nanog mailing list archives
Re: Inter-exchange media types
From: Hank Nussbacher <hank () ibm net il>
Date: Sun, 28 Apr 96 07:49:52 UTC
On Thu, 25 Apr 1996 12:34:25 -0400 Curtis Villamizar wrote:
For many products, there is a big difference between how many interfaces physically fit in the card cage and how many actually work under a fairly heavy load. Have you tested a 12 port switched 100 Mb/s ethernet under load? The DEC gigaswitch has been tested under load and has held up so far under load. The Cisco 5000 may bridge better than it routes since there is no route change to deal with, but I'd be a bit worried about deploying without stress testing. The problem for the major exchanges may soon be what to do when the gigaswitch runs out of bandwidth. Curtis
The Feb 1996 issue of Data Communications ran a benchmark on these switches along with a few others. I will just summerize the Digital and Cisco info that they state: Cisco Catalyst 5000 - Full duplex Ethernet, half duplex FDDI, full duplex fast Ethernet; Max: 96 Ethernet, 4 FDDI, 50 Fast Ethernet; Price: $22K for chassis, 24 Ethernet ports, 2 FDDI Digital Gigaswitch - Ethernet, Full Duplex FDDI; Max: 12 Ethernet, 8 FDDI; Price: $21K for chassis, 24 Ethernet ports, 2 FDDI Benchmarks: a) % of frames delivered without loss (100% load on 40 ports): Burst size (in 64 byte frames) 24: Cisco 99% DEC 76% 62: Cisco 100% DEC 75% 124: Cisco 100% DEC 65% 372: Cisco 100% DEC 51% 744 Cisco 100% DEC 49% b) % of frames delivered without loss (64 byte frames, 24 frame bursts on 40 ports): 70%: Cisco: 100% DEC: 81% 80% Cisco 99% DEC 79% 90% Cisco 99% DEC 85% 100% Cisco 99% DEC 75% 150% Cisco 99% DEC 22% c) Per port thruput: 64 byte frame per second (24 frame bursts on 40 ports) Cisco: 4891 DEC: 4391 d) Latency (microseconds) - 64 byte unidirectional traffic across 100Mb backbone Cisco: 79 DEC 179 Bottom line: The Gigaswitch performed the almost the worst (Fibronics took that honor) and the Cisco performed the best. Perhaps it is time to revisit the Gigaswitch technology? ---------------------------------------------------------------------- Hank Nussbacher Manager, Internet Technology Programs Telephone: +972 3 6978852 Vnet: HANK at TELVM1 Fax: +972 3 6978115 Internet: hank () ibm net il ---------------------------------------------------------------------- IBM Israel 2, Weizmann St. Tel Aviv 61336 ====== ======= === === http://www.ibm.net.il/ ====== ======== ==== ==== Dialup registration: 177-022-3993 == == == ==== ==== Company services: 03-6978663 == ====== == === == Internet sales fax: 03-6978115 == == === == = == Enquiries: info () ibm net il ====== ======== === === Technical support: noc () ibm net il ====== ======= === === ----------------------------------------------------------------------
Current thread:
- Re: what to do when the gigaswitches run out of gas???, (continued)
- Re: what to do when the gigaswitches run out of gas??? Mike O'Dell (Apr 25)
- Re: Inter-exchange media types Paul A Vixie (Apr 25)
- Re: Inter-exchange media types Andrew Partan (Apr 25)
- Re: Inter-exchange media types Michael Dillon (Apr 25)
- Re: Inter-exchange media types ipasha (Apr 25)
- Re: Inter-exchange media types Wolfgang Henke (Apr 25)
- Re: Inter-exchange media types Vadim Antonov (Apr 25)
- Re: Inter-exchange media types Paul Ferguson (Apr 25)
- Re: Inter-exchange media types Paul Ferguson (Apr 25)
- Re: Inter-exchange media types k claffy (Apr 27)
- Re: Inter-exchange media types Hank Nussbacher (Apr 27)
- Re: Inter-exchange media types Curtis Villamizar (Apr 29)
- Re: Inter-exchange media types ipasha (Apr 30)
- Re: Inter-exchange media types Peter Lothberg (Apr 30)
- Re: Inter-exchange media types Marten Terpstra (Apr 30)
- Re: Inter-exchange media types Peter Lothberg (Apr 30)
- Re: Inter-exchange media types Paul A Vixie (Apr 30)