[SOLVED] NO LAN (wired ethernet) IPv6 (but with WiFi all is ok)

erdoukki · September 26, 2020, 6:53am

root@LPM:~# sysctl net.ipv6.conf.lan0.disable_ipv6
net.ipv6.conf.lan0.disable_ipv6 = 1
root@LPM:~# sysctl net.ipv6.conf.lan1.disable_ipv6
net.ipv6.conf.lan1.disable_ipv6 = 1

Why my LAN ports are disabled on ipv6 ?

root@LPM:~# sysctl -w net.ipv6.conf.lan0.disable_ipv6=0
net.ipv6.conf.lan0.disable_ipv6 = 0
root@LPM:~# sysctl -w net.ipv6.conf.lan1.disable_ipv6=0
net.ipv6.conf.lan1.disable_ipv6 = 0

08:53:13.525852   M 00:07:cb:97:6b:a9 ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::207:cbff:fe97:6ba9 > ff02::1:ff5b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): 00:07:cb:97:6b:a9
08:53:13.593360 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fdf9:42b:7194:10::1 > ff02::1:ff5b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
08:53:13.593452 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fdf9:42b:7194:10::1 > ff02::1:ff5b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
08:53:13.593540 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fdf9:42b:7194:10::1 > ff02::1:ff5b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
08:53:13.593719 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fdf9:42b:7194:10::1 > ff02::1:ff5b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
08:53:13.593773 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fdf9:42b:7194:10::1 > ff02::1:ff5b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
08:53:13.593819 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fdf9:42b:7194:10::1 > ff02::1:ff5b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
08:53:13.593864 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fdf9:42b:7194:10::1 > ff02::1:ff5b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
08:53:13.593890 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fdf9:42b:7194:10::1 > ff02::1:ff5b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
08:53:14.623636  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 112: (flowlabel 0x036a5, hlim 64, next-header ICMPv6 (58) payload length: 56) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable address 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
08:53:14.623865  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 112: (flowlabel 0x036a5, hlim 64, next-header ICMPv6 (58) payload length: 56) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable address 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
08:53:14.624056  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 112: (flowlabel 0x036a5, hlim 64, next-header ICMPv6 (58) payload length: 56) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable address 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
08:53:28.368288  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 231: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 175) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 46134
08:53:32.226508  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 221: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 165) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 3125
08:53:34.220113  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 253: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 197) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 7754
08:53:39.063567  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 220: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 164) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 44397
08:53:51.924764  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 191: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 135) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 55692
08:53:53.325987  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 187: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 131) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 42200
08:53:54.081715  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 211: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 155) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 18973
08:53:54.174474  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 216: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 160) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 46809
08:53:54.498833  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 168: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 112) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 18314
08:53:55.004269  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 200: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 144) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 33269
08:53:55.894064  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 166: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 110) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 60962
08:53:55.899478  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 178: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 122) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 63227
08:53:57.040320  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 171: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 115) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 65258
08:53:57.044988  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 183: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 127) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 26948
08:53:58.364613  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 200: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 144) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 20196
08:53:58.622369  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 203: (flowlabel 0xc5b12, hlim 64, next-header ICMPv6 (58) payload length: 147) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 9665

same, still no success on wired lan ipv6 from my Ubuntu...

erdoukki · September 26, 2020, 7:33am

root@LPM:~# service network restart`

after restarting network, lan0 and lan1 come back to disabled on ipv6...

root@LPM:~# sysctl net.ipv6.conf.lan1.disable_ipv6
net.ipv6.conf.lan1.disable_ipv6 = 1

vgaetera · September 26, 2020, 8:43am

This is normal for bridge slave interfaces.

trendy · September 26, 2020, 5:18pm

Nothing interesting really captured here. You ran it only for 20", so did you really reconnect a new host in that time?
Any new host on IPv6 should send out a Router Solicitation and a DHCPv6 solicit. The second is seen in the second capture lines 9 and 10, which by they way go answered.

