Hi, I'm seeing TCP ECN issues on the final hop to www.airnewzealand.co.nz. If there's someone from Air NZ on this list, you might want to look into it. I can provide traceroute / testing information if required. As an aside, I thought the "some routers break packets with ECN enabled" bug went away ages ago. Is anyone else seeing ECN related brokenness, or is it now SOP to disable ECN and leave it off? Daniel
On Tue, 2008-09-02 at 16:38 +1200, Daniel Lawson wrote:
I'm seeing TCP ECN issues on the final hop to www.airnewzealand.co.nz. If there's someone from Air NZ on this list, you might want to look into it. I can provide traceroute / testing information if required.
Yeah, this seems to have been the case for a while. I turned ECN on on my laptop about 6 months ago and had to set up my gateway at home to strip the bits for packets destined for Air NZ's prefix, otherwise it turned into a total black hole. Other than Air NZ I haven't hit any other ECN black holes I can think of. Cheers, -- Jasper Bryant-Greene Network Engineer, Unleash p: +64 21 129 9458 e: jasper(a)unleash.co.nz w: http://www.unleash.co.nz/ INOC-DBA: 38477
There have been hardware/software upgrades on the perimeter in the past few weeks. If you can let me know details I will investigate further. Thanks, Graeme -- Graeme Danielson Air New Zealand IT Networks tel:+64-9-3065268 mob:+64-21-611456 fax:+64-9-3065034 GMT+12 -----Original Message----- From: Daniel Lawson [mailto:daniel(a)meta.net.nz] Sent: Tuesday, 2 September 2008 4:38 p.m. To: nznog(a)list.waikato.ac.nz Subject: [nznog] Air New Zealand / ECN Hi, I'm seeing TCP ECN issues on the final hop to www.airnewzealand.co.nz. If there's someone from Air NZ on this list, you might want to look into it. I can provide traceroute / testing information if required. As an aside, I thought the "some routers break packets with ECN enabled" bug went away ages ago. Is anyone else seeing ECN related brokenness, or is it now SOP to disable ECN and leave it off? Daniel _______________________________________________ NZNOG mailing list NZNOG(a)list.waikato.ac.nz http://list.waikato.ac.nz/mailman/listinfo/nznog Please consider the environment before printing this e-mail ____________________________________________________________________ CAUTION - This message may contain privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited. If you have received this message in error please notify Air New Zealand immediately. Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of Air New Zealand. _____________________________________________________________________ For more information on the Air New Zealand Group, visit us online at http://www.airnewzealand.com _____________________________________________________________________
Thanks Graeme Will send some details offlist.
There have been hardware/software upgrades on the perimeter in the past few weeks. If you can let me know details I will investigate further. Thanks, Graeme
-- Graeme Danielson Air New Zealand IT Networks tel:+64-9-3065268 mob:+64-21-611456 fax:+64-9-3065034 GMT+12
-----Original Message----- From: Daniel Lawson [mailto:daniel(a)meta.net.nz] Sent: Tuesday, 2 September 2008 4:38 p.m. To: nznog(a)list.waikato.ac.nz Subject: [nznog] Air New Zealand / ECN
Hi,
I'm seeing TCP ECN issues on the final hop to www.airnewzealand.co.nz. If there's someone from Air NZ on this list, you might want to look into it. I can provide traceroute / testing information if required.
As an aside, I thought the "some routers break packets with ECN enabled" bug went away ages ago. Is anyone else seeing ECN related brokenness, or is it now SOP to disable ECN and leave it off?
Daniel _______________________________________________ NZNOG mailing list NZNOG(a)list.waikato.ac.nz http://list.waikato.ac.nz/mailman/listinfo/nznog Please consider the environment before printing this e-mail ____________________________________________________________________ CAUTION - This message may contain privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited. If you have received this message in error please notify Air New Zealand immediately. Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of Air New Zealand. _____________________________________________________________________ For more information on the Air New Zealand Group, visit us online at http://www.airnewzealand.com _____________________________________________________________________
participants (3)
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Daniel Lawson -
Danielson, Graeme -
Jasper Bryant-Greene