ISR4221-AX/K9 - Cisco 4000 Family Integrated Services Router

ISR4221-AX/K9 Exact Bundle Identity

ISR4221-AX/K9 is the Cisco ISR 4221 Application Experience bundle with APP and SEC licenses. The base hardware is the ISR 4221 branch router with two onboard Gigabit Ethernet interfaces, two NIM slots, 8 GB flash and 4 GB DRAM.

Bundle and performance boundary

Licensed bundle: AX bundle: APP and SEC technology licenses; no UC voice license or voice DSP is identified for this PID. Platform performance: 35 Mbps base platform performance, upgradeable to 75 Mbps with the documented performance license. Performance-license values are platform limits, not a promise of application throughput in every configuration.

Small-branch application and security boundary

Confirm that the order is specifically for the AX bundle and not a base ISR4221/K9 or SEC-only bundle. Validate current entitlement transfer rules, required throughput, WAN module inventory and cryptography eligibility. Cisco states that ISR4221 does not support the UC voice bundle, so voice DSPs, CUBE sessions and UC licensing must not be inferred from this PID.

Lifecycle and migration

Cisco lists the ISR4221 product line as end of sale with support ending 30 November 2028. Cisco Catalyst 8200L family is the lifecycle migration reference for the base ISR4221 platform. Treat the replacement as a migration starting point: interface modules, voice resources, software features, rack power and configuration must be mapped rather than assumed compatible.

Related ISR 4000 bundle records

• ISR4351-V/K9 - compare chassis capacity, bundle entitlement and lifecycle migration.
• ISR4431-V/K9 - compare chassis capacity, bundle entitlement and lifecycle migration.
• ISR4451-X-AX/K9 - compare chassis capacity, bundle entitlement and lifecycle migration.

Official Cisco evidence: Cisco Secure Boot PID List and Cisco platform and licensing documentation.