[Info-vax] Facebook service outage

[Arne Vajhøj]

On 10/4/2021 6:04 PM, Dave Froble wrote:
> On 10/4/2021 4:54 PM, Stephen Hoffman wrote:
>> Facebook, Instagram, Facebook Messenger, WhatsApp, Login with FB, etc.,
>> are all offline.
>>
>> The Facebook IP address space and all its services are inaccessible.
>>
>> Reportedly, this outage is due to erroneous BGP routing announcements.
>>
>> Reportedly, internal access including badges and badge readers and
>> building and door access controls are all offline, and remote access to
>> their peer routers is also all offline.
>>
>> This looks to be one of the biggest service outages around, and with a
>> detail—the BGP routing announcements—that y'all might want to consider
>> within your business continuity and business recovery plans.
> 
> 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 ...

BGP routing is how the internet figures out how to actually get from one
IP address to another IP address.

If you need to access a web site on the west coast does it flow:

your PC--your ISP router--ISP to Texas router--Texas router--Texas to 
west coast router--west coast router--web site firewall

or does it flow:

your PC--your ISP router--ISP to Chicago router--Chicago router--Chicago 
to west coast router--west coast router--web site firewall

If there is no valid info on how to get to that web site, then that web
site is unavailable.

The example may be oversimplified a bit, but I am not a network guy, so ...

:-)

Arne