--- In "denimskater" <> wrote:
>
> I have experienced this on the TS-7500; I have some evidence that it is
> related to the TS-7500 errata on Ethernet connectivity drops. Especially if
> you have an older board, this happens all the time. To ameliorate:
> * Make sure it's not connected to a managed switch, or that if it is Spanning
> Tree is turned off on the switch
> * If you need Spanning Tree, hopefully it has a Fast Link option to skip some
> of the ST delay when a link comes back up.
> * Static ARP entries also speed things up a tiny bit on reconnect.
> * If you have an older board, the errata has a fix that greatly reduces the
> time the link stays down. It's just a jumper between two of the pins on the
> Ethernet connector (not any of the pins that actually go to the cable -
> 10-pin connector, only 8 go to the cable of course).
>
> --Drew Van Zandt
>
Thank Drew - this is the one reply that is giving me most pause for thought. I
have a mix of TS7550, having bough about 800 so far. from the very earliest to
the most recent.
This goes against couple of things. If one session locks up, how come another
session seems to be fine?
Would you expect a ping from my workstation to the TS7550 to work whilst my
telnet session is locked? I haven't tried it yet but I will)
I was also suspicious of the SBUS locking code; not for any good reason, just
because it seems a potential weak spot. Any my application does use the SBUS to
operate the red and green LEDs, and there is often a fair amount of serial IO
going, but very little filesystem activity.
On an uptime of 23 days (to grab the nearest board at random:
105 ? S 1:11 xuartctl --server --irq 29
109 ? S 454:58 nandctl -X -z 131072 --nbdserver
lun0:disc,lun0:part1,lun0:part2,lun0:part3,lun0:part4
So that's quite a lot of CPU time on filesystem activity.
Martin.
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