I recently bought Cisco 1921 from Ebay. I configured it and it worked for a while, but it started restarting on its own. I updated the firmware, but it continues again ...
00:00:35: %LINEPROTO-5-UPDOWN: Line protocol on Interface Embedded-Service-Engine0/0, changed state to down Error: primary instr cache, fields: , virtual addr 0x8169A30C, physical addr(21:3) 0x0040C8, vAddr(14:12) 0x1000 virtual address corresponds to main:text, cache word 1
Cache Data not Available for CPU D07
Address: 0x8169A300 not in TLB
09:11:15 UTC Tue May 23 2017: Interrupt exception, CPU signal 20, PC = 0x81014A50
ROM: System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1)
rlh uptime is 2 hours, 6 minutes System returned to ROM by processor memory parity error at PC 0x22B9421C, address 0x0 at 10:17:53 UTC Fri Feb 12 2021 System image file is "flash:c1900-universalk9-mz.SPA.158-3.M5.bin"
Cisco CISCO1921/K9 (revision 1.0) with 491520K/32768K bytes of memory.