Folks,
I am planning to give a talk about Bufferbloat to the local Linux User Group
next week (http://dlslug.org). All this traffic on the list is fantastic,
because it gives me a lot of background on the current state of bufferbloat.
I've pulled together a bunch of general questions about CeroWrt that I would
like to be able to cover if they come up:
- Is it true that the latest CeroWrt is Sugarland 3.3.8-26 from mid-September?
(My router is using this build - r33460.)
- I see the "QoS" item in the Network tab of the web GUI. Is this important for
Sugarland? Or does some other router configuration take care of this now?
- What's the relationship between the QoS GUI item above and the debloat.sh and
simple_qos.sh scripts that have been mentioned on this list? What's the best
practice here for getting a router up and running?
- I can see how the CeroWrt de-bloating algorithms help protect against bad
latency when I'm *uploading* big files. I'm not sure whether using CeroWrt with
its CoDel/FQ/SFQ/etc. helps when I'm downloading big files, though. What can I
say about this?
- I believe the default DNS server in Sugarland is dnsmasq, not bind. Is DNSSEC
enabled by default? Also: there's a report (Bug #411) that says that DNS is
leaking internal names to the outside world. What's the best advice for closing
this? ("list notinterface 'ge00'" is one recommendation…)
- I've been assembling information about the various de-bloating techniques
implemented in CeroWrt. It seems that Infoblox has recently reorganized their
blogs, and the links published earlier this week have all broken. Here are
updates:
http://www.infoblox.com/community/blog/application-analysis-using-tcp-retransmissions-part-1
http://www.infoblox.com/community/blog/application-analysis-using-tcp-retransmissions-part-2
http://www.infoblox.com/community/blog/router-buffer-tuning
http://www.infoblox.com/community/blog/rethinking-interface-error-reports
My plan is to give a little of the science behind bufferbloat mitigation and
also put in a plug for CeroWrt. Any topics I haven't already mentioned that I
should? Thanks!
Rich Brown
Hanover, NH USA
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