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<div>Hello All,</div>
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<div>Sorry to reply late, but it seems like you were hitting the buffer limit for a port domain (group of ports). I don’t have an FLS in front of me (flying ATM) so I can’t confirm, but I think we’re breaking up the buffer space into reserved segments for each
port group. The reasoning behind this is that Is keeps “slow drain” devices on a single interface from using up all available buffer space for the switch. The down side is that if a port exhausts its allotted buffers, it can cause slow downs.</div>
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<div>Over the years we’ve gone back in forth over whether its better to ship with shared buffers enabled; I think it would generate the same amount of TAC requests no matter what we do. Although the FLS isn’t as beefy as the FCX or ICX, it should still have
some nobs you can turn to increase performance. This should be in the config guide. </div>
<div><br>
</div>
<div>I’d try to narrow down what device or devices is causing buffer pressure on the switch and consider enabling ethernet pause-frames (flow control) on the switch and neighboring devices. There’s also different QOS setting that can switch from stick queues
to weighted round-robin (and other types) to help make better use of the buffers on the uplink ports. </div>
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<div>Sorry you’re running into this. The FLS is a very good campus access switch platform (good latency and minimal oversubscription, for a good cost), but my view is that it’s not the best switch to front-end server connections or heavy I/O. Others may disagree
with me on this though. </div>
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<div>Wilbur</div>
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<span style="font-weight:bold">From: </span>"<a href="mailto:nethub@gmail.com">nethub@gmail.com</a>"<br>
<span style="font-weight:bold">Date: </span>Friday, February 13, 2015 at 4:13 PM<br>
<span style="font-weight:bold">To: </span>Brad Fleming<br>
<span style="font-weight:bold">Cc: </span>'Jeroen Wunnink | Hibernia Networks', "<a href="mailto:foundry-nsp@puck.nether.net">foundry-nsp@puck.nether.net</a>"<br>
<span style="font-weight:bold">Subject: </span>Re: [f-nsp] MLX throughput issues<br>
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<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">We already tried a full system reboot last night and it didn’t seem to help. I’ll definitely keep your switch fabric reboot procedure in mind in
case we run into that in the future.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">I think we may have figured out at least a short-term solution. On the FLS648, we ran the command “buffer-sharing-full” and immediately we were able
to get better speeds. It seems as though the FLS648’s buffers may have been causing the issue. We’ll continue to monitor over the next few days and see if this actually solves the issue.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Thanks everyone for your feedback thus far.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">From:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;"> Brad Fleming [<a href="mailto:bdflemin@gmail.com">mailto:bdflemin@gmail.com</a>]
<br>
<b>Sent:</b> Friday, February 13, 2015 4:24 PM<br>
<b>To:</b> <a href="mailto:nethub@gmail.com">nethub@gmail.com</a><br>
<b>Cc:</b> Jeroen Wunnink | Hibernia Networks; <a href="mailto:foundry-nsp@puck.nether.net">
foundry-nsp@puck.nether.net</a><br>
<b>Subject:</b> Re: [f-nsp] MLX throughput issues<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Over the years we’ve seen odd issues where one of the switch-fabric-links will “wigout” and some of the data moving between cards will get corrupted. When this happens we power cycle each switch fab one at a time using this process:<o:p></o:p></p>
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<p class="MsoNormal">1) Shutdown SFM #3<o:p></o:p></p>
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<p class="MsoNormal">2) Wait 1 minute<o:p></o:p></p>
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<p class="MsoNormal">3) Power SFM #3 on again<o:p></o:p></p>
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<p class="MsoNormal">4) Verify all SFM links are up to SFM#3<o:p></o:p></p>
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<p class="MsoNormal">5) Wait 1 minute<o:p></o:p></p>
