

ISR4351-SEC/K9 is the Cisco ISR 4351 security bundle identified in the official ordering row as including the SEC license. It is different from the UC and VSEC bundles that also name voice-related components. Keep the complete SEC PID in the procurement record and do not assume a PVDM voice module is included from the broader ISR family description.
Cisco lists a base performance level of 200 Mbps for ISR4351 and a separate FL-4350-PERF-K9 performance license that raises the level to 400 Mbps. The SEC bundle identity does not establish that this performance upgrade is installed. Confirm the effective license state and the intended traffic profile on the supplied router.
The current Cisco ISR 4000 lifecycle notice lists 17.9.x and 17.12.x as the final supported IOS XE release trains for these platforms, and excludes 17.10.x and 17.11.x. It gives November 30, 2028 as the last support date. Record the chosen release branch and applicable entitlement instead of treating a later version number as automatically supported.
Cisco maps ISR4351-SEC/K9 to C8300-2N2S-6T in the notice. That identifies a manufacturer migration direction, not a guarantee that existing modules, configurations or licenses transfer unchanged. Compare the deployed interfaces and services before defining a replacement order.
| Item | Official fact and boundary |
|---|---|
| Exact order | ISR4351-SEC/K9 |
| Bundle identity | ISR4351 with SEC license |
| Base performance | 200 Mbps |
| Separate performance upgrade | FL-4350-PERF-K9: 400 Mbps |
| Final supported trains | IOS XE 17.9.x and 17.12.x |
| Last support | November 30, 2028 |
| Cisco migration row | C8300-2N2S-6T |
Product Quotation | ![]() | Condition and Packaging | |
![]() | Technical Support Enquiry | Returns and Replacement | |
Shipping Arrangements | ![]() | Warranty Terms |
Cisco ISR4351-SEC/K9 3GE,3NIM,2SM,4G FLASH,4G DRAM,Security Bundle is a CISCO Router ISR 4000 product supplied by YYST Global for enterprise IT procurement and infrastructure projects.
Contact YYST Global to confirm availability for ISR4351-SEC/K9, the required quantity, exact configuration, delivery destination and current lead time before ordering. A product listing does not confirm current inventory.
The current reference price for ISR4351-SEC/K9 is US$ 2,088.00. Final pricing can change based on stock, quantity, configuration and delivery destination.
Confirm the exact model suffix, interfaces, power option, software or licenses, included accessories, new factory sealed, warranty and destination requirements before ordering ISR4351-SEC/K9.
Related products

ISR4351-AX/K9 is the Cisco ISR 4351 Application Experience Bundle order. Confirm the exact bundle entitlements, installed modules and lifecycle support before purchase.

ISR4351-V/K9 is the Cisco ISR 4351 Unified Communications bundle. Confirm exact chassis inventory, bundle entitlement, software eligibility and lifecycle support before purchase.

ISR4351-AXV/K9 is a Cisco ISR 4351 AXV bundle with Application, Security and Unified Communications licenses and a PVDM4-64 voice DSP module. The bundle is distinct from the AX package because AXV adds UC licensing and voice DSP hardware.

ISR4351-VSEC/K9 is a Cisco ISR 4351 bundle with Unified Communications and Security licenses plus a PVDM4-64 voice DSP module. It combines voice and security bundle entitlements with the 2RU ISR 4351 hardware platform; installed licenses and DSP inventory should be verified from the device and sales order.

ISR4351-DNA is the Cisco ISR 4351 hardware configuration with DNA subscription ordering. Cisco identifies the platform with three onboard Gigabit Ethernet interfaces, three NIM slots, two SM-X slots, 4 GB flash, 4 GB DRAM and IP Base software. Subscription term and entitlement must be confirmed separately on the quote.

ISR4351/K9 is a 2RU Cisco 4000 Series Integrated Services Router with three onboard Gigabit Ethernet interfaces, three NIM slots, two SM-X slots and one ISC slot. Its 200 Mbps base aggregate throughput can be raised to 400 Mbps with the FL-4350-PERF-K9 performance license.

ISR4321-SEC/K9 is Cisco's ISR 4321 security bundle with a SEC license. It has two onboard Gigabit Ethernet interfaces and two NIM slots, while the 50 Mbps default aggregate tier and optional 100 Mbps performance tier are separate licensing considerations.

ISR4331/K9 is the Cisco ISR 4331 Base Hardware Order with three onboard Gigabit Ethernet interfaces, two NIM slots, one ISC slot and one service-module slot. Verify exact modules, licenses and lifecycle eligibility before purchase.