6.2 Legacy Decommissioning

6.2.1 Hardware Retirement Schedule

Category	Model	Quantity	Retirement Phase	Disposal
Core Switches	Catalyst 6500	8	Phase 3	E-waste vendor
Core Switches	Catalyst 6800	10	Phase 3	E-waste vendor
Distribution	Catalyst 4500	24	Phase 3-4	E-waste vendor
Access Switches	Catalyst 3750	120	Phase 3-4	Resale/E-waste
Access Switches	Catalyst 3850	60	Phase 4	Resale/E-waste
Wireless Controllers	WLC 5520	6	Phase 3-4	E-waste vendor
Wireless Controllers	WLC 8540	6	Phase 3-4	E-waste vendor
Access Points	Various legacy	400	Phase 3-4	E-waste vendor
Firewalls	ASA 5500-X	18	Phase 5	Trade-in

6.2.2 Legacy License Termination

License Type	Current Count	Annual Cost	Termination Date	Savings
SmartNet (Cat 6500)	18	$X,XXX	End of Phase 3	$X,XXX/yr
SmartNet (Cat 3750)	120	$X,XXX	End of Phase 4	$X,XXX/yr
SmartNet (Cat 3850)	60	$X,XXX	End of Phase 4	$X,XXX/yr
WLC Support	12	$X,XXX	End of Phase 4	$X,XXX/yr
Prime Infrastructure	1	$X,XXX	End of Phase 5	$X,XXX/yr
Total Annual		$X,XXX		$X,XXX

6.2.3 Data Migration Requirements

Data Type	Source	Destination	Migration Method
Device inventory	Spreadsheet/Prime	DNAC	Auto-discovery
Network diagrams	Visio	DNAC hierarchy	Manual creation
IP address allocation	IPAM	DNAC IP pools	API import
VLAN database	Switch configs	VN mapping	Manual mapping
ACLs	Switch configs	SGACLs	Policy translation
User database	AD/LDAP	ISE (linked)	AD integration
MAC addresses	Switch tables	ISE profiling	Auto-profiling

6.2.4 Parallel Operation Period

+------------------------------------------------------------------+
|                    PARALLEL OPERATION SCHEDULE                    |
+------------------------------------------------------------------+

        Legacy           |        SD-Access
        Operating        |        Operating
-----------------------||-----------------------
                        ||
  Phase 1-2             ||  Foundation + Pilot
  Full Legacy           ||  Limited SD-Access
  Operation             ||  (Pilot only)
                        ||
-----------------------||-----------------------
                        ||
  Phase 3               ||  Hub Sites Migration
  Legacy (non-migrated) ||  SD-Access (migrated)
  Co-exists             ||  Growing
                        ||
-----------------------||-----------------------
                        ||
  Phase 4               ||  Branch Migration
  Legacy (branches)     ||  SD-Access (hubs)
  Shrinking             ||  Expanding
                        ||
-----------------------||-----------------------
                        ||
  Phase 5               ||  Full SD-Access
  Legacy                ||  Complete
  Decommissioned        ||  Operations
                        ||
+------------------------------------------------------------------+

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