Byte Counters on Ciscos

Dean Anderson dean at av8.com
Mon Jan 25 19:11:51 UTC 1999


Cisco stores them as 32 bits, but SNMP also retrieves them as 32 bits.  HP
has a proprietary MIB & impl. for its Lanprobes & RMON s/w for HP
workstations, which is 64 bits wide.  These are the only devices I know of
that store more than 32 bits, and have accurate counts of bytes over a long
period of time.

So on ciscos, you should clear counters before they can roll over.

You should really have a raffle to guess the uptime on your router. ;-)

		--Dean


At 10:46 AM 1/25/1999 -0500, alex at nac.net wrote:
>
>
>I am working on some byte counting stuff, and have a odd question.
>
>I noticed on my of my routers:
>
>     2403558863 packets input, 2476827328 bytes
>
>thats:
>
>     2,403,558,863 packets input, 
>     2,476,827,328 bytes
>
>
>which when divided out, comes to 1.03 bytes per packet, which without
>saying is obviously in error.
>
>So, when does a Cisco counter 'flip' ? How many bits is it?
>
>
>-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>     Atheism is a non-prophet organization. I route, therefore I am.
>       Alex Rubenstein, alex at nac.net, KC2BUO, ISP/C Charter Member
>               Father of the Network and Head Bottle-Washer
>     Net Access Corporation, 9 Mt. Pleasant Tpk., Denville, NJ 07834
> Don't choose a spineless ISP; we have more backbone!  http://www.nac.net
>-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>
>
>
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           Plain Aviation, Inc                  dean at av8.com
           LAN/WAN/UNIX/NT/TCPIP          http://www.av8.com
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