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Technology Stocks : Newbridge Networks -- Ignore unavailable to you. Want to Upgrade?

To: zbyslaw owczarczyk who wrote (12099)	7/1/1999 3:47:00 PM
From: fumble	Respond to of 18016

On the Juniper technology - in addition to ZO's comments Excerpts <<..>> from data.com <<And Juniper guarantees wire speed even when the chassis is fully loaded. What's more, the M40 keeps things moving when packets are just 40 bytes long, according to Rick Wilder, senior manager of Internet technology at MCI Worldcom Inc. (Jackson, Miss.), who has tested the unit. While Cisco also claims wire speed, it doesn't guarantee anything beyond “close to wire speed” for 40-byte packets. And customers will have a hard time even assessing that claim, since Cisco refuses to disclose test results.>> This means that the technology that looks at the packet headers is fast. 40byte packets are relatively small, meaning that more packets/sec are moving through at a given wireline speed. <<The most recent port destinations are cached locally in a table; although the first packet is passed to the operating system for lookup, subsequent packets are simply switched at wire speed across the backplane.>> The packet header still needs to be looked at (and port# looked up) This local cache lookup is usually done with CAM memory (content addressable - see sager.com, which is expensive and usually limited in size. Thus these statistics are good if the packet destinations don't change very often (i.e., the port address does not get bumped out of the cache - triggering another operating system lookup). Also, as pointed out in the article, the central routing storage unit does not scale. Boring, boring,... Cisco got to $200 B on MARKETING..