| Title: | FDDI - The Next Generation |
| Moderator: | NETCAD::STEFANI |
| Created: | Thu Apr 27 1989 |
| Last Modified: | Thu Jun 05 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2259 |
| Total number of notes: | 8590 |
Hallo,
my customer has tho following configuration:
He has 4 NT-Server (COMPAQ Proliant 4000) with FDDI-cards DEFEA-UB.
TCP/IP on this FDDI-lines will take about 10 times longer as on
the normal ethernet-interface.
What can it be?
Thanks
Herbert
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1935.1 | NETCAD::STEFANI | Machines to humanize | Fri Jan 26 1996 13:51 | 13 | |
>> TCP/IP on this FDDI-lines will take about 10 times longer as on
>> the normal ethernet-interface.
This hasn't been our experience here. We're able to get DEFEA's to do
40Mbps point-to-point on Alpha servers. Even on an Intel-based system,
I'm sure we'll do over 10Mbps (standard Ethernet).
Check the Windows NT Notes conference (DECWET::WINDOWS-NT) for
information on tuning the TCP/IP stack. You might need to increase the
message size to let TCP/IP know that it can send more packets to the
driver during transmit.
-Larry
| |||||
| 1935.2 | IP addressing? Stress tests? | NETCAD::ROLKE | Ice of Damoclese | Mon Jan 29 1996 15:11 | 19 |
> my customer has tho following configuration: > > > He has 4 NT-Server (COMPAQ Proliant 4000) with FDDI-cards DEFEA-UB. > > TCP/IP on this FDDI-lines will take about 10 times longer as on > the normal ethernet-interface. > What is the customer's IP configuration? It is easy enough to misconfigure IP addresses so that all your traffic goes through a router and performance drops. Make sure that the servers and clients are on the same subnet over FDDI. Also, nobody is running any wicked traffic generators over FDDI, are they? Someone else's stress test can make your FDDI connection look "bad" while your ethernet connection looks "good". Chuck | |||||