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- Number: F2TH072790U209
- Subject: Multi-protocol Ethernet Environments
- Date: August 21, 1990
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-
- GENERAL
- INFORMATION: In multi-protocol Ethernet environments,wehave often come
- across instances of servers crashing or hanging. This appears
- to be caused by various rouge packets being sucked in by the
- servers, causing them to go into Kamikaze mode. We have found
- two causes of these events: 1) Various TCP and XNS packets
- from other systems on the same backbone, and 2) occasionally
- the presence of 3C503 cards in workstations.
-
- There are two solutions for the first cause. Some LAN drivers
- are better at rejecting bad packets than others, but its not
- really known which ones are the best. We have seen the
- problem fixed by replacing NP600s by NE2000s, for example.
-
- The second solution is to ECONFIG all server and bridge
- drivers on the backbone side to run on Ethernet II. The
- drivers then reject all packets without the correct type
- number for NetWare. According to one university, this also
- tends to speed up server performance, because it spends less
- time trying to find out if any given packet is meant for it,
- or not. The July 1990 NetWare Technical Journal has some
- useful background reading related to this.
-
- If the customer has the 3C503 cards, we have seen that using
- the ODI workstation drivers shipped with v3.1 helps solve the
- problems on the backbone, even with an all-NetWare 286 site.
-
- (X) This information was verified in the lab.
-
-