Hal Murray wrote:
> BlackLists wrote:
>> As far as I can tell the products have all the knobs
>> they need to be properly configured to deal with
>> the issue.
>>
>> The ISPs / NOC staff / IT departments / ... just
>> aren't taking the time, to properly / fully configure
>> the products, rather than just the minimal
>> configuration necessary to make it work.
>
> The defaults have to work reasonably well. The support
> staff doesn't have enough time to help each user setup
> their system correctly.
If the only issue is enduser equipment configuration,
then its not going to bring down the whole internet
(as implied), as the transit equipment can deal with it
as necessary;
If the transit equipment features to deal with it were
enabled, (which the implication is that is not happening).
ISPs, Data Centers, Backbone transit providers, all
have to configure their routers, that they apparently
chose not to configure the features necessary to
mitigate the issue, is what all the hysteria about
buffer-bloat appears to be about.
To keep it slightly on topic;
This means some NTP packets may get excessively delayed
or thrown away in transit;
Due to too many TCP packets, buffered for too long.
For so long that the TCP retries might even reach
the same huge buffer.
Then the newest packets start getting dropped at the router,
as compared to some mitigation techniques, that throw
away packets at random when a much smaller buffer starts
getting full (still might be a NTP packet that gets dropped).
There are also other mitigation techniques the routers can use,
that will inform up stream and down stream routers that
traffic is backing up at the router in between.
The upstream / downstream routers may also start dropping
packets after awhile to mitigate the issue, as well as
telling the paths up and down stream of the traffic backup.
Eventually it might reach all the way back to (yes)
the enduser's equipment, and if that end users equipment
follows to the traffic jam notification, it is supposed
to slow its output pace till the notification goes away.
--
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