Again, no interesting packets captured. Some neighbor solicitations, which don't make too much sense as the private IPv6 is asking for the host which has a public IP. And some destination unreachables.
Can this Ubuntu connect over wireless correctly?

erdoukki · September 26, 2020, 5:44pm

ok, thanks

erdoukki · September 26, 2020, 5:44pm

okay, will do a longer tcpdump, and post it onto my GITHUB... (oversized for here)...

erdoukki · September 26, 2020, 5:56pm

yes... this is a latest ubuntu, and only wifi get ipv6 with it, no wired...

I have done some tests with wired espressobin (openwrt) and I got also no ipv6 with it...
All my wifi devices, mainly smartphones, got ipv6

erdoukki · September 26, 2020, 6:01pm

github.com

erdoukki/vrac/blob/master/troubleshoot/tcpdump_ipv6.log

19:52:00.350976  In 00:00:00:00:00:00 ethertype IPv6 (0x86dd), length 231: (flowlabel 0x0c6b0, hlim 64, next-header ICMPv6 (58) payload length: 175) fdf9:42b:7194:10::1 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, destination unreachable, unreachable port, fdf9:42b:7194:10::1 udp port 14501
19:52:02.601797   P bc:44:34:f0:7b:27 ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::be44:34ff:fef0:7b27 > fe80::f2ad:4eff:fe08:aa5f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::f2ad:4eff:fe08:aa5f
	  source link-address option (1), length 8 (1): bc:44:34:f0:7b:27
19:52:02.601797  In bc:44:34:f0:7b:27 ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::be44:34ff:fef0:7b27 > fe80::f2ad:4eff:fe08:aa5f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::f2ad:4eff:fe08:aa5f
	  source link-address option (1), length 8 (1): bc:44:34:f0:7b:27
19:52:02.602043 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 80: (hlim 255, next-header ICMPv6 (58) payload length: 24) fe80::f2ad:4eff:fe08:aa5f > fe80::be44:34ff:fef0:7b27: [icmp6 sum ok] ICMP6, neighbor advertisement, length 24, tgt is fe80::f2ad:4eff:fe08:aa5f, Flags [router, solicited]
19:52:02.602064 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 80: (hlim 255, next-header ICMPv6 (58) payload length: 24) fe80::f2ad:4eff:fe08:aa5f > fe80::be44:34ff:fef0:7b27: [icmp6 sum ok] ICMP6, neighbor advertisement, length 24, tgt is fe80::f2ad:4eff:fe08:aa5f, Flags [router, solicited]
19:52:02.623362 Out f0:ad:4e:08:aa:5d ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::f2ad:4eff:fe08:aa5d > fe80::207:cbff:fe97:6ba9: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::207:cbff:fe97:6ba9
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5d
19:52:02.623390 Out f0:ad:4e:08:aa:5d ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::f2ad:4eff:fe08:aa5d > fe80::207:cbff:fe97:6ba9: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::207:cbff:fe97:6ba9
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5d
19:52:02.623929  In 00:07:cb:97:6b:a9 ethertype IPv6 (0x86dd), length 80: (hlim 255, next-header ICMPv6 (58) payload length: 24) fe80::207:cbff:fe97:6ba9 > fe80::f2ad:4eff:fe08:aa5d: [icmp6 sum ok] ICMP6, neighbor advertisement, length 24, tgt is fe80::207:cbff:fe97:6ba9, Flags [router, solicited]
19:52:02.672211  In 00:07:cb:97:6b:a9 ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::207:cbff:fe97:6ba9 > 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): 00:07:cb:97:6b:a9
19:52:02.673846 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 64: (flowlabel 0x8b877, hlim 255, next-header ICMPv6 (58) payload length: 8) fdf9:42b:7194:10::1 > 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4: [icmp6 sum ok] ICMP6, echo request, seq 0
19:52:02.673892 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 64: (flowlabel 0x8b877, hlim 255, next-header ICMPv6 (58) payload length: 8) fdf9:42b:7194:10::1 > 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4: [icmp6 sum ok] ICMP6, echo request, seq 0
19:52:02.675943   P bc:44:34:f0:7b:27 ethertype IPv6 (0x86dd), length 64: (hlim 64, next-header ICMPv6 (58) payload length: 8) 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, echo reply, seq 0
19:52:02.675943  In bc:44:34:f0:7b:27 ethertype IPv6 (0x86dd), length 64: (hlim 64, next-header ICMPv6 (58) payload length: 8) 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4 > fdf9:42b:7194:10::1: [icmp6 sum ok] ICMP6, echo reply, seq 0
19:52:02.713434 Out f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::f2ad:4eff:fe08:aa5f > 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:d9bd:53b:c95b:c7d4
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f

