[Info-vax] Facebook service outage
chris
chris-nospam at tridac.net
Mon Oct 4 20:22:40 EDT 2021
On 10/05/21 00:16, Scott Dorsey wrote:
> On 10/4/2021 6:04 PM, Dave Froble wrote:
>>
>> For those who don't get out much, how about explaining what "BGP routing
>> announcements" are.
>>
>> I could try looking it up, but, you used it, so you explain what it is ...
>
> If you are old you remember when there were all kinds of different ways
> that backbone sites used to decide where to route packets too. RIP, GGP,
> EGP, there were a bunch of different ways to decide what the "best" path
> from here to there is.
>
> That's all gone now. There is one way to transfer routing data around,
> and it is BGP. There is no more picking up the phone and calling up
> up Jon Postel to ask if he thought it was better to route through here
> or there. There are no more static routing tables that need manual updating
> at inopportune moments. BGP just works, and it works well when it's fed good
> data.
>
> Unfortunately BGP was designed in an era when ISPs could trust one another,
> and that's not really the case any more. It is possible to publish bad
> routing data for sites you don't like and get other sites to accept them.
> --scott
If you have routing tables that are working, wouldn't it be a good idea
to verify any new routes before admitted them to the working set tables,
or perhaps it does that already ?. Some sort of fail over mechanism.
Doesn't seem very robust as is...
Chris
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