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Date:      Mon, 31 Jul 2017 20:13:31 +0200 (CEST)
From:      =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no>
To:        Mike Tancsa <mike@sentex.net>
Cc:        freebsd-questions <freebsd-questions@freebsd.org>
Subject:   Re: default route via SLAAC not working ?
Message-ID:  <alpine.BSF.2.21.1707312008360.1133@mail.fig.ol.no>
In-Reply-To: <d4435f2b-d2bc-bb28-e03e-832ad4dd5c14@sentex.net>
References:  <96b09a19-01e1-e182-e9c0-d1526a12373f@sentex.net> <alpine.BSF.2.21.1707311727060.1133@mail.fig.ol.no> <3e0e0362-d8c8-5f85-46dc-f4e103f78fc2@sentex.net> <alpine.BSF.2.21.1707311753200.1133@mail.fig.ol.no> <d4435f2b-d2bc-bb28-e03e-832ad4dd5c14@sentex.net>

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On Mon, 31 Jul 2017 13:47-0400, Mike Tancsa wrote:

> On 7/31/2017 11:54 AM, Trond Endrestøl wrote:
> >>
> >> Is there a way to manually force a solicitation by the interface ?
> > 
> > rtsol(8), e.g. rtsol ue0 or rtsol -a.
> > 
> 
> Thanks!  A little further. It seems at bootup time, I do get a default
> route installed. But then it goes away
> 
> % netstat -nr6 | head -6
> Routing tables
> 
> Internet6:
> Destination                       Gateway                       Flags
>    Use    Mtu    Netif Expire
> ::/96                             ::1                           UGRS
>      0  16384      lo0
> default                           fe80::a671:74ff:fe2b:c137%ue0 UG
>      3   1460      ue0
> 
> % ping6 -c 2 www.freebsd.org
> PING6(56=40+8+8 bytes) 2605:8d80:6e3:f899:e5b:8fff:fe27:9a64 -->
> 2001:1900:2254:206a::50:0
> 16 bytes from 2001:1900:2254:206a::50:0, icmp_seq=0 hlim=50 time=382.217 ms
> 16 bytes from 2001:1900:2254:206a::50:0, icmp_seq=1 hlim=50 time=149.969 ms
> 
> --- wfe0.ysv.freebsd.org ping6 statistics ---
> 2 packets transmitted, 2 packets received, 0.0% packet loss
> round-trip min/avg/max/std-dev = 149.969/266.093/382.217/116.124 ms
> % ifconfig ue0
> ue0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
> mtu 1500
>         ether 0c:5b:8f:27:9a:64
>         hwaddr 0c:5b:8f:27:9a:64
>         inet6 fe80::e5b:8fff:fe27:9a64%ue0 prefixlen 64 scopeid 0x10
>         inet6 2605:8d80:6e3:f899:e5b:8fff:fe27:9a64 prefixlen 64 autoconf
>         inet 192.168.8.100 netmask 0xffffff00 broadcast 192.168.8.255
>         nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
> 
> 
> About 6 min after boot up, the kernel (pid 0?) deletes the default route
> for whatever reason (output from route monitor)
> 
> got message of size 312 on Mon Jul 31 13:28:31 2017
> RTM_DELETE: Delete Route: len 312, pid: 0, seq 0, errno 0,
> flags:<GATEWAY,DONE>
> locks:  inits:
> sockaddrs: <DST,GATEWAY,NETMASK,IFP,IFA>
>  default fe80::a671:74ff:fe2b:c137%ue0 default ue0:c.5b.8f.27.9a.64
> fe80::e5b:8fff:fe27:9a64%ue0

That's strange. I've never seen such behaviour before.
Maybe a packet capture can provide more clues.

-- 
Trond.
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Date: Mon, 31 Jul 2017 15:33:24 -0400
Subject: Re: Unable to mount USB Flash memory created on CentOS
From: "James B. Byrne" <byrnejb@harte-lyne.ca>
To: "Polytropon" <freebsd@edvax.de>
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I put one of the subject usb flash drives into a CentOS-6 box and ran
mke2fs -n on the partition.  This gave me the backup superblock
addresses.

# mke2fs -n /dev/sdb
mke2fs 1.41.12 (17-May-2010)
/dev/sdb is entire device, not just one partition!
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
122400 inodes, 489216 blocks
24460 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=503316480
15 block groups
32768 blocks per group, 32768 fragments per group
8160 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912

Which information I used to run fsck:

# e2fsck -b 32768 /dev/sdb1
e2fsck 1.41.12 (17-May-2010)
CA_HLL_2016_BKUP was not cleanly unmounted, check forced.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences:  -(73728--81919) . . .
. . .
97895--97897) -97900 -97904 -97907 -(97911--97912) -97914
-(97916--97917) -(97919--97920)
Fix<y>? yes

Free inodes count wrong for group #0 (8149, counted=5908).
Fix<y>? yes

Directories count wrong for group #0 (2, counted=219).
Fix<y>? yes

Free inodes count wrong for group #1 (8160, counted=8148).
Fix<y>? yes

Directories count wrong for group #1 (0, counted=12).
Fix<y>? yes

Free inodes count wrong (122389, counted=120136).
Fix<y>? yes


CA_HLL_2016_BKUP: ***** FILE SYSTEM WAS MODIFIED *****
CA_HLL_2016_BKUP: 2264/122400 files (0.0% non-contiguous),
20686/489141 blocks

This has not repaired whatever is keeping the Mate desktop from
mounting the device.  But as that is a matter of convenience rather
than necessity I will simply deal with unit through the command line.

Thank you for all tghehelp.

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