home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!noc.near.net!hri.com!spool.mu.edu!darwin.sura.net!paladin.american.edu!auvm!USU.BITNET!JRD
- From: JRD@USU.BITNET (Joe Doupnik)
- Newsgroups: bit.listserv.novell
- Subject: Overhead of Packet Signatures
- Message-ID: <01GSMFX2VLLU926YV9@CC.USU.EDU>
- Date: 22 Dec 92 23:04:14 GMT
- Sender: NOVELERR@SUVM.SYR.EDU
- Reply-To: Novell LAN Interest Group <NOVELL@SUVM.BITNET>
- Lines: 39
- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- X-Envelope-to: novell@suvm.bitnet
- X-VMS-To: IN%"novell@suvm.bitnet"
- X-VMS-Cc: JRD
- MIME-version: 1.0
- Content-type: TEXT/PLAIN; CHARSET=US-ASCII
- Content-transfer-encoding: 7BIT
-
-
- In the latest issue of "Novell Research, Novell Application Notes",
- Vol 3 #12, Dec 1992, is a short article by Tom Bogard and Ken Neff on
- benchmarking the new security Packet Signature mechanism. The table below
- is the digest of the numbers; measurements were taken with Perform3 etc.
-
- Without Packet Signing With Packet Signing Overall
- Client overall server client overall server client Degradation
- Ethernet on ISA 386/33 server
- 8088 20.22 2.05 18.17 30.17 2.17 28.00 33.0%
- 286 3.62 2.05 1.57 5.17 2.18 3.55 36.8%
- 386 3.13 2.05 1.08 3.58 2.17 1.41 12.6%
- 486 2.91 2.06 0.85 3.15 2.15 1.00 7.6%
- Token Ring on ISA 386/33 server
- 8088 n/a n/a n/a n/a n/a n/a n/a
- 286 12.40 9.6 2.80 12.98 9.7 3.28 4.5%
- 386 10.00 9.6 0.40 10.31 9.7 0.61 3.0%
- 486 10.0 9.6 0.40 10.02 9.6 0.42 0.2%
- (Times above are in milliseconds, ms)
-
- clients: 8088(/4.77?), 286/16, 386/25, 486/50
- servers: 386/33 ISA, and also a 486/33 EISA
-
- Interpreting results (summarized, see article for full details):
- 1. Packet signing overhead at the server was measured as
- 100us (386) and 55us (486). Thus using say a 486/50 server
- reduces this overhead component.
- 2. Packet signing overhead at the client workstation was measured as
- 9828us (8088), 1970us (286), 330us (386), and 150us (486).
- 3. Heavy file transfers and requests will see the overhead similar
- to the above amounts, but
- 4. light use, such as word processing, will experience little.
- 5. Although the time delays in the table are real, normal mixed
- traffic on a net tends to mask them.
-
- Contact points for the NetWare Applications Notes publication are
- eliebing.novell@sjfsmtp.novell.com, (801) 429-7358 voice, -5511 fax.
-
- Joe D.
-