[LEDE-DEV] wifi and wan ipv6 connectivity

e9hack e9hack at gmail.com
Tue Aug 8 09:02:12 PDT 2017 

Hi,

for testing I add a hotplug script. Bellow I did copy my test sequence and the output. There are a few seconds between
the commands. If 'wifi ...' is called, the 2003: address of my wan interface is gone. The other addresses are still
assigned. If 'ubus ...' is called, the wan interface gets the same 2003: address back.

Regards,
Hartmut


root at WLAN:~# cat /etc/config/network
...
config interface 'wan'
	option ifname 'eth0.7'
	option proto 'pppoe'
	option username 'xxxxxxxxxxxxyyyyyyyyyyyyyyyy at t-online.de'
	option password 'zzzzzzzz'
	option keepalive '10 5'
	option pppd_options 'debug'
	option persist '1'
	option maxfail '50'
	option holdoff '5'
...

root at WLAN:~# cat /etc/hotplug.d/iface/99-debug
#!/bin/sh
[ "$INTERFACE" = "wan_6" ] && logger -t DEBUG "hotplug: device='$INTERFACE' action='$ACTION'"

root at WLAN:~# ifconfig pppoe-wan
pppoe-wan Link encap:Point-to-Point Protocol
          inet addr:217.xxx.yyy.zzz  P-t-P:87.xxx.yyy.zzz  Mask:255.255.255.255
          inet6 addr: 2003:AAAA:BBBB:CCCC:aaaa:bbbb:cccc:dddd/64 Scope:Global
          inet6 addr: fe80::aaaa:bbbb:cccc:dddd/10 Scope:Link
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1492  Metric:1
          RX packets:129701 errors:0 dropped:0 overruns:0 frame:0
          TX packets:76890 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:149174780 (142.2 MiB)  TX bytes:32962821 (31.4 MiB)
		
root at WLAN:~# wifi reload		

root at WLAN:~# logread		
...
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: reading /tmp/resolv.conf.auto
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using local addresses only for domain test
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using local addresses only for domain onion
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using local addresses only for domain localhost
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using local addresses only for domain local
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using local addresses only for domain invalid
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using local addresses only for domain example.net
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using local addresses only for domain example.org
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using local addresses only for domain example.com
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using nameserver 217.xxx.yyy.zzz#53
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using nameserver 217.xxx.xxx.xxx#53
Tue Aug  8 17:33:39 2017 daemon.info dnsmasq[7773]: using 3 more local addresses
Tue Aug  8 17:33:39 2017 daemon.notice netifd: Interface 'wan_6' is now down
Tue Aug  8 17:33:39 2017 daemon.notice netifd: Interface 'wan_6' is disabled
Tue Aug  8 17:33:39 2017 daemon.notice netifd: Interface 'wan_6' has link connectivity loss
Tue Aug  8 17:33:39 2017 daemon.notice netifd: Network alias 'pppoe-wan' link is up
Tue Aug  8 17:33:39 2017 daemon.notice netifd: Interface 'wan_6' is enabled
Tue Aug  8 17:33:39 2017 daemon.notice netifd: Interface 'wan_6' has link connectivity
Tue Aug  8 17:33:39 2017 daemon.notice netifd: Interface 'wan_6' is setting up now
Tue Aug  8 17:33:41 2017 user.notice DEBUG: hotplug: device='wan_6' action='ifdown'
Tue Aug  8 17:33:41 2017 user.notice ddns-scripts[27798]: dynv6_ipv6: PID '27798' terminated by 'SIGTERM' at 2017-08-08
17:33
Tue Aug  8 17:33:41 2017 user.notice DEBUG: hotplug: device='wan_6' action='ifup-failed'
...
		
root at WLAN:~# ifconfig pppoe-wan
pppoe-wan Link encap:Point-to-Point Protocol
          inet addr:217.xxx.yyy.zzz  P-t-P:87.xxx.yyy.zzz  Mask:255.255.255.255
          inet6 addr: fe80::aaaa:bbbb:cccc:dddd/10 Scope:Link
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1492  Metric:1
          RX packets:129722 errors:0 dropped:0 overruns:0 frame:0
          TX packets:76916 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:149177731 (142.2 MiB)  TX bytes:32965765 (31.4 MiB)
		
root at WLAN:~# ubus call network add_dynamic '{ "name": "wan_6", "ifname": "@wan", "proto": "dhcpv6", "zone": "wan" }'		

root at WLAN:~# ifconfig pppoe-wan
pppoe-wan Link encap:Point-to-Point Protocol
          inet addr:217.xxx.yyy.zzz  P-t-P:87.xxx.yyy.zzz  Mask:255.255.255.255
          inet6 addr: 2003:AAAA:BBBB:CCCC:aaaa:bbbb:cccc:dddd/64 Scope:Global
          inet6 addr: fe80::aaaa:bbbb:cccc:dddd/10 Scope:Link
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1492  Metric:1
          RX packets:129871 errors:0 dropped:0 overruns:0 frame:0
          TX packets:77068 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:149257479 (142.3 MiB)  TX bytes:32988794 (31.4 MiB)

root at WLAN:~# logread		
...
Tue Aug  8 17:35:55 2017 daemon.notice netifd: Interface 'wan_6' is now down
Tue Aug  8 17:35:55 2017 daemon.notice netifd: Interface 'wan_6' is disabled
Tue Aug  8 17:35:55 2017 daemon.notice netifd: Interface 'wan_6' has link connectivity loss
Tue Aug  8 17:35:55 2017 daemon.notice netifd: Network alias 'pppoe-wan' link is up
Tue Aug  8 17:35:55 2017 daemon.notice netifd: Interface 'wan_6' is enabled
Tue Aug  8 17:35:55 2017 daemon.notice netifd: Interface 'wan_6' has link connectivity
Tue Aug  8 17:35:55 2017 daemon.notice netifd: Interface 'wan_6' is setting up now
Tue Aug  8 17:35:55 2017 user.notice DEBUG: hotplug: device='wan_6' action='ifup-failed'
Tue Aug  8 17:36:06 2017 daemon.warn netifd: Failed to assign requested subprefix of size 60 for lan, trying other
Tue Aug  8 17:36:06 2017 daemon.notice netifd: Interface 'wan_6' is now up
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: reading /tmp/resolv.conf.auto
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using local addresses only for domain test
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using local addresses only for domain onion
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using local addresses only for domain localhost
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using local addresses only for domain local
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using local addresses only for domain invalid
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using local addresses only for domain example.net
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using local addresses only for domain example.org
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using local addresses only for domain example.com
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using nameserver 217.xxx.yyy.zzz#53
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using nameserver 217.xxx.yyy.zzz#53
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using nameserver 2003:AAAA:BBBB:CCCC::53#53
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using nameserver 2003:AAAA:BBBB:CCCC::53#53
Tue Aug  8 17:36:06 2017 daemon.info dnsmasq[7773]: using 3 more local addresses
Tue Aug  8 17:36:07 2017 user.notice firewall: Reloading firewall due to ifup of wan_6 (pppoe-wan)
Tue Aug  8 17:36:10 2017 user.notice DEBUG: hotplug: device='wan_6' action='ifup'
Tue Aug  8 17:36:13 2017 user.notice ddns-scripts[28972]: dynv6_ipv6: PID '28972' started at 2017-08-08 17:36
...		


Am 07.08.2017 um 18:49 schrieb Hans Dedecker:
> This is certainly not intended behavior as there's no direct link
> between wireless and dynamic interfaces in netifd.
> 
> Can you elaborate a bit more giving the complete picture of the
> network config  and how the issue is triggered ?

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