From rlhamil at smart.net Wed Oct 19 06:44:56 2016 From: rlhamil at smart.net (Richard L. Hamilton) Date: Wed, 19 Oct 2016 09:44:56 -0400 Subject: [linux-sparc-users] why can't I connect to a SPARC Linux LDOM via IPv6? Message-ID: <32EA1F81-5F17-4119-997A-1E87E4715EB5@smart.net> IPv4 works fine; and I can ping (ping6 from Mac or Linux) the IPv6 address from another system, but I can't e.g. ssh in via the IPv6 address, which given that Macs don't have a way to configure IPv4 vs IPv6 preference, is annoyingly slow to time out. That's regardless of the OS that I'm coming from...although I _can_ ssh back locally to the (either global or link-level) IPv6 address. AFAIK, I turned the iptables firewall off, there's nothing in /etc/hosts.deny that should account for it, etc. What am I missing? mysteriously frustrated... :-) From kpolberg at kpolberg.net Wed Oct 19 07:33:11 2016 From: kpolberg at kpolberg.net (kpolberg at kpolberg.net) Date: Wed, 19 Oct 2016 16:33:11 +0200 Subject: [linux-sparc-users] why can't I connect to a SPARC Linux LDOM via IPv6? In-Reply-To: <32EA1F81-5F17-4119-997A-1E87E4715EB5@smart.net> References: <32EA1F81-5F17-4119-997A-1E87E4715EB5@smart.net> Message-ID: <5ff6598f-3aba-b6fb-bd65-80a2f7b62306@kpolberg.net> On 10/19/2016 03:44 PM, Richard L. Hamilton wrote: > IPv4 works fine; and I can ping (ping6 from Mac or Linux) the IPv6 address from another system, but I can't e.g. ssh in via the IPv6 address, which given that Macs don't have a way to configure IPv4 vs IPv6 preference, is annoyingly slow to time out. That's regardless of the OS that I'm coming from...although I _can_ ssh back locally to the (either global or link-level) IPv6 address. > > AFAIK, I turned the iptables firewall off, there's nothing in /etc/hosts.deny that should account for it, etc. > > What am I missing? > > > mysteriously frustrated... :-) > > > > _______________________________________________ > linux-sparc-users mailing list > linux-sparc-users at oss.oracle.com > https://oss.oracle.com/mailman/listinfo/linux-sparc-users > Hi, Could it be that you are hitting the same problem I had? https://lists.debian.org/debian-sparc/2016/04/msg00073.html -kp From alexandre.chartre at oracle.com Wed Oct 19 08:02:28 2016 From: alexandre.chartre at oracle.com (Alexandre Chartre) Date: Wed, 19 Oct 2016 17:02:28 +0200 Subject: [linux-sparc-users] why can't I connect to a SPARC Linux LDOM via IPv6? In-Reply-To: <5ff6598f-3aba-b6fb-bd65-80a2f7b62306@kpolberg.net> References: <32EA1F81-5F17-4119-997A-1E87E4715EB5@smart.net> <5ff6598f-3aba-b6fb-bd65-80a2f7b62306@kpolberg.net> Message-ID: With LDoms vnet on Linux, we have seen some packets being dropped in some cases. The workaround was to turn tx-checksum-ip-generic off: # ethtool -K eth0 tx-checksum-ip-generic off The problem was due to Solaris vsw bug 22567785 (LDoms vswitch can drop packets bound for physical NIC using LSO). This bug has been fixed in Solaris. alex. On 10/19/2016 04:33 PM, kpolberg at kpolberg.net wrote: > > > On 10/19/2016 03:44 PM, Richard L. Hamilton wrote: >> IPv4 works fine; and I can ping (ping6 from Mac or Linux) the IPv6 address from another system, but I can't e.g. ssh in via the IPv6 address, which given that Macs don't have a way to configure IPv4 vs IPv6 preference, is annoyingly slow to time out. That's regardless of the OS that I'm coming from...although I _can_ ssh back locally to the (either global or link-level) IPv6 address. >> >> AFAIK, I turned the iptables firewall off, there's nothing in /etc/hosts.deny that should account for it, etc. >> >> What am I missing? >> >> >> mysteriously frustrated... :-) >> >> >> >> _______________________________________________ >> linux-sparc-users mailing list >> linux-sparc-users at oss.oracle.com >> https://oss.oracle.com/mailman/listinfo/linux-sparc-users >> > Hi, > > Could it be that you are hitting the same problem I had? > > https://lists.debian.org/debian-sparc/2016/04/msg00073.html > > -kp > > _______________________________________________ > linux-sparc-users mailing list > linux-sparc-users at oss.oracle.com > https://oss.oracle.com/mailman/listinfo/linux-sparc-users > From rlhamil at smart.net Wed Oct 19 08:16:34 2016 From: rlhamil at smart.net (Richard L. Hamilton) Date: Wed, 19 Oct 2016 11:16:34 -0400 Subject: [linux-sparc-users] why can't I connect to a SPARC Linux LDOM via IPv6? In-Reply-To: References: <32EA1F81-5F17-4119-997A-1E87E4715EB5@smart.net> <5ff6598f-3aba-b6fb-bd65-80a2f7b62306@kpolberg.net> Message-ID: Thanks! That was it. Is that setting remembered by the OS, or does