fix(vlans): robust bridge-IP removal; record cutover + gotchas

RouterOS 'find ... address=<prefix>' never matches an ip/address value, so the
legacy-bridge-IP removal is now a :foreach get-and-compare. Refresh the committed
export.rsc to the post-cutover config (flat VLAN 30 + isolated mgmt VLAN 99 on
ether8, vlan-filtering on). Spec updated with execution notes (NM autoconnect flap,
the find-address quirk, and the commit-confirmed detached-flip technique used).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

backups/crs310-maker/export.rsc

@@ -1,26 +1,30 @@
-# 2025-09-11 09:49:07 by RouterOS 7.19.6
+# 2025-09-11 10:03:39 by RouterOS 7.19.6
 # software id = 73S3-5F2W
 #
 # model = CRS310-8G+2S+
 # serial number = HM40B8TDNDD
 /interface bridge
-add admin-mac=D0:EA:11:24:F4:AA auto-mac=no comment=defconf name=bridge
+add admin-mac=D0:EA:11:24:F4:AA auto-mac=no comment=defconf name=bridge \
+    vlan-filtering=yes
+/interface vlan
+add interface=bridge name=vlan-mgmt vlan-id=99
 /interface bridge port
-add bridge=bridge comment=defconf interface=ether1
+add bridge=bridge comment=defconf interface=ether1 pvid=30
-add bridge=bridge comment=defconf interface=ether2
+add bridge=bridge comment=defconf interface=ether2 pvid=30
-add bridge=bridge comment=defconf interface=ether3
+add bridge=bridge comment=defconf interface=ether3 pvid=30
-add bridge=bridge comment=defconf interface=ether4
+add bridge=bridge comment=defconf interface=ether4 pvid=30
-add bridge=bridge comment=defconf interface=ether5
+add bridge=bridge comment=defconf interface=ether5 pvid=30
-add bridge=bridge comment=defconf interface=ether6
+add bridge=bridge comment=defconf interface=ether6 pvid=30
-add bridge=bridge comment=defconf interface=ether7
+add bridge=bridge comment=defconf interface=ether7 pvid=30
-add bridge=bridge comment=defconf interface=ether8
+add bridge=bridge comment=defconf interface=ether8 pvid=99
-add bridge=bridge comment=defconf interface=sfp-sfpplus1
+add bridge=bridge comment=defconf interface=sfp-sfpplus1 pvid=30
-add bridge=bridge comment=defconf interface=sfp-sfpplus2
+add bridge=bridge comment=defconf interface=sfp-sfpplus2 pvid=30
+/interface bridge vlan
+add bridge=bridge untagged="ether1,ether2,ether3,ether4,ether5,ether6,ether7,s\
+    fp-sfpplus1,sfp-sfpplus2" vlan-ids=30
+add bridge=bridge tagged=bridge untagged=ether8 vlan-ids=99
 /ip address
-add address=192.168.88.1/24 comment=defconf interface=bridge network=\
+add address=192.168.88.1/24 interface=vlan-mgmt network=192.168.88.0
-    192.168.88.0
-/ip dns
-set servers=10.0.99.1
 /ip service
 set ftp disabled=yes
 set telnet disabled=yes
@@ -29,7 +33,5 @@ set api disabled=yes
 set api-ssl disabled=yes
 /system identity
 set name=crs310-maker
-/system ntp client
-set enabled=yes
 /system ntp client servers
 add address=10.0.99.1

docs/superpowers/specs/2026-06-09-crs310-flat-mgmtvlan-design.md

@@ -91,6 +91,25 @@ all-access topology (DATA untagged = data ports, CPU tagged only on MGMT).
 - **Removing the legacy bridge IP** is the delicate step — done while the new
   `vlan-mgmt` IP is the same address, before filtering, with the connection watched.
 
+## Execution notes (applied 2026-06-09)
+
+Cutover completed; switch is VLAN-filtered with isolated mgmt reachable on `ether8`.
+`play_switch.yml` runs idempotently over the new mgmt path. Two gotchas surfaced:
+
+- **NetworkManager autoconnect flap:** moving mamba's cable bounced the link; NM
+  re-selected the DHCP profile and dropped the static mgmt IP. Fixed by making
+  `crs310-bench` (192.168.88.2) sticky (`autoconnect yes`, priority 10) and turning
+  `autoconnect off` on `Wired connection 1`.
+- **RouterOS `find ... address=<prefix>` never matches** an `/ip/address` value (returns
+  0 even on an exact string). The first flip therefore failed to remove the defconf IP
+  off `bridge`, duplicating `192.168.88.1` onto `vlan-mgmt` and breaking ARP. Fix: remove
+  by `[find interface=bridge]`, or match via `:foreach`+`/ip/address/get $a address`.
+- **The flip was run as a detached, self-reverting on-device job** (`:execute { … :delay
+  240s; :if ($mgmtok=false) do={ revert } }`) — a commit-confirmed pattern. The first
+  (failed) attempt auto-healed at the timer; the corrected attempt was confirmed by
+  setting `:global mgmtok true` within the window. Recommended for any future
+  `vlan-filtering`/mgmt-IP change made over the network.
+
 ## Out of scope
 
 Real inter-VLAN segmentation, the SFP+ 10G uplink/trunk, and any upstream router VLAN

roles/makerfloss.mikrotik_switch/tasks/vlans.yml

@@ -82,13 +82,14 @@
 # detached flip (see the design doc's runbook), not by a straight play run. In steady
 # state both tasks below are no-ops.
 - name: Remove the legacy management IP from the bare bridge interface
+  # NOTE: RouterOS `find ... address=<v>` does NOT match an ip/address prefix value
+  # (it returns 0 even on an exact string), so match by get-and-compare instead.
   community.routeros.command:
     commands:
       - >-
-        :if ([:len [/ip/address/find interface="{{ switch_bridge_name }}"
+        :foreach a in=[/ip/address/find interface="{{ switch_bridge_name }}"]
-        address="{{ switch_mgmt_address }}"]] > 0)
+        do={ :if ([/ip/address/get $a address]="{{ switch_mgmt_address }}")
-        do={ /ip/address/remove [find interface="{{ switch_bridge_name }}"
+        do={ /ip/address/remove $a } }
-        address="{{ switch_mgmt_address }}"] }
   changed_when: false
 
 - name: Assign the management IP address to vlan-mgmt