nanog mailing list archives
Re: pay.gov and IPv6
From: Mark Andrews <marka () isc org>
Date: Mon, 21 Nov 2016 11:26:34 +1100
In message <1479686835.13553.4.camel () ns five-ten-sg com>, Carl Byington writes:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On Sun, 2016-11-20 at 10:51 +0100, JORDI PALET MARTINEZ wrote:For example, you will not get this working if you have a lower MTU than 1.500, which is quite normal, not just for tunnels, but also because the PPP/others encapsulation in many access links:http://diskmakerx.com/curl -6 -v http://diskmakerx.com/ That works here via an he.net tunnel. Perhaps 1and1 fixed something.
And the advertised MSS was what? On my box I'm seeing 1220 for IPv6 compared with 1460 for IPv4. 1220 shouldn't see PMTU problems. 1460 on the other hand will cause problems as more clients are forced behind IPv4 as a service links. 11:14:50.056215 IP 172.30.42.121.52280 > 217.160.0.214.80: Flags [S], seq 2115844511, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 538455715 ecr 0,sackOK,eol], length 0 11:14:50.137770 IP6 2001:470:a001:4:c00d:3d8c:14e7:6de3.52282 > 2001:8d8:100f:f000::2d5.80: Flags [S], seq 4181372812, win 65535, options [mss 1220,nop,wscale 4,nop,nop,TS val 538455793 ecr 0,sackOK,eol], length 0 Mark
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-- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka () isc org
Current thread:
- Re: pay.gov and IPv6, (continued)
- Re: pay.gov and IPv6 Matthew Kaufman (Nov 16)
- Re: pay.gov and IPv6 Lee (Nov 17)
- Re: pay.gov and IPv6 Matthew Kaufman (Nov 17)
- Re: pay.gov and IPv6 Lee (Nov 17)
- Re: pay.gov and IPv6 Carl Byington (Nov 17)
- Re: pay.gov and IPv6 Lee (Nov 18)
- Re: pay.gov and IPv6 Carl Byington (Nov 18)
- Re: pay.gov and IPv6 JORDI PALET MARTINEZ (Nov 18)
- Re: pay.gov and IPv6 JORDI PALET MARTINEZ (Nov 20)
- Re: pay.gov and IPv6 Carl Byington (Nov 20)
- Re: pay.gov and IPv6 Mark Andrews (Nov 20)
- Re: pay.gov and IPv6 Carl Byington (Nov 20)
- Re: pay.gov and IPv6 JORDI PALET MARTINEZ (Nov 20)
- Re: pay.gov and IPv6 joel jaeggli (Nov 21)
- Re: pay.gov and IPv6 Sean Donelan (Nov 18)
- Re: pay.gov and IPv6 Florian Weimer (Nov 18)
- Re: pay.gov and IPv6 Mark Andrews (Nov 18)