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<p class="MsoNormal">6) Perform steps 1-5 for SFM #2<o:p></o:p></p>
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<p class="MsoNormal">7) Perform steps 1-5 for SFM #3<o:p></o:p></p>
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<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">Not sure you’re seeing the same issue that we see but the “SFM Dance” (as we call it) is a once-every-four-months thing somewhere across our 16 XMR4000 boxes. It can be done with little to no impact if you are patient verify status before
moving to the next SFM.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal">On Feb 13, 2015, at 11:41 AM, <a href="mailto:nethub@gmail.com">
nethub@gmail.com</a> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">We have three switch fabrics installed, all are under 1% utilized.</span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">From:</span></b><span class="apple-converted-space"><span style="font-size: 10pt; font-family: Tahoma, sans-serif;"> </span></span><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">Jeroen
Wunnink | Hibernia Networks [<a href="mailto:jeroen.wunnink@atrato.com"><span style="color:purple">mailto:jeroen.wunnink@atrato.com</span></a>]<span class="apple-converted-space"> </span><br>
<b>Sent:</b><span class="apple-converted-space"> </span>Friday, February 13, 2015 12:27 PM<br>
<b>To:</b><span class="apple-converted-space"> </span><a href="mailto:nethub@gmail.com"><span style="color:purple">nethub@gmail.com</span></a>; 'Jeroen Wunnink | Hibernia Networks'<br>
<b>Subject:</b><span class="apple-converted-space"> </span>Re: [f-nsp] MLX throughput issues</span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
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<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">How many switchfabrics do you have in that MLX and how high is the utilization on them<br>
<br>
On 13/02/15 18:12,<span class="apple-converted-space"> </span><a href="mailto:nethub@gmail.com"><span style="color:purple">nethub@gmail.com</span></a><span class="apple-converted-space"> </span>wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">We also tested with a spare Quanta LB4M we have and are seeing about the same speeds as we are seeing with the FLS648 (around
20MB/s or 160Mbps).</span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">I also reduced the number of routes we are accepting down to about 189K and that did not make a difference.</span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">From:</span></b><span class="apple-converted-space"><span style="font-size: 10pt; font-family: Tahoma, sans-serif;"> </span></span><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">foundry-nsp
[<a href="mailto:foundry-nsp-bounces@puck.nether.net"><span style="color:purple">mailto:foundry-nsp-bounces@puck.nether.net</span></a>]<span class="apple-converted-space"> </span><b>On Behalf Of<span class="apple-converted-space"> </span></b>Jeroen Wunnink
| Hibernia Networks<br>
<b>Sent:</b><span class="apple-converted-space"> </span>Friday, February 13, 2015 3:35 AM<br>
<b>To:</b><span class="apple-converted-space"> </span><a href="mailto:foundry-nsp@puck.nether.net"><span style="color:purple">foundry-nsp@puck.nether.net</span></a><br>
<b>Subject:</b><span class="apple-converted-space"> </span>Re: [f-nsp] MLX throughput issues</span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
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<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">The FLS switches do something weird with packets. I've noticed they somehow interfere with changing the MSS window size dynamically, resulting in
destinations further away having very poor speed results compared to destinations close by.<span class="apple-converted-space"> </span><br>
<br>
We got rid of those a while ago.<br>
<br>
<br>
On 12/02/15 17:37,<span class="apple-converted-space"> </span><a href="mailto:nethub@gmail.com"><span style="color:purple">nethub@gmail.com</span></a><span class="apple-converted-space"> </span>wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">We are having a strange issue on our MLX running code 5.6.00c. We are encountering some throughput issues that seem to be randomly impacting specific
networks.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
</div>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">We use the MLX to handle both external BGP and internal VLAN routing. Each FLS648 is used for Layer 2 VLANs only.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">From a server connected by 1 Gbps uplink to a Foundry FLS648 switch, which is then connected to the MLX on a 10 Gbps port, running a speed test to
