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182 posts

Master Geek

#196838 14-Jun-2016 20:01
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Hi there,


Recently switched over to Bigpipe and seem to be struggling with slow connectivity, which I think may be related to my settings on the edgerouter lite. 


Does anyone have a standard bigpipe ERL config to share? I know Michaelmurfy uses vlan tagging, but are there others that use the ERL without vlan tagging? What MTU settings do you use?

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29286 posts

Uber Geek

Biddle Corp
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  #1571959 14-Jun-2016 20:57
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MTU settings will need to be set to what the ISP supports - it's not a number you make up. In 99% of cases an ISP supports 1492 via PPPoA or PPPoE. Some ISP's support 1500. You'd need to check what BigPipe supports as it's maximum.









306 posts

Ultimate Geek

Lifetime subscriber

  #1571997 14-Jun-2016 22:06
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Shouldn't have to stuff around during with MTU. Basically upgrade the firmware if you haven't. Reset the configuration and follow instructions to set up the ppoe interface.


9637 posts

Uber Geek

Lifetime subscriber

  #1572043 15-Jun-2016 00:00
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The correct MTU in BigPipes case is 1492 on the PPPoE interface, 1500 internally.


182 posts

Master Geek

  #1574756 16-Jun-2016 01:22
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michaelmurfy: The correct MTU in BigPipes case is 1492 on the PPPoE interface, 1500 internally.






Thanks - that makes sense - it seems to be working better now.

155 posts

Master Geek

  #1577611 21-Jun-2016 12:00
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1) enable MSS clamping on the ERL if you haven't already


2) in the future, if you suspect an MTU issue, test by changing it on your PC. MTU is end-to-end and should be configured correctly on hosts (not routers, but that helps too).


182 posts

Master Geek

  #1577636 21-Jun-2016 12:57
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Yes thanks - I've had TCP clamped at 1452, and it can make a difference to browsing speeds and downloads. 


I'm still investigating the slow speed test results with Bigpipe, but the first set of results that I was looking into in this thread was related to my offloading settings rather than the clamping.







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