Re: Juniper BGP Convergence Time

[Adam Kajtar <akajtar () wadsworthcity org>]

I could use static routes but I noticed since I moved to full routes I have
had a lot fewer customer complaints about latency(especially when it comes
to Voice and VPN traffic).

I wasn't using per-packet load balancing. I believe juniper default is per
IP.

My timers are as follows
 Active Holdtime: 90
 Keepalive Interval: 30

Would I be correct in thinking I need to contact my ISP to lower these
values?

An interesting note is when I had both ISPs connected into a single MX104
the failover was just a few seconds.

Thanks again.



On Tue, May 15, 2018 at 8:42 PM Ben Cannon <ben () 6by7 net> wrote:

> Have you checked your timeouts ?
>
> -Ben
>
> > On May 15, 2018, at 4:09 PM, Kaiser, Erich <erich () gotfusion net> wrote:
> >
> > Do you need full routes?  What about just a default route from BGP?
> >
> > Erich Kaiser
> > The Fusion Network
> > erich () gotfusion net
> > Office: 815-570-3101
> >
> >
> >
> >
> > > On Tue, May 15, 2018 at 5:38 PM, Aaron Gould <aaron1 () gvtc com> wrote:
> > >
> > > You sure it doesn't have something to do with 60 seconds * 3 = 180 secs
> of
> > > BGP neighbor Time out before it believes neighbor is dead and remove
> routes
> > > to that neighbor?
> > >
> > > Aaron
> > >
> > > > On May 15, 2018, at 9:10 AM, Adam Kajtar <akajtar () wadsworthcity org>
> > > wrote:
> > > > Hello:
> > > >
> > > > I'm running two Juniper MX104s. Each MX has 1 ISP connected running
> > > > BGP(full routes). iBGP is running between the routers via a two port
> 20G
> > > > lag. When one of the ISPs fails, it can take upwards of 2 minutes for
> > > > traffic to start flowing correctly. The router has the correct route in
> > > the
> > > > routing table, but it doesn't install it in the forwarding table for
> the
> > > > full two mins.
> > > >
> > > > I have a few questions if anyone could answer them.
> > > >
> > > >  - What would a usual convergence time be for this setup?
> > > >  - Is there anything I could do speed this process up? (I tried
> > > Multipath)
> > > >  - Any tips and tricks would be much appreciated
> > > >
> > > > Thanks in Advance
> > > > --
> > > > Adam Kajtar
> > > > Systems Administrator
> > > > City of Wadsworth
> > > > akajtar () wadsworthcity org
> > > > -----------------------------------------------------
> > > > http://www.wadsworthcity.com
> > > >
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> > > > <https://www.instagram.com/cityofwadsworth/> *|* YouTube
> > > > <https://www.youtube.com/channel/UCymlH-AZgvxTaHtgp3-AmDQ>


-- 
Adam Kajtar
Systems Administrator, Safety Services
City of Wadsworth
Office 330.335.2865
Cell 330.485.6510
akajtar () wadsworthcity org
-----------------------------------------------------
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