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- From: shava@hermes.oit.unc.edu (Shava Nerad Averett)
- Newsgroups: comp.dcom.lans.ethernet
- Subject: IPX frame types and performace degradation (was Re: TCP/IP and Netware ...)
- Message-ID: <1992Sep3.220853.25800@samba.oit.unc.edu>
- Date: 3 Sep 92 22:08:53 GMT
- References: <1992Aug28.194558.4752@iplmail.orl.mmc.com> <p2hn!w#.seifert@netcom.com> <hz01930.715352014@cygnus>
- Sender: usenet@samba.oit.unc.edu
- Organization: University of North Carolina, Chapel Hill
- Lines: 38
- Nntp-Posting-Host: hermes.oit.unc.edu
-
- In article <hz01930.715352014@cygnus> hz01930@hx.deere.com (Jay D. Anderson) writes:
- >I understand from this and other posts in this thread that retransmit
- >backoffs are hardware functions. Good. When setting up the
- >parameters for NetWare, don't you have a choice of using 802.3 compliance
- >*or* Ethernet II? We are using a Vax Netware server which requires
- >Ethernet II to be the parameter setting, and we have experienced
- >difficulties with PCs using 3C503 ethernet controllers to talk TCP/IP.
- >The PCs frequently would not see reply packets, and keyboard input
- >using telnet would be "sticky," you may type for a while with nothing
- >echoing on the screen, then after a second or two, the characters would
- >appear. Additionally, we have long had a strange behavior on our Sun
- >workstations where we would get "NFS server not responding" messages
- >occasionally. Looking back at that problem, it only occurs on segments
- >of the network not protected from Netware traffic by a bridge or router.
- >We finally placed the segment with the PCs on the other side of a bridge
- >to get away from the Netware traffic with resulting perfect performance.
- >
- >Our overall network traffic is in the neighborhood of 7%. Are these
- >symptoms of using Netware with the Ethernet II setting, or would I see
- >the same thing with Netware using 802.3 compliance?
-
-
- A similar thing we run into sometimes is that if you are running Netware
- IPX on two frame types, and you have servers that bind *BOTH* Ethernet_
- 802.3 and Ethernet_II on their interfaces, then you get RIP broadcasts
- of every damn bit of IPX routing information from each server with both
- frame types duplicated for each frame type. On a large internetwork of
- Netware servers, this can up your broadcast traffic to 6-12% of a 10Mb/sec
- ethernet. Sound daunting? (RIP is a pig even with *one* frametype,
- obviously...)
-
- We are working on getting *all* our servers and workstations on
- Ethernet_II ASAP because of this problem.
- --
- Shava Nerad Averett shava_averett@unc.edu
- /* all materials (c)1992, Shava Nerad Averett, and have nothing significant
- to do with the University of North Carolina, a mostly owned subsidiary
- of the NC Legislature, a mostly owned subsidiary of the DOT. */
-