<html><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:16px"><div id="yui_3_16_0_1_1423630975412_38140" dir="ltr"><span id="yui_3_16_0_1_1423630975412_38177">The other thing to remember is that link carrier down might/should cause the BGP session to be torn down virtually instantly if you have a direct physical link between the routers. BGP keepalives and BFD are there for when that isn't the case.</span></div><br> <div style="font-family: Helvetica Neue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif; font-size: 16px;" id="yui_3_16_0_1_1423630975412_38183"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif; font-size: 12px;" id="yui_3_16_0_1_1423630975412_38182"> <div dir="ltr" id="yui_3_16_0_1_1423630975412_38181"> <hr size="1"> <font size="2" face="Arial" id="yui_3_16_0_1_1423630975412_38180"> <b><span style="font-weight:bold;">From:</span></b> Alex Samad - Yieldbroker <Alex.Samad@yieldbroker.com><br> <b><span style="font-weight: bold;">To:</span></b> "ausnog@lists.ausnog.net" <ausnog@lists.ausnog.net> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, 11 February 2015, 11:06<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [AusNOG] BFD on transit connections<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1423630975412_38184"><br><div id="yiv2131686144"><style>#yiv2131686144 #yiv2131686144 --
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<div class="yiv2131686144MsoNormal" id="yui_3_16_0_1_1423630975412_38185"><span style="font-size:11.0pt;">Hi</span></div>
<div class="yiv2131686144MsoNormal" id="yui_3_16_0_1_1423630975412_38188"><span style="font-size:11.0pt;"> </span></div>
<div class="yiv2131686144MsoNormal"><span style="font-size:11.0pt;">That is the backup plan</span></div>
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<div class="yiv2131686144MsoNormal"><span style="font-size:11.0pt;">Alex</span></div>
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<div class="yiv2131686144MsoNormal" id="yui_3_16_0_1_1423630975412_38191"><b><span lang="EN-US" style="font-size:10.0pt;">From:</span></b><span lang="EN-US" style="font-size:10.0pt;" id="yui_3_16_0_1_1423630975412_38190"> Tom Paseka [mailto:tom@cloudflare.com]
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<b>Sent:</b> Wednesday, 11 February 2015 11:05 AM<br clear="none">
<b>To:</b> Alex Samad - Yieldbroker<br clear="none">
<b>Cc:</b> ausnog@lists.ausnog.net<br clear="none">
<b>Subject:</b> Re: [AusNOG] BFD on transit connections</span></div>
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<div class="yiv2131686144MsoNormal">Just configure the lower timer :) (10/30 seconds being all that Junipers will accept). BGP will negotiate the lowest possible time between peers.</div>
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<div class="yiv2131686144MsoNormal">-Tom</div>
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<div class="yiv2131686144MsoNormal">On Tue, Feb 10, 2015 at 3:56 PM, Alex Samad - Yieldbroker <<a rel="nofollow" shape="rect" ymailto="mailto:Alex.Samad@yieldbroker.com" target="_blank" href="mailto:Alex.Samad@yieldbroker.com">Alex.Samad@yieldbroker.com</a>> wrote:</div>
<div class="yiv2131686144MsoNormal">Hi<br clear="none">
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I have been in the process of trying to BFD all my BGP peers recently, to bring down my convergence times.<br clear="none">
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Interestingly I deal with 4 providers, so far I have had 2 who will not implement nor plan to. 1 who is thinking about it and 1 who was ready to turn it on.<br clear="none">
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This has raised my curiosity a bit. When I asked the list about low values for BGP keepalive/hold, I got the impression some (few) used low values. But most used the default 3m.<br clear="none">
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3min seem like an eternity in networking time.<br clear="none">
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So am I being a bad netizen asking for BFD or low (10/30) BGP timers ?<br clear="none">
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Alex<br clear="none">
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