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BGP Multihoming 2 providers full or partial?
- Subject: BGP Multihoming 2 providers full or partial?
- From: baldur.norddahl at gmail.com (Baldur Norddahl)
- Date: Mon, 1 Jun 2015 23:13:47 +0200
- In-reply-to: <CAP-guGVjZ1iLt_K3TTE9HjPQcYJd=a+W_HRqPZN9-kNOtGYRGQ@mail.gmail.com>
- References: <HE1PR02MB0732196792FECBE28AF52F88D6C90@HE1PR02MB0732.eurprd02.prod.outlook.com> <CAPkb-7AUqt6oYGcx47bjNb4avYSRQ=5wyG0CSFwV56y0hNvBRg@mail.gmail.com> <[email protected]> <CAPkb-7B-_Q4cPYDvDc6K-bJEAOBSjWkMa6FDX2KD4Tt9ZaTvPg@mail.gmail.com> <[email protected]> <[email protected]> <CAP-guGVjZ1iLt_K3TTE9HjPQcYJd=a+W_HRqPZN9-kNOtGYRGQ@mail.gmail.com>
This is only a problem if you use so called tier 1 transit providers.
The smaller fish in the pond have multiple transits themselves and will
there by always have an alternative route available.
Regards
Baldur
Den 01/06/2015 22.32 skrev "William Herrin" <bill at herrin.us>:
> On Mon, Jun 1, 2015 at 2:40 PM, Blake Hudson <blake at ispn.net> wrote:
> > A gateway of last resort, also called a backup default route, will take
> care
> > of partitions
>
> No, Blake, it won't. A partition means one of your ISPs has no route
> to the destination. Route the packet to that ISP via a default route
> and it gets sent to /dev/null. More, during a partition you don't get
> to pick which of your ISPs lack the route.
>
> Regards,
> Bill Herrin
>
>
>
> --
> William Herrin ................ herrin at dirtside.com bill at herrin.us
> Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
>