Hi illumos.

Hi!

Good day.

hey there, I'm trying to setup a point-to-point link between my OmniOS server and my router using a /31 subnet,

and I get "ipadm: Could not create address: Can't assign requested address"

say I'm trying to use the 100.100.100.100/31 pair, my command is as follows

pfexec ipadm create-addr -T static -a 100.100.100.101/31 bge1/v4

could it be that OmniOS does not support /31 subnets? I was using a /26 with no issue before that

also tried the following:

pfexec ipadm create-addr -T static -a local=100.100.100.101,remote=100.100.100.100 bge1/v4

which outputs "ipadm: Could not create address: Invalid argument provided"

I'm not sure many ethernet systems will like a /31 mask, you might want a /30 giving 4 addresses (100 is netnum, 101, 102 are useable, 103 is broadcast)

well, RFC 3021 <datatracker.ietf.org/doc/html/rfc3021> is already 25 years old,

It's an ipadm bug: illumos.org/issues/13232

→ BUG 13232: Add support for IPv4/31 or IPv6/127 (New)

The kernel and ohters support using /31s.

and I'm using point-to-point links on FreeBSD & Linux with no issue, so I assumed Illumos would support it as well

oh, thanks rmustacc

Yeah, point-to-point IPv4 stuff works fine once you get it set up.

it looks like you just need to use a different syntax

to workaround the bug

Unfortunately, yes.

thanks yall, the syntax is a little convoluted and of course I fucked it up on first try, lol

will the "ifconfig 100.100.100.101 destination 100.100.100.100 netmask 255.255.255.255 up" resist rebooting the machine?

manually issued (command line) ifconfig is not persistant, if that's what you are asking.

indeed, that was my question, since I cannot use ipadm for that specific scenario

ipadm does show the point-to-point link now though

where shall I add the custom ifconfig command so it survives a reboot, may I ask?

I'm obviously new to Illumos, migrating away from Linux for VM management

from earlier did you try 'ipadm create-addr -T static -a local=100.100.100.101 -a remote=100.100.100.100 bge1/v4' (two separate -a options, not -a xxx,yyy) ?

veg: bug 13232 linked above suggests trying: ipadm create-addr -T static -a local=192.168.1.5 -a remote=192.168.1.4 e1000g0/v4p2p

which would be persistent

yes, I did try the 2 -a options, with no luck

(also, if you already have bge4/v4 address, that will generate an error)

the bug report also had the local & remote addresses reversed in the ifconfig example

-a local -a remote & -a local=xx,remote=xx give different error messages but neither works, unfortunately

does ipadm show an existing bge1/v4 entry?

no, there was none

If you are testing after issuing the ifconfig then it will fail because the device is configured. You have to clear the config before trying new ipadm commands.

I ha/clean

woops

oi

looks like other people had similar experiences with the ipadm command, nomad : reddit.com/r/illumos/comments/y53yy0/rfc_3021_31_network_support

today I learned there's an illumos reddit?

it's been there for a while...

Yeah, I keep an occasional eye on it and try to dampen any misinformation

there's even a discord too (if papertigers ever gets around to finishing it :P)

gosh

there's a reddit for everything! :D

[illumos-gate] 11989 DHCP client support for "Interface MTU" option -- Joshua M. Clulow <josh⊙so>

is there a dcmd that'll show you how long a sleeping kernel thread has been sleeping?

or would maybe comparing kthread_t->t_hrtime to 'now' on a sleeping kthread show that?

jbk: I think "::thread -d" gives you the dispatcher state, including the SWITCH column which seems like a time

might be worth looking at how that works

the comment in thread.h seems like enough?

the SWITCH column is ... different

I assume that's the low-res version of what the hrtime is hr of

ah

hah

figures there's an XXX command for the exact thing I was looking at