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pnni-1 12/5/2012 | 12:17:27 AM
re: Riverstone Fuels 10GigE Price War What is the OPEX cost to keep the XGS up and running?
Or perhaps that is not important anymore?? You pay now or you pay later... How many times will you have to upgrade the code etc, etc. Riverstone are worse than Cisco about breaking or I mean fixing things in there code releases.
Iipoed 12/5/2012 | 12:17:22 AM
re: Riverstone Fuels 10GigE Price War Riverstone selling 10g is like bailing water with a bucket out of a ship that is 95% underwater.
fabric_man 12/5/2012 | 12:17:19 AM
re: Riverstone Fuels 10GigE Price War I don't fully understand how the vendor claims of Gbps and pps line up.

My understanding was that the Inter-Packet Gap in 10GbE (including the true IPG plus other filler) was 14 bytes. Assuming a minimum packet size of 64 bytes then means that true packet arrival rate is 78 bytes:

pps = 10e9/(78*8) = 16.03 Mpps per 10 Gbps channel

So, how can 160 Gbps line up with 200 Mpps? And 320 Gbps with 400 Mpps?

My cynical nature is leading me, reluctantly, to assume that there is some bogus specmanship going on - but of course I know that can't be true :-)

Seeking enlightenment,
- fabric_man
mugwhump 12/5/2012 | 12:17:18 AM
re: Riverstone Fuels 10GigE Price War Interesting approach to solving the IPG issue.

Take a look at http://www.force10networks.com...

Don't know what others are doing (if anything) to try to solve the issue. No mention of it on Riverstones's web site. Maybe they forgot it! ;-)
rpm 12/5/2012 | 12:17:17 AM
re: Riverstone Fuels 10GigE Price War The Riverstone 10 GbE line card is 1-port not 2-port and lists for $9995 acording to their web site...

rpm 12/5/2012 | 12:17:15 AM
re: Riverstone Fuels 10GigE Price War The price has now been moved to the right row for Riverstone, but there are still price inconsistencies.

The Riverstone 1-port card is $9,995 list optics included.

The Cisco 2-port card is $60,000 list +$8K for optics.

The Cisco 4-port card is $20,000 list +$16k for optics.

all these prices should be discounted by 30% for consistency with the stated format

wilecoyote 12/5/2012 | 12:17:12 AM
re: Riverstone Fuels 10GigE Price War This is actually pretty funny. Riverstone, Extreme, you shouldn't try to play Cisco's market delay games. You don't know how and it's so transparent. Translation: "please 3com, buy me!" I really have a 10G product. No really!"

Notice Foundry's silence. They're waiting until they have something to show their customers because, guess what? The reason their customers are their customers is because they've seen through the Cisco lies for the last 10 years and have decided to go a different direction. Foundry knows not to play games with customers and their results are showing. Extreme forgot this basic rule so you'll see them continue to flail.

Cisco's souped up 65K will not see a live network until October. FACT.

metroshark 12/5/2012 | 12:17:08 AM
re: Riverstone Fuels 10GigE Price War So, how can 160 Gbps line up with 200 Mpps? And 320 Gbps with 400 Mpps?

A wire-speed 10GigE port should be able to forward 64B packets at around 15Mpps. A box with 16 10GigE ports needs at least 240Mpps forwarding capacity. It is possible that these new Riverstone boxes have more than 15Mpps forwarding capacity per line card and maybe they are planning to introduce non-wirespeed line cards with higher 10G port count in the future.
Marguerite Reardon 12/5/2012 | 12:17:07 AM
re: Riverstone Fuels 10GigE Price War Riverstone is advertising the discounted price in their press release and on their website. The same is true of Force10. Foundry, Cisco and Extreme only talk about list prices, so I discounted those prices 30% to make them more consistent with Riverstone and Force10.
fiber_r_us 12/5/2012 | 12:17:05 AM
re: Riverstone Fuels 10GigE Price War How to calculate PPS for Ethernet:

Preamble = 8-bytes (7 for sync and 1 start of frame delimiter (SFD))
Minimum Packet = 64-bytes
>= 6-byte Source MAC address
>= 6-byte Destination MAC address
>= 2-byte Protocol type/length
>= 48-byte Data (data is padded to a min of 48)
>= 4-byte CRC
Inter-Packet Gap = 12-bytes (IPG)

So, a "64-byte minimum packet" is really 84-bytes of frame. This gives us:

84-bytes * 8-bits = 672-bits per frame


10,000,000 bits/sec / 672 = 14,880.952 frames/sec for 10Mbit Ethernet.

Just multiply by the appropriate factor of 10 for the other Ethernet speeds. So, for 10GE, you get 14,880,952 packets/sec, or about 15M as others have pointed out.

For maximal sized frames (non-jumbo), the data field is 1500-bytes, so you get a frame of 1538-bytes, or 12,304-bits. Thus,

10,000,000 / 12,304 = 812.744 frames/second for 10Mb...
812,744 frames/sec for 10GE.
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