100G Ethernet

100Gbit/s Ethernet Router Test: Alcatel-Lucent

Welcome to the continuation of our open test program aimed at validating the performance, service scalability and power efficiency of 100Gigabit Ethernet (100GbE) router interfaces. As more and more vendors are beginning to deploy the first generation of 100GbE interfaces for their flagship routers, European Advanced Networking Test Center AG (EANTC) and Light Reading have set up a public test program aimed to provide operators with an unbiased view of these new interfaces.

As was the case in our most recent test, we took an up-to-date mix of carrier network requirements and created a test plan that we intended to apply to all vendors participating in the program. Vendors also had the opportunity to define two of their own tests in addition, at our approval.

With the help of testing vendor Ixia, then performed agreed-upon tests at each vendor’s lab. The results will be presented in a series of articles right here on Light Reading -- one for each vendor who goes through the tests.

This report will recap the results for Alcatel-Lucent (NYSE: ALU), our latest test participant. Alcatel-Lucent's 7750 SR-12 has been around for some time and the company showed that adding 100GbE interfaces doesn't change much about the features operators are already familiar with. Alcatel-Lucent sometimes has their own way of doing things, but as you'll read they ably took on the challenge of this test.

The contents of this report are as follows:

Test Contents

Testing Info
We worked closely with Ixia Communications to ensure that our scalability goals were reached while meeting our No. 1 goal of testing services realistically. It's also worth reminding those who don’t use these tools day to day, that long passed are the days of so-called "packet blasting." Thankfully, IxNetwork -- the software we used for all of the tests -- allowed us to emulate more realistic scenarios. MPLS services testing requires intelligence in the tester to represent a virtual network with hundreds of nodes. IxNetwork calculates the resulting traffic to be sent to the device under test across the directly attached interfaces -- including signaling and routing protocol data as well as emulated customer data frames. This way, a reasonably complex environment with hundreds of VPNs and tens of thousands of subscribers can be emulated in a representative and reproducible way. For the 100Gigabit Ethernet test interface we used Ixia's K2 HSE100GETSP1. The software used was IxNetwork version, IxOS version 6.00.700.3.

The European Advanced Networking Test Center (EANTC) is an independent test lab founded in 1991 and based in Berlin, conducting vendor-neutral proof of concept and acceptance tests for service providers, governments and large enterprises. EANTC has been testing MPLS routers, measuring performance and interoperability, for nearly a decade at the request of industry publications and service providers.

EANTC’s role in this program was to define the test topics in detail, communicate with the vendors, coordinate with the test equipment vendor (Ixia) and conduct the tests at the vendors’ locations. EANTC engineered, then extensively documented the results. Vendors participating in the campaign had to submit their products to a rigorous test in a controlled environment contractually defined. For this independent test, EANTC exclusively reported to Light Reading. The vendors participating in the test did not review the individual reports before their release. Each vendor had a right to veto publication of the test results as a whole, but not to veto individual test cases.

— Carsten Rossenhövel is Managing Director of the European Advanced Networking Test Center AG (EANTC) , an independent test lab in Berlin. EANTC offers vendor-neutral network test services for manufacturers, service providers, governments and large enterprises. Carsten heads EANTC's manufacturer testing and certification group and interoperability test events. He has over 20 years of experience in data networks and testing.

Jonathan Morin, EANTC, managed the project, worked with vendors and co-authored the article.

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redefine 12/5/2012 | 4:58:07 PM
re: 100Gbit/s Ethernet Router Test: Alcatel-Lucent

"The Alcatel-Lucent 7750 SR-12 was configured to obviously support all 32,000 services. In addition, Alcatel-Lucent engineers configured policers on the system (matching each of our PCP classes) and applied the configuration to each customer"


Does it mean that BRAS-like features are supported on the card, like downloading subscriber profile from AAA etc? 

duwenhua 12/5/2012 | 4:58:37 PM
re: 100Gbit/s Ethernet Router Test: Alcatel-Lucent

In the IPv4 unicast porfermance test, it use 100G in and 10x10GE out, the traffic is IMIX.  So, 

1) How about  one 100G flow unicat forwarding performance (100G in and 100G out)? 

2) How about 64Byte or 128Byte unicat forwarding performance ?

einstein 12/5/2012 | 4:58:48 PM
re: 100Gbit/s Ethernet Router Test: Alcatel-Lucent <div>

Posted an earlier post in the other thread, but moved it here since I guess more people will be reading the details of the report.

I'm curious and interested to know how they dissipate heat from 100G on the existing SR12 chassis. Surely the chassis was never built to support 100G. IOM3 on the existing system was already a physical feat and CPM has to be run in non-redundant.