an external network is getting 20MB/s.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">Connecting the same server directly to the MLX is getting 70MB/s.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">Connecting the same server to one of my customer's Juniper EX3200 (which BGP peers with the MLX) also gets 70MB/s.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">Testing to another external network, all three scenarios get 110MB/s.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">The path to both test network locations goes through the same IP transit provider.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
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<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">We are running NI-MLX-MR with 2GB RAM, NI-MLX-10Gx4 connect to the Foundry FLS648 by XFP-10G-LR, NI-MLX-1Gx20-GC was used for directly connecting
the server. A separate NI-MLX-10Gx4 connects to our upstream BGP providers. Customer’s Juniper EX3200 connects to the same NI-MLX-10Gx4 as the FLS648. We take default routes plus full tables from three providers by BGP, but filter out most of the routes.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">The fiber and optics on everything look fine. CPU usage is less than 10% on the MLX and all line cards and CPU usage at 1% on the FLS648. ARP table
on the MLX is about 12K, and BGP table is about 308K routes.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size: 11pt; font-family: Calibri, sans-serif;">Any assistance would be appreciated. I suspect there is a setting that we’re missing on the MLX that is causing this issue.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family: 'Times New Roman', serif, serif;"><br>
<br>
<br>
<br>
<br>
</span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<pre style="background:white">_______________________________________________<o:p></o:p></pre>
<pre style="background:white">foundry-nsp mailing list<o:p></o:p></pre>
<pre style="background:white"><a href="mailto:foundry-nsp@puck.nether.net"><span style="color:purple">foundry-nsp@puck.nether.net</span></a><o:p></o:p></pre>
<pre style="background:white"><a href="http://puck.nether.net/mailman/listinfo/foundry-nsp"><span style="color:purple">http://puck.nether.net/mailman/listinfo/foundry-nsp</span></a><o:p></o:p></pre>
</blockquote>
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<p class="MsoNormal" style="background:white"><span style="font-family: 'Times New Roman', serif, serif;"><br>
<br>
<br>
<br>
<br>
</span><span style="font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p>
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<pre style="background:white">-- <o:p></o:p></pre>
<pre style="background:white"> <o:p></o:p></pre>
<pre style="background:white">Jeroen Wunnink<o:p></o:p></pre>
<pre style="background:white">IP NOC Manager - Hibernia Networks<o:p></o:p></pre>
<pre style="background:white">Main numbers (Ext: 1011): USA +1.908.516.4200 | UK +44.1704.322.300 <o:p></o:p></pre>
<pre style="background:white">Netherlands +31.208.200.622 | 24/7 IP NOC Phone: +31.20.82.00.623<o:p></o:p></pre>
<pre style="background:white"><a href="mailto:jeroen.wunnink@hibernianetworks.com"><span style="color:purple">jeroen.wunnink@hibernianetworks.com</span></a><o:p></o:p></pre>
<pre style="background:white"><a href="http://www.hibernianetworks.com/"><span style="color:purple">www.hibernianetworks.com</span></a><o:p></o:p></pre>
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<pre style="background:white">-- <o:p></o:p></pre>
<pre style="background:white"> <o:p></o:p></pre>
<pre style="background:white">Jeroen Wunnink<o:p></o:p></pre>
<pre style="background:white">IP NOC Manager - Hibernia Networks<o:p></o:p></pre>
<pre style="background:white">Main numbers (Ext: 1011): USA +1.908.516.4200 | UK +44.1704.322.300 <o:p></o:p></pre>
<pre style="background:white">Netherlands +31.208.200.622 | 24/7 IP NOC Phone: +31.20.82.00.623<o:p></o:p></pre>
<pre style="background:white"><a href="mailto:jeroen.wunnink@hibernianetworks.com"><span style="color:purple">jeroen.wunnink@hibernianetworks.com</span></a><o:p></o:p></pre>
<pre style="background:white"><a href="http://www.hibernianetworks.com/"><span style="color:purple">www.hibernianetworks.com</span></a><o:p></o:p></pre>
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