From: Mikael Abrahamsson <swmike@swm.pp.se>
To: bloat@lists.bufferbloat.net
Subject: [Bloat] datapoint from one vendor regarding bloat
Date: Thu, 11 Apr 2019 12:38:54 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.1904111234410.3490@uplift.swm.pp.se> (raw)
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Hi,
I talked to Nokia (former Alcatel/Lucent equipment) regarding their
typical buffer settings on BNG. I thought their answer might be relevant
as a data point for people to have when they do testing:
https://infoproducts.alcatel-lucent.com/cgi-bin/dbaccessfilename.cgi/3HE13300AAAATQZZA01_V1_Advanced%20Configuration%20Guide%20for%207450%20ESS%207750%20SR%20and%207950%20XRS%20for%20Releases%20up%20to%2014.0.R7%20-%20Part%20II.pdf
"mbs and cbs — The mbs defines the MBS for the PIR bucket and the cbs
defines the CBS for the CIR bucket, both can be configured in bytes or
kilobytes. Note that the PIR MBS applies to high burst priority packets
(these are packets whose classification match criteria is configured with
priority high at the ingress and are in-profile packets at the egress).
Range: mbs=0 to 4194304 bytes; cbs=0 to 4194304 bytes Note: mbs=0 prevents
any traffic from being forwarded. Default: mbs=10ms of traffic or 64KB if
PIR=max; cbs=10ms of traffic or 64KB if CIR=max"
So the default setting is that they have a 10ms buffer and if a packet is
trying to be inserted into this buffer and it's 10ms full, then that
packet will instead be dropped.
They claimed most of their customers (ISPs) just went with this setting
and didn't change it.
Do we have a way to test this kind of setting from the outside, for
instance by sending a large chunk of data at wirespeed and then checking
the characteristics of the buffering/drop for this burst of packets at
receive side?
--
Mikael Abrahamsson email: swmike@swm.pp.se
next reply other threads:[~2019-04-11 10:38 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-11 10:38 Mikael Abrahamsson [this message]
2019-04-11 12:45 ` Sebastian Moeller
2019-04-11 17:33 ` Sebastian Moeller
2019-04-11 17:54 ` Jonathan Morton
2019-04-11 18:00 ` Holland, Jake
2019-04-11 18:28 ` Jonathan Morton
2019-04-11 23:56 ` Holland, Jake
2019-04-12 0:37 ` Jonathan Morton
2019-04-12 0:45 ` Holland, Jake
2019-04-12 9:47 ` Mikael Abrahamsson
2019-04-11 18:02 ` Jan Ceuleers
2019-04-11 18:27 ` Luca Muscariello
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