Stoned_PL
join:2005-12-13
01485
| Slow Ping response on 3com 2848 (3C16486)
Hi everyone,
Some time ago I obtained that type of switch.
All the connectivity stuff is ok (cables, cross panels, all in cat. 6) but I observed one strange issue:
whenever I ping switch from any host, the reply ping varies from 10 to 20ms (By default is has 32bytes of data). I tried with maximum ping rate (The switch has threshold for ping size - 1450bytes) and it replies with 1-2ms more latency. Normally, the reply ping should vary from >1 to 2ms. Correct me if I'm wrong. Any suggestions and reply are welcomed.
regards,
Stoned. |
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rjs1003
join:2002-12-04
united kingd
| Pinging the switch itself is different to passing data through it. Passing data through is all done at wire-speed in hardware. Sending a ping normally has to go to the switch's processor and then be returned to the network. This switch is (I think?) a baseline-plus switch - ie a baseline switch with some limited web management. The thing is, these switches have very low-powered processors on them - they don't do much except occasionally serve web admin pages, so they are as low-spec as possible for cost reasons. It may even sleep most of the time to conserve power. These factors may well account for it being slow to respond to pings.
A fully-managed switch would also probably be much quicker to respond to pings than this one, because the processor on it would almost certainly be tens of times faster...
Bob |
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Stoned_PL
join:2005-12-13
01485
| hello,
Thanks for response,
I'm ok with you, this is baseline 2848-sfp switch,
it passes data through, but it dunno responds to ping fast by itself. It is good, that this switch serves quite good lan capacity, in the nearest future I will test it against high bandwidth demand.
best regards,
Stoned_PL |
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