Migrating NFS to IPv6
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Migrating NFS to IPv6| NeoAmsterdam |
 Posted: Jul 16 2011, 07:23 AM
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 SLF Geek  Group: Members Posts: 155 Member No.: 181 Joined: 16-May 11  |
Okay... SL 6 and NFS: it works under IPv4. Too well, actually, but I need to use IPv6*. So far I can SSH to the SL/NFS box with avahi (I don't actually know the SL/NFS box's IP address  ), but trying to mount the NFS share just won't work. I think the problem has to do with exportfs not understanding IPv6 address formats and netmasks in /etc/exports.Here's a watered-down version of the working [IPv4] configuration in /etc/exports:
The goal is to do the same, but with IPv6 addresses ("fe08::::::0/16"?).
Has anyone managed to set up NFS with IPv6? How do I write my IPv6 addresses and netmask in /etc/exports? And, since I've broached the subject, is there any real reason why to migrate to IPv6 on a local network (i.e.: is the throughput any "better")? * That's because the SL/NFS box is directly connected to another machine via crossover cable at gigabit, because that machine is able to find the SL/NFS box over IPv6 but not IPv4, and because I don't have a gigabit router, and I don't feel like wasting my whole weekend on transferring 2TB of data (base 1024, of course  ) |
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| redman |
Posted: Jul 16 2011, 09:38 AM
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 SLF Admin Group: Admins Posts: 1705 Member No.: 2 Joined: 8-April 11 |
I have no experience with IPv6 except that is can be a pain to set up.
Especially since its structure is different than that from IPv4. I suggest first doing some research on the new structure and what that means for your LAN. -------------------- What is SL? - Forum Rules - Info on 3rd Party Repos - How to post images - How to post large text / config files
Desktop: ASUS P5QPL-AM, Intel Dual-Core E6500, 4GB DDR2, ASUS GeForce GT 430 1GB, SL6.4 x86_64 Laptop: ASUS X58L, Intel Dual-Core T3200, 3GB DDR2, Intel GMA X3100, RHEL6.4 x86_64 Test box: Intel S5000PSL, 2x Intel Xeon E5310, 8GB ECC DDR2 FB-DIMM, ASUS GeForce GT 220 1GB, SL6.4 x86_64 |
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| NeoAmsterdam |
Posted: Jul 16 2011, 06:16 PM
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SLF Geek Group: Members Posts: 155 Member No.: 181 Joined: 16-May 11 |
I always research before posting
It keeps me from asking stupid questions and looking a fool for it. But when the search results for "NFS", "IPv6", and "won't work" are all posts you've made asking why NFS over IPv6 won't work...  well, Google stops being a friend.All the documentation I've read says that NFS should work over IPv6 no differently than IPv4 (Yeah, right  ). I figured that, given our savvy SL users  , someone here might have been through this before.In the meantime I'm shuttling the data over SSH.  I've yet to see the speedometer surpass the 24MB/s mark, but at least I'm getting there faster than I would have at 100Base-T... |
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| joutlan |
Posted: Jul 16 2011, 07:26 PM
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 SLF Founder Group: Admins Posts: 1152 Member No.: 1 Joined: 8-April 11 |
I'll bump it as someone might be able to help you here. Didn't I hear that Google was migrating to IPv6? .........
 -------------------- DΞLL Precision M6700: 17 inch NB//i7-quad w/USB 3.0, 16.0GB, Quadro K5000M 2.0GB DDR3, RGBLED //W8P64/Scientific Linux 6.4 x64
DΞLL Vostro 3350 Nirvana: 13 inch NB w/ IntelSSD// W8Px64 (Work;Games) Nexus 4 //Android |
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| helikaon |
Posted: Jul 17 2011, 04:27 AM
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 SLF Moderator Group: Moderators Posts: 516 Member No.: 4 Joined: 8-April 11 |
Hi,
well, i'm not gonna help on this one either, since i dont know how usage of IPv6 influences firewall settings (ports?), NFS settings (ports again), portmap...? too many variables here which i cant say .... cheers, -------------------- |
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| NeoAmsterdam |
Posted: Jul 17 2011, 08:08 PM
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SLF Geek Group: Members Posts: 155 Member No.: 181 Joined: 16-May 11 |
Yes - just in time for the "World IPv6 Day" non-event. Its implementation is mandated in the US for September 2012, if I remember correctly.
I've ruled out the firewall settings for ports and addresses - they're OK. Otherwise I wouldn't be able to SSH, VNC, or "see" the SL/NFS box over Avahi.
The prime suspect is /etc/exports: it works fine with dotted-quads but chokes on... uhm... "double-dotted octs". (There's gotta be a better name for IPv6-style addresses other than "a series of colons"... it conjures up a silly mental image  ) |
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| helikaon |
Posted: Jul 20 2011, 12:07 PM
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SLF Moderator Group: Moderators Posts: 516 Member No.: 4 Joined: 8-April 11 |
Do we have any update on the NFS? Curious ...
 BTW. I dont know if i asked already, its dumb basic question - what NFS version you use? Because i think the NFS 3 was buggy with this and only NFS 4 is supposed to have proper support over ipv6... cheers, -------------------- |
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| NeoAmsterdam |
Posted: Jul 20 2011, 08:29 PM
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SLF Geek Group: Members Posts: 155 Member No.: 181 Joined: 16-May 11 |
Not that I'm aware of.
Not a dumb question at all. In fact, very good question  I'm not sure.Hmm... let's see now... (clickety-clackety noises from the keyboard)... yum shows nfs-utils, nfs-utils-lib, & nfs4-acl-tools installed... (more clatter and a "hmm")... and rpcinfo lists versions 1-4... I'm going to infer that I've got NFS v4 running. Strange, though, that rpcinfo shows IPv4 and IPv6 running and some dotted-sextets - not dotted-quads Here's rpcinfo -s...
...and here's rpcinfo...
Hmm... Ideas?
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| helikaon |
Posted: Jul 21 2011, 03:04 PM
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SLF Moderator Group: Moderators Posts: 516 Member No.: 4 Joined: 8-April 11 |
Hi, if you need to find out the version you use i suggest
This should show you which version you actually use. Btw did you try to mount your nfs share directly on server itself? like
cheers, -------------------- |
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| NeoAmsterdam |
Posted: Jul 22 2011, 03:18 AM
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SLF Geek Group: Members Posts: 155 Member No.: 181 Joined: 16-May 11 |
man nfsstat is dated "7 Aug 2007", though that might be referring only to the documentation's date. I can't mount via localhost at the moment because /etc/exportfs prohibits traffic to anything except for 192.168.0.0/255.255.248.240 - a feature, not a flaw. The SL6 box dutifully responds "mount.nfs: access denied by server while mounting localhost:/srv/nfs".
Okay... so now you know where I've stashed the good stuff since FHS doesn't actually say "thou shalt serve NFS from these directories; thou shalt have no other shared directories but these." Finally, it's 90°F, 90% humidity, it's been a long day, I'd have to do some rewiring and generate some hefty traffic before I can nfsstat -o all -234, and I'm all worn out. I'll have to give it a go some other time. Thanks for the pointers, though. |
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