that command need to be put into an RC file? > On Oct 19, 2016, at 11:02, Alexandre Chartre wrote: > > > With LDoms vnet on Linux, we have seen some packets being dropped in some cases. > The workaround was to turn tx-checksum-ip-generic off: > > # ethtool -K eth0 tx-checksum-ip-generic off > > The problem was due to Solaris vsw bug 22567785 (LDoms vswitch can drop > packets bound for physical NIC using LSO). This bug has been fixed in > Solaris. > > alex. > > > On 10/19/2016 04:33 PM, kpolberg at kpolberg.net wrote: >> >> >> On 10/19/2016 03:44 PM, Richard L. Hamilton wrote: >>> IPv4 works fine; and I can ping (ping6 from Mac or Linux) the IPv6 address from another system, but I can't e.g. ssh in via the IPv6 address, which given that Macs don't have a way to configure IPv4 vs IPv6 preference, is annoyingly slow to time out. That's regardless of the OS that I'm coming from...although I _can_ ssh back locally to the (either global or link-level) IPv6 address. >>> >>> AFAIK, I turned the iptables firewall off, there's nothing in /etc/hosts.deny that should account for it, etc. >>> >>> What am I missing? >>> >>> >>> mysteriously frustrated... :-) >>> >>> >>> >>> _______________________________________________ >>> linux-sparc-users mailing list >>> linux-sparc-users at oss.oracle.com >>> https://oss.oracle.com/mailman/listinfo/linux-sparc-users >>> >> Hi, >> >> Could it be that you are hitting the same problem I had? >> >> https://lists.debian.org/debian-sparc/2016/04/msg00073.html >> >> -kp >> >> _______________________________________________ >> linux-sparc-users mailing list >> linux-sparc-users at oss.oracle.com >> https://oss.oracle.com/mailman/listinfo/linux-sparc-users >> > > _______________________________________________ > linux-sparc-users mailing list > linux-sparc-users at oss.oracle.com > https://oss.oracle.com/mailman/listinfo/linux-sparc-users > From alexandre.chartre at oracle.com Thu Oct 20 01:31:24 2016 From: alexandre.chartre at oracle.com (Alexandre Chartre) Date: Thu, 20 Oct 2016 10:31:24 +0200 Subject: [linux-sparc-users] why can't I connect to a SPARC Linux LDOM via IPv6? In-Reply-To: References: <32EA1F81-5F17-4119-997A-1E87E4715EB5@smart.net> <5ff6598f-3aba-b6fb-bd65-80a2f7b62306@kpolberg.net> Message-ID: ethtool commands are not persistent upon reboot, so you will an RC script. If you use /etc/sysconfig/network-scripts/ifcfg-eth0 then you can specify ethtool options in ETHTOOL_OPTS, e.g.: ETHTOOL_OPTS="tx-checksum-ip-generic off" alex. On 10/19/2016 05:16 PM, Richard L. Hamilton wrote: > Thanks! That was it. Is that setting remembered by the OS, or does that command need to be put into an RC file? > > >> On Oct 19, 2016, at 11:02, Alexandre Chartre wrote: >> >> >> With LDoms vnet on Linux, we have seen some packets being dropped in some cases. >> The workaround was to turn tx-checksum-ip-generic off: >> >> # ethtool -K eth0 tx-checksum-ip-generic off >> >> The problem was due to Solaris vsw bug 22567785 (LDoms vswitch can drop >> packets bound for physical NIC using LSO). This bug has been fixed in >> Solaris. >> >> alex. >> >> >> On 10/19/2016 04:33 PM, kpolberg at kpolberg.net wrote: >>> >>> >>> On 10/19/2016 03:44 PM, Richard L. Hamilton wrote: >>>> IPv4 works fine; and I can ping (ping6 from Mac or Linux) the IPv6 address from another system, but I can't e.g. ssh in via the IPv6 address, which given that Macs don't have a way to configure IPv4 vs IPv6 preference, is annoyingly slow to time out. That's regardless of the OS that I'm coming from...although I _can_ ssh back locally to the (either global or link-level) IPv6 address. >>>> >>>> AFAIK, I turned the iptables firewall off, there's nothing in /etc/hosts.deny that should account for it, etc. >>>> >>>> What am I missing? >>>> >>>> >>>> mysteriously frustrated... :-) >>>> >>>> >>>> >>>> _______________________________________________ >>>> linux-sparc-users mailing list >>>> linux-sparc-users at oss.oracle.com >>>> https://oss.oracle.com/mailman/listinfo/linux-sparc-users >>>> >>> Hi, >>> >>> Could it be that you are hitting the same problem I had? >>> >>> https://lists.debian.org/debian-sparc/2016/04/msg00073.html >>> >>> -kp >>> >>> _______________________________________________ >>> linux-sparc-users mailing list >>> linux-sparc-users at oss.oracle.com >>> https://oss.oracle.com/mailman/listinfo/linux-sparc-users >>> >> >> _______________________________________________ >> linux-sparc-users mailing list >> linux-sparc-users at oss.oracle.com >> https://oss.oracle.com/mailman/listinfo/linux-sparc-users >> >