Nortel's Terabit Cluster evaluated

NETWORK WORLD NEWSLETTER: JEFF CARUSO ON HIGH SPEED LANS
06/30/05
Today's focus: Nortel's Terabit Cluster evaluated

Dear networking.world@gmail.com,

In this issue:

* Tolly Group reports on Nortel's Terabit Cluster Solution
* Links related to High Speed LANs
* Featured reader resource
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Today's focus: Nortel's Terabit Cluster evaluated

By Jeff Caruso

It has been a while since I've highlighted a report from The
Tolly Group, which many readers found useful. Tolly recently
evaluated Nortel's Terabit Cluster Solution, which the testing
firm describes as a combination of resilient hardware and
software in Nortel's Ethernet Routing Switch 8600.

As always, I should note that Nortel itself commissioned Tolly
to evaluate the system and publish the results.

Tolly focused on the resiliency of the system, particularly with
regard to supporting multimedia traffic. The firm found that it
provides sub-second failover when there are failures; Tolly
notes that this is a huge advantage over Spanning Tree, which
can take up to 32 seconds to recover when a link goes down.

The test is an affirmation of Nortel's Split Multi Link
Trunking, or SMLT, which is the technology behind Nortel's
sub-second recovery. Tolly also tested SMLT with multimedia
traffic that requires multicast support and said there was
"minimal loss in video frames and quality."

Tolly found that the system can move 649 million frames per
second in two directions, with latency under 25 microseconds,
even at Layer 3. The firm notes that this figure is well within
the ITU-T specification for multimedia traffic. Tolly took these
measurements across three hops.

The ITU-T G.1010 specification says that packet loss must be
less than 1%, while the loss for the Nortel system came in at
0.88%.

For full details, the abstract and link to the PDF of the free
report can be found here:
<http://www.tollygroup.com/DocDetail.aspx?DocNumber=205116>

RELATED EDITORIAL LINKS

Extreme updates its wireless LAN menu
Network World, 06/27/05
http://www.networkworld.com/nllan2955
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To contact: Jeff Caruso

Jeff Caruso is managing editor of online news for Network World.
He oversees daily online news posting and newsletter editing,
and writes the NetFlash daily news summary, the High-Speed LANs
newsletter and the Voices of Networking newsletter. Contact him
at <mailto:jcaruso@nww.com>
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This newsletter is sponsored by Oracle
Boost the quantity and quality of customer interactions!

How can companies get a fuller, sharper picture of their
customers to boost the quantity and quality of customer
interactions? By creating a standardized customer-data model via
an "information grid." IDC analyst Stephen Hendrick explains how
to achieve a "360-degree view" of customers for better selling
and marketing.
http://www.fattail.com/redir/redirect.asp?CID=107423
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