Re: Best way to have redundancy announcing on separate routers

[Tom Beecher <beecher () beecher cc>]

Jean-

Yeah, don't worry about people complaining.

Is this an accurate description of what you are trying to achieve?

- Have 2 different sets of prefixes that you announce. Set A via
router1/ISP1 , Set B via router2/ISP2
- If BGP to one of your ISPs goes down, start announcing those prefixes to
the other ISP. ( Example, if ISP2 goes down, start announcing prefix Set B
over ISP1 )

On Thu, Dec 26, 2024 at 8:16 AM Jean Franco <jfranco () maila inf br> wrote:

> Hi guys,
> I've been on the list for as long as I cannot even remember.
> So just you know, I'm not new at this.
>
> This is no easy task, that's why I came here looking for help.
> I'm sorry if I brought anguish to the experts on the list!
> I thought I could bring something that someone may have experienced before.
>
> I haven't solved this yet, but at least I've received some
> valuable suggestions and I Thank you!
>
> About all the details of the connections, numbers of peerings, PNI's and
> IXP's I have left them out, since I figured this additional information
> could make things worse.
>
> ISP 1 <router01> ====20KM====<Router>====20KM====<router02> ISP2
>
> The ISP connections are all 10G.
> I don't believe these routers are DFZ capable.
> All the routers are well capable and already receive the full routes.
> The connections between these routers are 40G.
>
> Best regards,
>
>
> On Thu, Dec 26, 2024 at 12:53 AM Bryan Fields <Bryan () bryanfields net>
> wrote:
>
> > On 12/25/24 6:18 PM, Randy Bush wrote:
> > > where does one go for is-is help?  the mtu issie can be painful!!!
> >
> > I think here would be good too.  I recently had to do this between a Cisco
> > 3945e and a Juniper, and from my unrevised notes:
> >
> > vlan {
> >   unit 405 {
> >     family iso {
> >     # holy shit this is important.  CISCO and Juniper will not talk
> > unless the
> > MTU is set
> >         mtu 1492;
> >       }
> >    }
> > }
> >
> > :-)
> >
> > --
> > Bryan Fields
> >
> > 727-409-1194 - Voice
> > http://bryanfields.net