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SRDF/A over GigE packet loss
Studying for exam E20-326 in Module 6 check your knowledge questions;
Q: What is the EMC recommendation for packet loss in SRDF/A over GigE implementations?
A: When I answer 0.1% as is detailed in the study material, it gives me incorrect answer stating correct answer is 0.01% (This is the recommendations for SRDF/S)... Is this a typo and which is right for the exam...?
Thanks folks,
Gerald
KEHutchinson
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April 1st, 2013 09:00
I checked in with Ed Gibbons, one of our Symmetrix SMEs.
He sent this document, and advises you to check on page 95, for this paragraph:
A quality link should have packet loss no greater than 0.01%. SRDF can tolerate packet loss up to 1%. If the packet loss is greater than 0.01% it is not considered a quality link and will typically result in throughput that is severally impacted.
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docu6182_Symmetrix-Remote-Data-Facility-(SRDF)-Connectivity-Guide.pdf
Anonymous
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April 4th, 2013 10:00
Thanks for the info Kate, yep I double checked with Vanchi, acceptable rates for packet loss are:
SRDF/S - 0.01%
SRDF/A - 0.1%
KEHutchinson
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April 4th, 2013 13:00
Great! I'll let Ed know. And tell Vanchi he should join in the ECN, so he can help everyone with answers!
RRR
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April 12th, 2013 02:00
Yeah, I wonder why Vanchi isn't on ECN. Andre Rossouw is a member though.
I also miss VS and Shekhar