From: Church, Chuck (cchurch@netcogov.com)
Date: Wed Aug 10 2005 - 12:50:15 GMT-3
Tom,
I'm not sure if all 6500s sups have the calendar, but I know for
sure that the Sup720 with MSFC3 and the Sup2 with MSFC2 have
calendar/hardware clock. Any router that has a hardware clock will keep
the current time, even after a reload. But like any other hardware
clock, like on a PC or a watch, it'll drift a second every day, and
eventually be off. Using NTP to update the hardware calendar will make
sure that the hardware clock is always accurate to a few milliseconds.
So defining a couple reliable NTP servers for a 6500, and updating the
calendar via NTP is probably your best bet.
Chuck Church
Lead Design Engineer
CCIE #8776, MCNE, MCSE
Netco Government Services - Design & Implementation Team
1210 N. Parker Rd.
Greenville, SC 29609
Home office: 864-335-9473
Cell: 864-266-3978
cchurch@netcogov.com
PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4371A48D
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Tom Young
Sent: Wednesday, August 10, 2005 6:41 AM
To: ccielab@groupstudy.com
Subject: cat6500's hardware clock
Hi, group
I had been heard the catalyst6000 hasn't hardware
clock, if you set the clock and power off/on the switch ,
the system time will be reset.
But I found the ntp update-calendar command on the
switch, from CCO, it said MSFC will update the hardware
calendar with the NTP time.
I confused. what the function of that command ?
Dose the cat6500 keeps hardware clock ?
thanks alot
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