Hello community
I have a Cisco 881 router on a remote location that I want to uprade to the latest recommended firmware. However, I don't know which firmware is supported for this router:
router#show version
Cisco IOS Software, C800 Software (C800-UNIVERSALK9-M), Version 15.4(1)T1, RELEASE SOFTWARE (fc2)C881, firmware
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Wed 12-Feb-14 06:45 by prod_rel_team
ROM: System Bootstrap, Version 15.4(1r)T, RELEASE SOFTWARE (fc1)
router uptime is 12 weeks, 3 hours, 15 minutes
System returned to ROM by power-on
System restarted at 07:24:50 GMT Wed Oct 19 2022
System image file is
flash:c800-universalk9-mz.SPA.154-1.T1.bin
Last reload type: Normal Reload
Last reload reason: power-on
Cisco C881-K9 (revision 1.0) with 988236K/60339K bytes of memory.
Processor board ID FGLxxxxxx
5 FastEthernet interfaces
1 Virtual Private Network (VPN) Module
DRAM configuration is 32 bits wide
255K bytes of non-volatile configuration memory.
250880K bytes of ATA System CompactFlash (Read/Write)
License Info:
License UDI:
-------------------------------------------------
Device# PID SN
-------------------------------------------------
*1 C881-K9 FGLxxxxxx
License Information for 'c800'
License Level: advipservices Type: Permanent
Next reboot license Level: advipservices
Configuration register is 0x2102
router#show inv
NAME: "C881-K9", DESCR: "C881-K9 chassis, Hw Serial#: FGLxxxxxxx, Hw Revision: 1.0"
PID: C881-K9 , VID: V01, SN: FGLxxxxxx
NAME: "C881 Mother board on Slot 0", DESCR: "C881 Mother board"
PID: C881-K9 , VID: V01, SN: FOCxxxxxx
The current firmware on the router has the following naming convention: c800-universalk9-mz.SPA.154-1.T1.bin
When I look up the router model on the Cisco website, I find 2 pages each containing different software version:
Cisco C881 Integrated Services Router:
Software Download - Cisco Systems
Cisco 881 Integrated Services Router:
Software Download - Cisco Systems
Both have a different naming convention compared to the current firmware.
Thank you for helping to clear this out.
