feat: flip swap mechanism — MD as primary, RST as override (Phase 1)

This is the first of three phases inverting the per-page swap mechanism
so MD becomes the canonical primary and RST becomes the rare override.

Phase 1 — file renames + conf.py exclude_patterns flip only:
- Rename docs/**/md-<stem>.md to docs/**/<stem>.md (drop md- prefix)
  for all 254 stems previously listed in docs/_swap.txt
- Rename docs/**/<stem>.rst to docs/**/rst-<stem>.rst (add rst- prefix)
  for the same 254 stems
- Repurpose docs/_swap.txt as docs/_rst_overrides.txt; initially empty
  comment-only since no pages need the RST fallback right now
- conf.py exclude_patterns flipped: rst-*.rst is now excluded by default
  instead of md-*.md
- conf.py runtime-artifact references updated to _rst_override_state.json
  and _md_exclude.txt (Phase 2 will rewrite swap_sources.py to produce
  these names; for now no swap script runs because overrides list is empty)

Phase 2 (next commit on this branch) will rewrite scripts/swap_sources.py
with inverted rename direction, delete scripts/import_myst.py + tests, and
update tests/test_swap_sources.py for the new semantics.

Phase 3 will be the cleanup pass and ready-for-review flip.

Generated by robots https://vyos.io

1 files changed, 72 insertions, 0 deletions

diff --git a/docs/configuration/protocols/arp.md b/docs/configuration/protocols/arp.md
new file mode 100644
index 00000000..7d9bf4f9
--- /dev/null
+++ b/docs/configuration/protocols/arp.md
@@ -0,0 +1,72 @@
+```{eval-rst}
+.. meta::
+   :description: The Address Resolution Protocol (ARP) resolves
+                 network-layer addresses to link-layer MAC addresses.
+   :keywords: arp, network, protocol, mac, address, ipv4, static
+```
+
+(routing_static_arp)=
+
+# ARP
+
+The {abbr}`ARP (Address Resolution Protocol)` resolves IPv4 network layer addresses
+to link layer MAC addresses.
+addresses. This mapping is essential for communication within the Internet
+Protocol suite. ARP was standardized in 1982 by {rfc}`826` (STD 37).
+
+:::{note}
+In Internet Protocol version 6 (IPv6) networks, address resolution is
+performed by the Neighbor Discovery Protocol (NDP).
+:::
+
+Use the following commands to configure or view ARP table entries.
+
+## Configuration
+
+```{eval-rst}
+.. cfgcmd:: set protocols static arp interface <interface> address <host> mac <mac>
+
+   **Configure a static ARP entry on the specified interface.**
+
+   This creates a permanent mapping between an IP address and a MAC address
+   on the specified interface.
+
+   Example:
+
+   .. code-block:: none
+
+      set protocols static arp interface eth0 address 192.0.2.1 mac 01:23:45:67:89:01
+```
+
+## Operation
+
+```{eval-rst}
+.. opcmd:: show protocols static arp
+
+   Show all ARP table entries across all interfaces.
+
+   .. code-block:: none
+
+      vyos@vyos:~$ show protocols static arp
+      Address                  HWtype  HWaddress           Flags Mask     Iface
+      10.1.1.1                 ether   00:53:00:de:23:2e   C              eth1
+      10.1.1.100               ether   00:53:00:de:23:aa   CM             eth1
+```
+
+```{eval-rst}
+.. opcmd:: show protocols static arp interface <interface>
+
+   Show all ARP table entries for the specific interface.
+
+   Example for ``eth1``:
+
+   .. code-block:: none
+
+      vyos@vyos:~$ show protocols static arp interface eth1
+      Address                  HWtype  HWaddress           Flags Mask     Iface
+      10.1.1.1                 ether   00:53:00:de:23:2e   C              eth1
+      10.1.1.100               ether   00:53:00:de:23:aa   CM             eth1
+```
+
+[arp]: https://en.wikipedia.org/wiki/Address_Resolution_Protocol
+