config: support link-local IPv6 on VLAN subinterfaces#4644
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Route dotted Ethernet and PortChannel subinterface names to VLAN_SUB_INTERFACE for use-link-local-only enable and disable commands. Include VLAN subinterfaces in show ipv6 link-local-mode and add CLI unit coverage. Signed-off-by: Sudharsan Rajagopalan <sudharr@cisco.com>
Refactor IPv6 link-local interface validation to use the common interface-table classifier. This allows short VLAN subinterface names such as Eth36.10 and Po0001.10 while preserving rejection of unsupported prefixes. Signed-off-by: Sudharsan Rajagopalan <sudharr@cisco.com>
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Summary
Add CLI support for IPv6 link-local-only mode on VLAN subinterfaces, including canonical and short subinterface names.
Why
The configuration and show commands should expose the same link-local-only behavior for VLAN subinterfaces that operators use on routed interfaces. The CLI also needs to validate subinterface names consistently across long and short forms.
Changes
config interface ipv6handling for VLAN subinterfaces.show ipv6 interfaces.Related
Validation
git diff --check upstream/master..HEADPYTHONPYCACHEPREFIX=/private/tmp/codex-pycache-sonic-utils python3 -m py_compile config/main.py show/main.py tests/ipv6_link_local_test.py