ISR4431-AX/K9 is Cisco's ISR 4431 Application Experience bundle with APP and Security licenses. It is not the AXV voice bundle: this PID does not identify a PVDM4 voice DSP or UC license as included.
The platform provides four onboard Gigabit Ethernet ports, three NIM slots and one ISC slot. Cisco lists 8 GB default flash, 2 GB data-plane DRAM and 4 GB control-plane DRAM. Published aggregate throughput is 500 Mbps by default and 1 Gbps with the FL-44-PERF-K9 performance license; boost is a separate entitlement.
Cisco ended sale on November 7, 2023 and lists November 30, 2028 as the last date of support. The lifecycle notice maps this PID to C8300-1N1S-4T2X or C8300-1N1S-6T migration platforms. Interfaces, modules, APP and security functions, throughput and current subscriptions must be redesigned rather than assumed equivalent.
Cisco ISR 4000 official data sheet | Cisco ISR 4000 official lifecycle notice
| Exact model / SKU | ISR4431-AX/K9 |
| Exact PID | ISR4431-AX/K9 |
| Bundle | Application Experience with APP and SEC licenses |
| Voice boundary | UC license and PVDM voice DSP are not identified by this AX PID |
| Onboard Ethernet | 4 x Gigabit Ethernet |
| Expansion | 3 NIM slots and 1 ISC slot |
| Default memory | 2 GB data-plane DRAM and 4 GB control-plane DRAM |
| Default flash | 8 GB |
| Published aggregate throughput | 500 Mbps default; 1 Gbps with FL-44-PERF-K9 |
| End of sale | November 7, 2023 |
| Last date of support | November 30, 2028; migration to supported Catalyst 8300 design |
| Source match | Exact ISR4431-AX/K9 APP/SEC bundle identity, ISR 4431 ports, expansion, memory, performance and lifecycle from official Cisco documents |
| Official manufacturer reference | Cisco ISR 4000 official lifecycle notice |
Product Quotation | ![]() | Condition and Packaging | |
![]() | Technical Support Enquiry | Returns and Replacement | |
Shipping Arrangements | ![]() | Warranty Terms |
Cisco ISR4431-AX/K9 ISR 4431 Application Experience Bundle is a CISCO Router ISR 4000 product supplied by YYST Global for enterprise IT procurement and infrastructure projects.
For ISR4431-AX/K9, the manufacturer specification lists onboard ethernet as 4 x Gigabit Ethernet.
For ISR4431-AX/K9, the manufacturer specification lists default memory as 2 GB data-plane DRAM and 4 GB control-plane DRAM.
For ISR4431-AX/K9, the manufacturer specification lists published aggregate throughput as 500 Mbps default; 1 Gbps with FL-44-PERF-K9.
Contact YYST Global to confirm availability for ISR4431-AX/K9, the required quantity, exact configuration, delivery destination and current lead time before ordering. A product listing does not confirm current inventory.
Related products

ISR4431/K9 is the Cisco ISR 4431 base router order with four onboard Gigabit Ethernet interfaces, three NIM slots and one ISC slot. Cisco ended sale on November 7, 2023; general software maintenance ended August 31, 2025. Support eligibility and installed performance licenses require verification before procurement. The manufacturer family image is representative, not a photograph of a supplied unit.

ISR4431-DNA is the Cisco ISR 4431 router order with a DNA subscription, four Gigabit interfaces and three NIM slots. Verify the quoted software tier and term; hardware support ends November 30, 2028.

ISR4431-VSEC/K9 is a Cisco ISR 4431 Voice and Security Bundle order on the ISR 4000 platform. Verify its exact license, module and lifecycle records before purchase.

ISR4431-SEC/K9 is a Cisco ISR 4431 Security Bundle order on the ISR 4000 platform. Verify its exact license, module and lifecycle records before purchase.

ISR4431-V/K9 is the Cisco ISR 4431 Unified Communications bundle. Confirm exact chassis inventory, bundle entitlement, software eligibility and lifecycle support before purchase.

ISR4461/K9 is Cisco's base ISR 4461 router with two 10-Gigabit and four Gigabit onboard interfaces, three NIM slots and three service-module slots. Its 1.5 Gbps default aggregate forwarding tier is distinct from the separately licensed 3 Gbps tier. Cisco ended sale January 20, 2025; final support is January 31, 2030 under applicable entitlement terms.

ISR4451-X-SEC/K9 is a Cisco security-bundle router with four Gigabit Ethernet interfaces and 1 Gbps default aggregate throughput. The 2 Gbps performance license is separate; review final IOS XE train and support limits before retaining this legacy platform.

ISR4461-SEC/K9 is a Cisco ISR 4461 router bundle with the SEC license, two 10-Gigabit and four Gigabit Ethernet interfaces. Cisco lists January 31, 2030 as the last support date under applicable existing entitlement terms.