Latency question - Juniper MX960 vs the Tellabs 8860
Looking for two latency profiles, best/worst cast would be great for the Telllabs 8860 and Juniper MX960. Looks like the Juniper may be in the 15us range Both cases would be a 10Gb -1Gb and 1Gb - 10Gb We’d understand the serialization piece; really looking to provide a customer the hardware latency, we don’t have a great means to test them Thanks all! Steve
Hey Steve, 15us would be more than you'll realistically see in uncongested MX960, but it is in the ball-bark. I've not tried Tellabs, if customer is latency sensitive you probably want to look constant time pipeline devices rather than run to completion npus. You'll see low single digit us on typical box. Remember that 10us is just 2km of fibre (1km of RTT). On Wed, Feb 13, 2019 at 7:28 PM Steve Danello <the76posse@gmail.com> wrote:
Looking for two latency profiles, best/worst cast would be great for the Telllabs 8860 and Juniper MX960. Looks like the Juniper may be in the 15us range
Both cases would be a 10Gb -1Gb and 1Gb - 10Gb
We’d understand the serialization piece; really looking to provide a customer the hardware latency, we don’t have a great means to test them
Thanks all!
Steve
-- ++ytti
Yes thank you Saku! We’ve accounted for the fiber distance. We just want to be able to quote the hardware latency. Thanks for verifying that Juniper; just need the Tellabs... thank you:) Sent from my iPhone
On Feb 13, 2019, at 12:53 PM, Saku Ytti <saku@ytti.fi> wrote:
Hey Steve,
15us would be more than you'll realistically see in uncongested MX960, but it is in the ball-bark. I've not tried Tellabs, if customer is latency sensitive you probably want to look constant time pipeline devices rather than run to completion npus. You'll see low single digit us on typical box. Remember that 10us is just 2km of fibre (1km of RTT).
On Wed, Feb 13, 2019 at 7:28 PM Steve Danello <the76posse@gmail.com> wrote:
Looking for two latency profiles, best/worst cast would be great for the Telllabs 8860 and Juniper MX960. Looks like the Juniper may be in the 15us range
Both cases would be a 10Gb -1Gb and 1Gb - 10Gb
We’d understand the serialization piece; really looking to provide a customer the hardware latency, we don’t have a great means to test them
Thanks all!
Steve
-- ++ytti
participants (2)
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Saku Ytti -
Steve Danello