And with the FP3, if this goes into existing SR-12, more heat will be generated. While it is fair to say, the number of FP3 integrated IOM/MDA needed per chassis is unlikely to exceed 2 for trunk purpose, but I'm guessing there must be a finite number of cards possible with heating problems.

olegzz 12/5/2012 | 4:59:07 PM
re: 100Gbit/s Ethernet Router Test: Alcatel-Lucent

Reversed traffic prioritization doesn't show a real customer scenario.
In real life 100G is mostly used for Egress traffic aggregated from multiple 10G interfaces
towards the core.
It seems to be some hidden restrictions or lack of functionality inside 7750 concealing by ALU.

Test doesn't include the MAC learning rate - very important parameter.
It is easy to calculate this - just calculate the time of losing packets when you start this test.
As soon traffic lost get stopped - all MACs are learned.

The LAG test was quite impressive.

Houman0 12/5/2012 | 4:59:09 PM
re: 100Gbit/s Ethernet Router Test: Alcatel-Lucent

As correctly mentioned by a few others, the CFP modules used in this test were in fact LR10 variants (SR10 is a typo). Of course the LR4 variant is also supported and shipping. In either case for LR4 or LR10 there is an embedded WDM mux/demux function such that the 100G interface is served over only 2 fibers (TX &amp; RX) and not 20.

krishanguru143 12/5/2012 | 4:59:09 PM
re: 100Gbit/s Ethernet Router Test: Alcatel-Lucent

Both cards that ALU has; single and dual port 100GigE all handle it with two fibers per port.


On the Ixia side going into the SR-12, they had 10 physical ports and each were not dependent on the the others; so no lag was used as that maxes out at 8 ports per lag group. &nbsp;Each port used 2 fibers; so 20 in total. &nbsp;On the 100GigE interface, it was two fibers going into a single port. &nbsp;What they were showing with the test, the IMM could handle 100G of data. &nbsp;So 100G into a single slot. &nbsp;The FP3 that ALU is using can handle 400G of throughput. &nbsp;So 4 port 100G cards will be available in the future.


With the card being run by the FP3, it won't matter if the lanes are 10G or 25G, the same physical silicon is handling it. &nbsp;So the test of 4x25 will produce the same result.


They should have also mentioned what the forwarding rates were for the Multicast groups.

furious_george 12/5/2012 | 4:59:09 PM
re: 100Gbit/s Ethernet Router Test: Alcatel-Lucent

The "LR10" is not an IEEE standard. &nbsp;It is a multi-source agreement based upon a proposal from Santur. &nbsp;There are many pros &amp; cons associated with it. &nbsp;For a list of the pros, see&nbsp;http://www.10x10msa.org

I'm very pessimistic on it, but one never knows.



furious_george 12/5/2012 | 4:59:10 PM
re: 100Gbit/s Ethernet Router Test: Alcatel-Lucent



100GBASE-SR10 is an IEEE standard defined interface for 100 Gigabit Ethernet. &nbsp;I don't believe that the full clause is accessible for free online, but I'll point you to the presentation that was the basis for the eventual detailed specification for this PMD interface.


You are correct that the 100GE packet is striped across a physical bus of 10 optical lanes, however, the key point is that this is a 100GE packet. &nbsp;The IEEE standardized the SR10 as a low cost 100GE variant for &lt;100m connectivity.

Note I do not work for ALU, nor do I have any knowledge of their product -- I'm just chiming in on the IEEE standard.



sdmitriev 12/5/2012 | 4:59:10 PM
re: 100Gbit/s Ethernet Router Test: Alcatel-Lucent

There are only three types of CFPs available for 7750 right now: LR4 10km, OTU4 LR10 10km and LR10 4/10km (4km OTU4 or 10km 100GE). SR10, for sure, is typo.

^Eagle^ 12/5/2012 | 4:59:10 PM
re: 100Gbit/s Ethernet Router Test: Alcatel-Lucent


Thanks for the clarification regards LR-10. &nbsp;I am very aware of the LR-10 spec. &nbsp;If the article had stated that, I would never have made my post. &nbsp;The article stated that it was an SR10 interface.

Hence the comments.

I am also quite aware of the 10x10 SerDes on CFP and the gearbox requirement for CFP to use 25G lanes. &nbsp;I have been very involved with 10G, 40G, 100G (including 4x25 and all the various reaches in the standards and proposed standards) applications for many years. &nbsp;

And I get it regards the packet processor, the data plane and bit level muxing.

if the original article, or the editor or the ALU company representative who should have reviewed it before publication for accuracy had caught it, and the article had not incorrectly stated SR10, this discussion would never have happened.

Garci, again, thanks for the clarification.


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