This file has been truncated. show original

erdoukki · September 26, 2020, 6:06pm

gerald@P3530:/media/gerald/EBINDEV/DEVEL/OWRT/master$ ip -6 address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eno2: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 state UP qlen 1000
    inet6 fe80::ccea:c5f2:3622:816f/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: wlo1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 state UP qlen 1000
    inet6 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f/64 scope global temporary dynamic 
       valid_lft 85967sec preferred_lft 85713sec
    inet6 2a01:e34:ec81:a4c0:bdfb:7202:64a7:f02b/64 scope global dynamic mngtmpaddr noprefixroute 
       valid_lft 85967sec preferred_lft 85967sec
    inet6 fe80::21e4:be5:f263:4bb6/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

on the ubuntu PC

trendy · September 26, 2020, 9:20pm

The Ubuntu en02 has link local ...816f address. However I am not able to see any packet captured containing this address soliciting for router or neighbor.
Can you try once again by filtering the mac address of the en02?
tcpdump -i br-lan -env '(ether host ...81:6f) and (icmp6 or udp port 547)'

erdoukki · September 27, 2020, 7:10am

tcpdump -i br-lan -env '(ether host 8c:04:ba:04:1e:ef) and (icmp6 or udp port 547)'

nothing from this tcpdump yet...
still dumping

erdoukki · September 27, 2020, 1:55pm

nothing logged in all the day !

trendy · September 27, 2020, 9:41pm

Either you have entered the wrong mac or the interface is not sending any icmp6 or dhcp6 packets.
I tested with one of my devices and this is what I got as soon as the interface came up.

