From: Tasuka Amano Hsu (tasuka@mac.com)
Date: Tue Jun 21 2005 - 14:32:04 GMT-3
Hi,
We have 2 problems inside our network, we found some sessions will
be randomly disconnected. the session is connected to SQL server via
ODBC from Windows 2000, and connect forever without disconnected when
session established. But in a random time pass, sessions will be
disconnected and loss some packets ( 5 to 10 packets ) when test via
ICMP ping. The server is across a layer 3 IP network exchange ospf
routing in a single area 0.
In my guess, when the TCP session connect a long time without data,
does the layer 3 switch / router will has a aging time up and purge
the ARP table to make the session disconnected because when data was
ready to send but the session is not start established and hope to
directly to send ( the application think the session still
connected ), int that time, the switch already purge ARP table
because aging time out ? so when the user restart establish the
session or use ping and every thing is worked ? because the session
be established so client re-check the routing table and the switch re-
learn the ARP so the data will be send and received, but if long
enough the aging time out, ARP table purge then will need to re-
established session ?
I hope your guy has experience this kind of problem before and know
how to resolved it.
Sincerely,
Tasuka
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