<div dir="ltr">Consider if BGP is the way to go with redundancy - maybe <cough> DNS is a better way to steer traffic as you can, using a bunch of services out there, do live-ness testing of end points etc.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 2 May 2023 at 08:35, Steven Waite <<a href="mailto:steven@waites.com.au">steven@waites.com.au</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="auto">Thank you for everyone's replies as this has given me a solution. Love the Ausnog community:)<div><br></div><div> I will try again and reach out to our up stream carriers. Basically we are multi-homed with our primary site active with the second site as secondary to carry selective traffic and redundancy. This was manly to get around slow routing changes and also eliminating a risk of asymmetrical routing due to session based firewalls been in the mix. <div><div dir="ltr"><div><br></div></div><div dir="ltr"><br><blockquote type="cite">On 2 May 2023, at 8:50 am, Matthew Moyle-Croft <<a href="mailto:mmc@mmc.com.au" target="_blank">mmc@mmc.com.au</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr">Have to remember some BGP basics:<div><br></div><div>1) longest prefix (eg. /24 in your case) will always win.</div><div>2) localpref will always win when comparing identical prefixes.</div><div>3) A network will always use localpref to prefer directly connected customer routes.</div><div>4) ASPath length is not going to overcome the above.</div><div><br></div><div>What does "failover" mean to you? When there's a failure, look at what Vocus and TPG have in their route tables and the timing. Also check, are you actually withdrawing the routes during failure?</div><div><br></div><div>MMC </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 1 May 2023 at 18:09, Steven Waite <<a href="mailto:steven@waites.com.au" target="_blank">steven@waites.com.au</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">Good evening<br>
<br>
I hope everyone is well. We have a /23 block broken up between TPG /24 and Vocus /24 with the /23 advertise to both Vocus and TPG for failover. This worked will until recently as we noticed increasing failover times during maintenance and now takes around 10-15 minutes. Today I decided to try AS path prepending away from smallest prefix wins type of approach. I think Vocus and TPG ignores prepending as these are local routes thus the local route is preferred even with a lot of prepends. I would love to achieve the same thing via communities if it’s possible. Is someone able to share communities numbers that I should be using for Vocus/TPG please to advertise the primary route for a prefix?<br>
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Many thanks Steve<br>
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