root@magiatiko:[/]#tcpdump -i eth0.4 -env '(ether host 00:11:22:33:44:55) and (icmp6 or udp port 547)'
tcpdump: listening on eth0.4, link-type EN10MB (Ethernet), capture size 262144 bytes
23:34:23.272034 00:11:22:33:44:55 > 66:77:88:99:aa:bb, ethertype IPv6 (0x86dd), length 78: (hlim 255, next-header ICMPv6 (58) payload length: 24) :: > ff02::1:ff3b:ea4c: [icmp6 sum ok] ICMP6, neighbor solicitation, length 24, who has fe80::ffd0:a111:dfca:1234
23:34:24.273004 00:11:22:33:44:55 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::ffd0:a111:dfca:1234 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
          source link-address option (1), length 8 (1): 00:11:22:33:44:55
23:34:24.274804 dc:a6:32:11:22:44 > 00:11:22:33:44:55, ethertype IPv6 (0x86dd), length 270: (flowlabel 0x80417, hlim 255, next-header ICMPv6 (58) payload length: 216) fe80::ffd0:a111:dfca:beef > fe80::ffd0:a111:dfca:1234: [icmp6 sum ok] ICMP6, router advertisement, length 216
        hop limit 64, Flags [managed, other stateful], pref medium, router lifetime 1800s, reachable time 0ms, retrans timer 0ms
          source link-address option (1), length 8 (1): dc:a6:32:11:22:44
          mtu option (5), length 8 (1):  1492
          prefix info option (3), length 32 (4): 2101:dead:225:7500::/64, Flags [onlink, auto], valid time 7200s, pref. time 7200s
          prefix info option (3), length 32 (4): fd00:bbbb::/64, Flags [onlink, auto], valid time 7200s, pref. time 7200s
          route info option (24), length 24 (3):  2101:dead:225:7500::/56, pref=medium, lifetime=1800s
          route info option (24), length 24 (3):  fd00:bbbb::/48, pref=medium, lifetime=1800s
          rdnss option (25), length 40 (5):  lifetime 1800s, addr: fd00:bbbb::2 addr: fd00:bbbb::3
          dnssl option (31), length 24 (3):  lifetime 1800s, domain(s): mrv.
          advertisement interval option (7), length 8 (1):  600ms
23:34:24.832055 00:11:22:33:44:55 > 66:77:88:99:aa:bb, ethertype IPv6 (0x86dd), length 78: (hlim 255, next-header ICMPv6 (58) payload length: 24) :: > ff02::1:ff3b:ea4c: [icmp6 sum ok] ICMP6, neighbor solicitation, length 24, who has fd00:bbbb::eed0:9fff:fe3b:ea4c
23:34:24.962032 00:11:22:33:44:55 > 66:77:88:99:aa:bb, ethertype IPv6 (0x86dd), length 78: (hlim 255, next-header ICMPv6 (58) payload length: 24) :: > ff02::1:ff3b:ea4c: [icmp6 sum ok] ICMP6, neighbor solicitation, length 24, who has 2101:dead:225:7500:eed0:9fff:fe3b:ea4c
23:34:25.011779 00:11:22:33:44:55 > 35:35:f1:43:fd:1f, ethertype IPv6 (0x86dd), length 78: (hlim 255, next-header ICMPv6 (58) payload length: 24) :: > ff02::1:ff40:ed1f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 24, who has fd00:bbbb::1909:9295:c30:fd1f
23:34:25.222042 00:11:22:33:44:55 > 35:35:f1:43:fd:1f, ethertype IPv6 (0x86dd), length 78: (hlim 255, next-header ICMPv6 (58) payload length: 24) :: > ff02::1:ff40:ed1f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 24, who has 2101:dead:225:7500:1909:9295:c40:ed1f
23:34:27.781823 00:11:22:33:44:55 > 33:33:ff:00:00:03, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) fd00:bbbb::1909:9295:c40:ed1f > ff02::1:ff00:3: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fd00:bbbb::3
          source link-address option (1), length 8 (1): 00:11:22:33:44:55
23:34:28.501942 dc:a6:32:11:22:44 > 00:11:22:33:44:55, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::ffd0:a111:dfca:beef > 2101:dead:225:7500:1909:9295:c40:ed1f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2101:dead:225:7500:1909:9295:c40:ed1f
          source link-address option (1), length 8 (1): dc:a6:32:11:22:44
23:34:28.681797 00:11:22:33:44:55 > 33:33:ff:00:00:03, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) fd00:bbbb::1909:9295:c40:ed1f > ff02::1:ff00:3: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fd00:bbbb::3
          source link-address option (1), length 8 (1): 00:11:22:33:44:55
23:34:29.525935 dc:a6:32:11:22:44 > 00:11:22:33:44:55, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::ffd0:a111:dfca:beef > 2101:dead:225:7500:1909:9295:c40:ed1f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2101:dead:225:7500:1909:9295:c40:ed1f
          source link-address option (1), length 8 (1): dc:a6:32:11:22:44
23:34:29.525936 dc:a6:32:11:22:44 > 00:11:22:33:44:55, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::ffd0:a111:dfca:beef > fe80::ffd0:a111:dfca:1234: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::ffd0:a111:dfca:1234
          source link-address option (1), length 8 (1): dc:a6:32:11:22:44
23:34:29.527305 00:11:22:33:44:55 > dc:a6:32:11:22:44, ethertype IPv6 (0x86dd), length 78: (hlim 255, next-header ICMPv6 (58) payload length: 24) fe80::ffd0:a111:dfca:1234 > fe80::ffd0:a111:dfca:beef: [icmp6 sum ok] ICMP6, neighbor advertisement, length 24, tgt is fe80::ffd0:a111:dfca:1234, Flags [router, solicited]
23:34:30.549936 dc:a6:32:11:22:44 > 00:11:22:33:44:55, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::ffd0:a111:dfca:beef > 2101:dead:225:7500:1909:9295:c40:ed1f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2101:dead:225:7500:1909:9295:c40:ed1f
          source link-address option (1), length 8 (1): dc:a6:32:11:22:44
23:34:31.692435 00:11:22:33:44:55 > 33:33:ff:00:00:02, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) fd00:bbbb::1909:9295:c40:ed1f > ff02::1:ff00:2: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fd00:bbbb::2
          source link-address option (1), length 8 (1): 00:11:22:33:44:55
23:34:31.876091 00:11:22:33:44:55 > dc:a6:32:11:22:44, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) 2101:dead:225:7500:1909:9295:c40:ed1f > fe80::ffd0:a111:dfca:beef: [icmp6 sum ok] ICMP6, neighbor advertisement, length 32, tgt is 2101:dead:225:7500:1909:9295:c40:ed1f, Flags [router, solicited, override]
          destination link-address option (2), length 8 (1): 00:11:22:33:44:55
23:34:32.692073 00:11:22:33:44:55 > 33:33:ff:00:00:02, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) fd00:bbbb::1909:9295:c40:ed1f > ff02::1:ff00:2: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fd00:bbbb::2
          source link-address option (1), length 8 (1): 00:11:22:33:44:55
23:34:33.691962 00:11:22:33:44:55 > 33:33:ff:00:00:02, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) fd00:bbbb::1909:9295:c40:ed1f > ff02::1:ff00:2: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fd00:bbbb::2
          source link-address option (1), length 8 (1): 00:11:22:33:44:55
^C
18 packets captured
29 packets received by filter
0 packets dropped by kernel

