to shut the interface down, True to bring it up
     """

+    if sys.platform.startswith("freebsd"):
+        shutdown_bringup_interface_in_kernel_freebsd(tgen, dut, intf_name, ifaceaction)
+    else:
+        shutdown_bringup_interface_in_kernel_linux(tgen, dut, intf_name, ifaceaction)
+
+
+def shutdown_bringup_interface_in_kernel_linux(tgen, dut, intf_name, ifaceaction=False):
+    """Set a Linux interface administratively up or down."""
+
     rnode = tgen.gears[dut]

     cmd = "ip link set dev"
@@ -1840,6 +1847,16 @@ def shutdown_bringup_interface_in_kernel(tgen, dut, intf_name, ifaceaction=False
     rnode.run(cmd)


+def shutdown_bringup_interface_in_kernel_freebsd(
+    tgen, dut, intf_name, ifaceaction=False
+):
+    """Set a FreeBSD interface administratively up or down."""
+
+    rnode = tgen.gears[dut]
+    action = "up" if ifaceaction else "down"
+    _freebsd_run(rnode, dut, ["/sbin/ifconfig", intf_name, action])
+
+
 def validate_ip_address(ip_address):
     """
     Validates the type of ip address