Ascend Archive
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Re: (ASCEND) Feature Requests and Ascend? (Immediate Modem)
At 07:07 PM 10/9/97 -0600, Marc Slemko wrote:
>On Thu, 9 Oct 1997, Tim Basher wrote:
>
>> I just tried to reproduce your problem here and I was not [fully] able to.
>> I was not able to bring the MAX to its knees or completely destroy
performance.
>> I was able to produce a measurable change in latency. It might or might
not
>> be noticeable to a remote user. I did not measure throughput.
>
>for h in `jot 60 1 60`; do (nc host 5000 &); done
>
>across ethernet:
>
>64 bytes from xxx: icmp_seq=5 ttl=255 time=1044.850 ms
>64 bytes from xxx: icmp_seq=6 ttl=255 time=995.315 ms
>64 bytes from xxx: icmp_seq=7 ttl=255 time=727.330 ms
>64 bytes from xxx: icmp_seq=8 ttl=255 time=735.823 ms
>64 bytes from xxx: icmp_seq=9 ttl=255 time=1037.498 ms
>
>Try a few more (ie. 80) and:
>
>45 packets transmitted, 33 packets received, 26% packet loss
>round-trip min/avg/max = 252.679/21128.747/39426.912 ms
>
>In the above example, it just stops responding to pings or nearly
>any other traffic (if I am telnetted to a termserv prompt it takes
>~30-60 seconds to echo a keystroke) until the connections are
>closed. It normally comes back when the sessions are disconnected.
>Sessions over WAN links are brought to an almost complete standstill.
You still didn't say what software release you are on. Recent releases have
optimized the Immediate Modem feature.
Matt Holdrege - http://www.ascend.com - matt@ascend.com
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