erdoukki · September 28, 2020, 7:31am

I am trying with another espressobin board with OpenWRT Snapshot, and I get the same "silence" on my router/gateway box...

trendy · September 28, 2020, 1:38pm

If your host doesn't initiate the process to acquire the settings, nothing will happen.

erdoukki · September 28, 2020, 5:19pm

on the ubuntu side, I do a tcpdump :

19:18:02.450812 Out 8c:04:ba:04:1e:ef ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) :: > ff02::1:ff22:816f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::ccea:c5f2:3622:816f
	  unknown option (14), length 8 (1): 
	  0x0000:  a05e 3375 a561
19:18:03.802466 Out 8c:04:ba:04:1e:ef ethertype IPv6 (0x86dd), length 64: (flowlabel 0xb9271, hlim 255, next-header ICMPv6 (58) payload length: 8) fe80::ccea:c5f2:3622:816f > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 8
19:18:07.802914 Out 8c:04:ba:04:1e:ef ethertype IPv6 (0x86dd), length 64: (flowlabel 0xb9271, hlim 255, next-header ICMPv6 (58) payload length: 8) fe80::ccea:c5f2:3622:816f > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 8
19:18:11.802992 Out 8c:04:ba:04:1e:ef ethertype IPv6 (0x86dd), length 64: (flowlabel 0xb9271, hlim 255, next-header ICMPv6 (58) payload length: 8) fe80::ccea:c5f2:3622:816f > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 8
19:18:40.977475   P f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 64: (flowlabel 0xba72e, hlim 255, next-header ICMPv6 (58) payload length: 8) fdcf:3be:f9e0::1 > 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f: [icmp6 sum ok] ICMP6, echo request, seq 0
19:18:45.990628   P f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::f2ad:4eff:fe08:aa5f > 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
19:18:47.030634   P f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::f2ad:4eff:fe08:aa5f > 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
19:18:48.080660   P f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::f2ad:4eff:fe08:aa5f > 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f

then nothing more

erdoukki · September 28, 2020, 5:26pm

still on ubuntu, wifi activation tcpdump :

