Bug: show_techsupport/test_techsupport.py::test_techsupport fails on multi-ASIC T1 KVM

[saiarcot895]

Is it platform specific

generic

Importance or Severity

Medium

Description of the bug

On multi-ASIC T1 KVM setup, show_techsupport/test_techsupport.py::test_techsupport test case fails with a CLI error when trying to create a mirror session.

Steps to Reproduce

1. Download a multi-ASIC T1 KVM image.
2. Run add-topo with that image and vms-kvm-four-asic-t1-lag topology.
3. Run the show_techsupport/test_techsupport.py test suite.

Actual Behavior and Expected Behavior

Test should pass.

Relevant log output

run module command failed, Ansible Results =>
failed = True
changed = True
rc = 2
cmd = ['config', 'mirror_session', 'add', 'test_session_1', '1.1.1.1', '10.0.0.33', '8', '1', '25944', '0']
start = 2025-12-13 20:02:29.247121
end = 2025-12-13 20:02:30.043657
delta = 0:00:00.796536
msg = non-zero return code
invocation = {'module_args': {'_raw_params': 'config mirror_session add test_session_1 1.1.1.1 10.0.0.33 8 1 25944 0', '_uses_shell': False, 'expand_argument_vars': True, 'stdin_add_newline': True, 'strip_empty_ends': True, 'argv': None, 'chdir': None, 'executable': None, 'creates': None, 'removes': None, 'stdin': None}}
_ansible_no_log = False
stdout =
stderr =
Usage: config mirror_session add [OPTIONS] <session_name> <src_ip> <dst_ip>
                                 <dscp> <ttl> [gre_type] [queue]
Try 'config mirror_session add -h' for help.

Error: Error: Port mirror direction 'both' is not supported by the ASIC

Output of show version

Attach files (if any)

No response

[stephenxs]

Thanks. Draft a PR to fix it sonic-net/sonic-utilities#4159