From: J.Baird@ONO.LINCOLN.AC.NZ
Newsgroups: bit.listserv.novell
Subject: Mac problems
Date: 16 Oct 92 03:34:58 GMT
Reply-To: Novell LAN Interest Group <NOVELL@SUVM.BITNET>
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
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Comments:     Warning -- original Sender: tag was BAIRD2@ONO.LINCOLN.AC.NZ

We have less than 10 Macintoshes on our netork but on several occasions over
the past two month, one of them (not always the same one) has begun bombarding
the server with packets at the rate of 600-1000/sec. This has a major impact
for all users on that server, and causes a general slowdown on the network. The
Macs appear to not be in use when the problem starts, and may or may not be
logged in. When the problem occurred yesterday, the Mac was spewing out
identical Get Volume Parameters Requests and the server was not responding to
these. My impression is that the Mac for whatever reason did not receive a
response to its initial request, so it keeps repeating it, and the server
ignores subsequent requests because its already responded. So the Mac blasts
away ad infinitum.

The Macs are various models, using Asante cards and either Novell or Asante
drivers. We are running NW/MAC 3.01.

Anyone else experienced this problem? Any solutions? I'll append a sample
packet below.

John

----------------------------------------------------------------------------
   John Baird                           Internet:   J.Baird@ono.lincoln.ac.nz
   Senior Computer Consultant           CompuServe: 75360,35
   Centre for Computing & Biometrics    Phone:      (64) (3) 325-2811
   Lincoln University                   Fax:        (64) (3) 325-2944
   Canterbury
   New Zealand
----------------------------------------------------------------------------

Frame: Number: 1           Length:    64 bytes
       Errors: None
       Receive Channels: GoodPkts
802.3: ------------------ IEEE 802.3 Datalink Layer ---------------------
       Station: 00-00-94-0A-25-FC ----> novell154C93
       Length:   35
802.2: ------------------ IEEE 802.2 Logical Link Control --------------
       SSAP: SNAP     DSAP: SNAP
       Unnumbered Command: Unnumbered Information (UI)
       SNAP Organization Code: 08 00 07
       SNAP Ethernet Type: 0x809B (AppleTalk)
e-ddp: ------------------ Extended - Datagram Delivery Protocol ---------
       (AppleTalk Phase 2)
       Datagram Length: 27            Hop Count: 0
       Checksum: 0x0000 (not used)
       Network: 3                ----> 5
       Node:    56               ----> 1
       Socket:  252              ----> 252
       Type: 0x03 (ATP)
  atp: ------------------ AppleTalk Transaction Protocol ----------------
       Function: 0x1 (Transaction Request)
       Flags: 0x4 (Exactly Once)
       Transaction Release Timer: 30 seconds
       Bit Map: 00000001
       Transaction ID: 45413
  asp: ------------------ AppleTalk Session Protocol -------------------
       Function: 0x02 (Command Request)
       Session Id: 122
       Sequence Number: 19582
  afp: ------------------ AppleTalk Filing Protocol --------------------
       Function: 0x11 (Get Volume Parameters Request)
       Volume ID: 4
       Bitmap: 0x0048 (Bytes Free, Modification Date)