19:25:08.662953 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) :: > ff02::1:ff63:4bb6: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::21e4:be5:f263:4bb6
	  unknown option (14), length 8 (1): 
	  0x0000:  f5e7 a551 7ff7
19:25:09.802724 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 64: (flowlabel 0x07299, hlim 255, next-header ICMPv6 (58) payload length: 8) fe80::21e4:be5:f263:4bb6 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 8
19:25:09.834629   M f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 160: (flowlabel 0x3494e, hlim 255, next-header ICMPv6 (58) payload length: 104) fe80::f2ad:4eff:fe08:aa5f > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 104
	hop limit 64, Flags [none], pref medium, router lifetime 1800s, reachable time 0ms, retrans timer 0ms
	  prefix info option (3), length 32 (4): 2a01:e34:ec81:a4c0::/64, Flags [onlink, auto], valid time 86400s, pref. time 86400s
	  rdnss option (25), length 40 (5):  lifetime 600s, addr: fdf9:42b:7194:10::1 addr: fdf9:42b:7194:10::1
	  mtu option (5), length 8 (1):  1480
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
19:25:09.990915 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) :: > ff02::1:ffc1:b59f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f
	  unknown option (14), length 8 (1): 
	  0x0000:  b6c7 0fce ab02
19:25:10.138917 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) :: > ff02::1:ffa7:f02b: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:bdfb:7202:64a7:f02b
	  unknown option (14), length 8 (1): 
	  0x0000:  8cad 8401 921d
19:25:14.545167   M f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fdcf:3be:f9e0::1 > ff02::1:ffc1:b59f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
19:25:14.545250 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f > fdcf:3be:f9e0::1: [icmp6 sum ok] ICMP6, neighbor advertisement, length 32, tgt is 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f, Flags [solicited, override]
	  destination link-address option (2), length 8 (1): d0:ab:d5:51:82:18
19:25:19.766874 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::21e4:be5:f263:4bb6 > fdcf:3be:f9e0::1: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fdcf:3be:f9e0::1
	  source link-address option (1), length 8 (1): d0:ab:d5:51:82:18
19:25:19.772091  In f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 80: (hlim 255, next-header ICMPv6 (58) payload length: 24) fdcf:3be:f9e0::1 > fe80::21e4:be5:f263:4bb6: [icmp6 sum ok] ICMP6, neighbor advertisement, length 24, tgt is fdcf:3be:f9e0::1, Flags [router, solicited]
19:25:24.882025  In f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::f2ad:4eff:fe08:aa5f > fe80::21e4:be5:f263:4bb6: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::21e4:be5:f263:4bb6
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
19:25:24.882129 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 80: (hlim 255, next-header ICMPv6 (58) payload length: 24) fe80::21e4:be5:f263:4bb6 > fe80::f2ad:4eff:fe08:aa5f: [icmp6 sum ok] ICMP6, neighbor advertisement, length 24, tgt is fe80::21e4:be5:f263:4bb6, Flags [solicited]

and get ipv6 and traffic...

