Halo para Suhu,

Saya mencoba memonitor availability router cisco di network kami berdasarkan downtime yang terjadi. Saya asumsikan dari print out "show version", waktu yang ditunjukkan di baris "System returned to ROM" adalah waktu ketika router mulai down, dan waktu di baris berikutnya "System restarted at" adalah waktu ketika router kembali online.
Yang membingungkan adalah di routerA waktu di barus "System returned to ROM" muncul sedangkan di routerB tidak muncul.

Apakah ada yg bisa mencerahkan perbedaannya? Dan bagaimana caranya agar routerB memunculkan waktu mulai reload di kemudian hari sebagai hasil print out command "show version"?

Terima kasih

Hadit

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RouterA#show version
Cisco IOS Software, s72033_rp Software (s72033_rp-ITPK9V-M), Version 12.2(33)IRI, RELEASE SOFTWARE (fc1)
Technical Support: http: [pranala luar disembunyikan, sila masuk atau daftar.]. com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Fri 04-May-12 14:04 by prod_rel_team

ROM: System Bootstrap, Version 12.2(17r)S4, RELEASE SOFTWARE (fc1)

RouterA uptime is 4 years, 11 weeks, 5 days, 17 hours, 27 minutes
Uptime for this control processor is 4 years, 11 weeks, 5 days, 17 hours, 19 minutes
System returned to ROM by reload at 00:01:24 JAVT Thu Oct 11 2012 (SP by reload)
System restarted at 00:05:58 JAVT Thu Oct 11 2012
System image file is "bootdisk:s72033-itpk9v-mz.122-33.IRI.bin"
Last reload type: Normal Reload


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RouterB#show version
Cisco IOS Software, s72033_rp Software (s72033_rp-ITPK9V-M), Version 12.2(33)IRI, RELEASE SOFTWARE (fc1)
Technical Support: http: [pranala luar disembunyikan, sila masuk atau daftar.]. com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Fri 04-May-12 14:04 by prod_rel_team

ROM: System Bootstrap, Version 12.2(17r)S4, RELEASE SOFTWARE (fc1)

RouterB uptime is 4 years, 11 weeks, 6 days, 16 hours, 29 minutes
Uptime for this control processor is 4 years, 11 weeks, 6 days, 16 hours, 25 minutes
System returned to ROM by reload (SP by reload)
System restarted at 01:04:31 JAVT Wed Oct 10 2012
System image file is "bootdisk:s72033-itpk9v-mz.122-33.IRI.bin"
Last reload type: Normal Reload