michaele@sequent.com (Michael J. Edelman -- Network Architecture) (11/02/90)
After having collision problems for a long time we asked cisco to come out and take a look at our network and our problem. To make a [very] long story short, we found a few problems. Jumpers W94 and W193 on the MCI cards were set for Ethernet version 1, not Ethernet version 2/802.3 -- contrary to the documentation. The routers appear to be shipped configured for Ethernet version 1 although they are documented as being shipped configured for Ethernet version 2/802.3. The documentation -- "Installing the MCI card" in the cisco "Hardware Products Installation Guide", appears to have Ethernet version 1 and Ethernet version 2 swapped, so that what is documented as the jumper setting for Ethernet version 1 is Ethernet version 2, and vice versa. When we corrected the jumper settings, our collisions dropped from 3% to 5% to .3%. A dramatic improvement! Our thanks to cisco for sending the people out to help diagnose and solve the problem! Michael Edelman Sequent Computer Systems, Inc.
ROBERT@VM1.MCGILL.CA (Robert Craig) (11/03/90)
Could you give us the manual revision numbers and approximate date(s) when you took delivery of the mal-configured units? I'd like to know if I should go check the jumpers on all the MCI cards in all our campus and regional network routers... It would also be nice to know the "correct" settings for Type II/802.3. Robert Craig domain: robert@vm1.mcgill.ca Senior Network Analyst bitnet: robert@mcgill1 McGill University Computing Centre Tel: (514) 398-3710 805 Sherbrooke St. W. FAX: (514) 398-6876 Montreal, Quebec H3A 2K6 CORISQ: (514) 398-RISQ
haas%basset.utah.edu@cs.utah.edu (Walt Haas) (11/03/90)
In article <29131@boulder.Colorado.EDU> ROBERT@VM1.MCGILL.CA (Robert Craig) writes: >Could you give us the manual revision numbers and approximate >date(s) when you took delivery of the mal-configured units? I'd like to know too! -- Walt Haas haas@ski.utah.edu