19:26:00.825984 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 80: (hlim 255, next-header ICMPv6 (58) payload length: 24) 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f > fe80::f2ad:4eff:fe08:aa5f: [icmp6 sum ok] ICMP6, neighbor advertisement, length 24, tgt is 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f, Flags [solicited]
19:26:00.826051  In f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 64: (flowlabel 0xba72e, hlim 255, next-header ICMPv6 (58) payload length: 8) fdcf:3be:f9e0::1 > 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f: [icmp6 sum ok] ICMP6, echo request, seq 0
19:26:00.826081 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 64: (flowlabel 0x61794, hlim 64, next-header ICMPv6 (58) payload length: 8) 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f > fdcf:3be:f9e0::1: [icmp6 sum ok] ICMP6, echo reply, seq 0
19:26:01.850807  In f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 64: (flowlabel 0xba72e, hlim 255, next-header ICMPv6 (58) payload length: 8) fdcf:3be:f9e0::1 > 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f: [icmp6 sum ok] ICMP6, echo request, seq 0
19:26:01.850856 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 64: (flowlabel 0x61794, hlim 64, next-header ICMPv6 (58) payload length: 8) 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f > fdcf:3be:f9e0::1: [icmp6 sum ok] ICMP6, echo reply, seq 0
19:26:02.875185  In f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 64: (flowlabel 0xba72e, hlim 255, next-header ICMPv6 (58) payload length: 8) fdcf:3be:f9e0::1 > 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f: [icmp6 sum ok] ICMP6, echo request, seq 0
19:26:02.875208 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 64: (flowlabel 0x61794, hlim 64, next-header ICMPv6 (58) payload length: 8) 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f > fdcf:3be:f9e0::1: [icmp6 sum ok] ICMP6, echo reply, seq 0
19:26:05.928902  In f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 64: (flowlabel 0xba72e, hlim 255, next-header ICMPv6 (58) payload length: 8) fdcf:3be:f9e0::1 > 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f: [icmp6 sum ok] ICMP6, echo request, seq 0
19:26:05.928955 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 64: (flowlabel 0x61794, hlim 64, next-header ICMPv6 (58) payload length: 8) 2a01:e34:ec81:a4c0:881e:f985:51c1:b59f > fdcf:3be:f9e0::1: [icmp6 sum ok] ICMP6, echo reply, seq 0
19:26:10.966903 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::21e4:be5:f263:4bb6 > fe80::f2ad:4eff:fe08:aa5f: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::f2ad:4eff:fe08:aa5f
	  source link-address option (1), length 8 (1): d0:ab:d5:51:82:18
19:26:10.972658  In f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 80: (hlim 255, next-header ICMPv6 (58) payload length: 24) fe80::f2ad:4eff:fe08:aa5f > fe80::21e4:be5:f263:4bb6: [icmp6 sum ok] ICMP6, neighbor advertisement, length 24, tgt is fe80::f2ad:4eff:fe08:aa5f, Flags [router, solicited]
19:26:16.186037  In f0:ad:4e:08:aa:5f ethertype IPv6 (0x86dd), length 88: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::f2ad:4eff:fe08:aa5f > fe80::21e4:be5:f263:4bb6: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has fe80::21e4:be5:f263:4bb6
	  source link-address option (1), length 8 (1): f0:ad:4e:08:aa:5f
19:26:16.186082 Out d0:ab:d5:51:82:18 ethertype IPv6 (0x86dd), length 80: (hlim 255, next-header ICMPv6 (58) payload length: 24) fe80::21e4:be5:f263:4bb6 > fe80::f2ad:4eff:fe08:aa5f: [icmp6 sum ok] ICMP6, neighbor advertisement, length 24, tgt is fe80::21e4:be5:f263:4bb6, Flags [solicited]

erdoukki · September 28, 2020, 5:40pm

SOLVED !!!
IT IS MY SWITCH !!!

My switch is a NETGEAR PROSAFE GS105E, which look to filter something and break IPv6 !!!

When my Ubuntu is directly linked to the BR-LAN port of the espressobin; I get IPV6....
THANKS ALL and mainly @trendy !

trendy · September 28, 2020, 7:36pm

It seemed weird not to get anything at all, while the host sends them.
As it happened to the other post, it is important to explain the full topology, so we can troubleshoot devices in the middle like this switch.

system · October 8, 2020, 7:36pm

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