Maintenance Window One-Pager

One line per check. BEFORE on the left, AFTER on the right, paired row by row. The detail lives on the Before and After pages - this sheet is the one you print.

Printable one-pager - Letter, landscape, one sheet with BEFORE and AFTER side by side. Printing this web page will not keep the layout - download the PDF and print that (95 KB).

Change control #	Date	Window (from - to)	Engineer	Route export method
				☐ 1 - all gateways ☐ 2 - per gateway

	☐ BEFORE - capture the baseline	☐ AFTER - capture again, compare
Prep	☐ Folder made: date + change #, with before and after inside	☐ Fabric settled - wait 5 min, 10-15 if tunnels not up
	☐ Critical apps listed: Voice, Video, App 1-3	☐ Critical users and testers told to start validating
	☐ Critical hubs and 2-5 critical spokes named
	☐ Users and SME testers scheduled
Orch alarms	☐ Alarms > Active exported → orch-alarms	☐ Exported, compared - unexpected alarms investigated, 1-2 people clear
Reachability	☐ "Not connected" noted; websockets verified; exported → reachability	☐ Same capture, compared to before
NMS	☐ Alarms + down devices captured → nms-alarms, nms-down-devices	☐ Any down sites, down devices, new alarms? Captured, compared
	☐ Maintenance mode SET	☐ Maintenance mode REMOVED
Tunnels	☐ Overlay exported → tunnels-report-overlay	☐ Overlay exported, compared
	☐ Underlay exported → tunnels-report-underlay	☐ Underlay exported, compared
	☐ Passthrough exported → tunnels-report-passthrough	☐ Passthrough exported, compared
		☐ Same up / down counts? Any tunnel up before, down now? Traffic on another tunnel?
Routes	☐ Method chosen; "All" selected, filters cleared; exported	☐ Same method; "All" selected, filters cleared; exported
		☐ Compared - missing routes, new routes, count delta > 5 investigated
		☐ P/B spot-checked in the UI for critical prefixes - CSV cannot see a flip (GMS-46509)
BGP	☐ Summary exported → bgp-summary-report	☐ Summary exported, compared
	☐ Peers exported → bgp-peers-report	☐ Peers exported, compared - every peer Established
OSPF	☐ Neighbor state exported / screenshot → ospf-report	☐ Same capture, compared - every neighbor up
Flows	☐ Each hub exported → hostname_flows.csv	☐ Each hub exported; bad flows reviewed, reset, route verified
	☐ Each critical spoke exported → hostname_flows.csv	☐ Each critical spoke exported, reviewed
	☐ 0-byte flow count noted, bytes IN and OUT	☐ 0-byte counts compared - difference expected?
Backup	☐ Backup Now - "Before outage (change #)"	☐ Backup Now - "After outage (change #)"; config compare if anything is off
Voice	☐ Rings both ways, heard both ways; flows saved; quality noted	☐ Re-tested; compared to before - any change?
Video	☐ Session connects, both parties seen; quality noted	☐ Re-tested; compared to before - any change?
App 1-3	☐ Full transaction; Performance + General tabs saved; perf stats saved	☐ Full transaction repeated; compared to before
	☐ Tester feedback documented	☐ Tester feedback compared - sign-off

Rule of the sheet: every ☐ on the right has a matching ☐ on the left. If the left box is empty, the right one cannot be compared - it can only be recorded.