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Software versions of OpenWrt/LEDE release, packages, etc.
Lede 17.04.1
odhcpd - 2017-10-02-c6f3d5d4-2
logspam as follows. This is captured at a time when there are no active users. I think all wifi clients were fully turned off / suspended.
Jan 14 04:00:47 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on br-lan
Jan 14 04:03:30 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan1-1
Jan 14 04:04:50 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan0-1
Jan 14 04:08:13 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan1-1
Jan 14 04:09:17 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on br-lan
Jan 14 04:12:24 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan0-1
Jan 14 04:13:27 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on br-lan
Jan 14 04:16:46 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan0-1
Jan 14 04:17:00 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan1-1
Jan 14 04:20:25 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on br-lan
I believe these are all the interfaces configured with IPv6 address assignments. The assignments are from a ULA (see below); I have no public prefix. I have two other wifi interfaces which do not appear in the logspam (and one WAN interface), but they have no IPv6 address assigned.
E.g. the lan config is
config interface 'lan'
option force_link '1'
option type 'bridge'
option proto 'static'
option ip6assign '60'
option netmask '255.255.255.0'
list ipaddr '172.16.1.1'
list ipaddr '172.16.1.2'
option _orig_ifname 'eth0.1'
option _orig_bridge 'true'
option ifname 'eth0.1'
Since you don't have a public IPv6 prefix the router lifetime in the unsolicited RA messages will be 0.
By default odhcpd uses the default minimum and maximum router advertisement interval described in RFC4861 :
MaxRtrAdvInterval
The maximum time allowed between sending
unsolicited multicast Router Advertisements from
the interface, in seconds. MUST be no less than 4
seconds and no greater than 1800 seconds.
Default: 600 seconds
MinRtrAdvInterval
The minimum time allowed between sending
unsolicited multicast Router Advertisements from
the interface, in seconds. MUST be no less than 3
seconds and no greater than .75 *
MaxRtrAdvInterval.
Default: 0.33 * MaxRtrAdvInterval If
MaxRtrAdvInterval >= 9 seconds; otherwise, the
Default is MaxRtrAdvInterval.
As such the frequency and contents of the trace is completely normal; the trace is there for trouble shooting purposes (which is often required if people complain about IPv6 connectivity issues) but if you want to suppress the trace you can set the loglevel uci parameter to 0 in the dhcp odhcpd uci section.
sourcejedi:
Supply the following if possible:
Netgear WNDR 3800
Lede 17.04.1
odhcpd - 2017-10-02-c6f3d5d4-2
logspam as follows. This is captured at a time when there are no active users. I think all wifi clients were fully turned off / suspended.
Jan 14 04:00:47 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on br-lan
Jan 14 04:03:30 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan1-1
Jan 14 04:04:50 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan0-1
Jan 14 04:08:13 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan1-1
Jan 14 04:09:17 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on br-lan
Jan 14 04:12:24 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan0-1
Jan 14 04:13:27 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on br-lan
Jan 14 04:16:46 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan0-1
Jan 14 04:17:00 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on wlan1-1
Jan 14 04:20:25 mortar.carrier.duckdns.org odhcpd[869]: Using a RA lifetime of 0 seconds on br-lan
I believe these are all the interfaces configured with IPv6 address assignments. The assignments are from a ULA (see below); I have no public prefix. I have two other wifi interfaces which do not appear in the logspam (and one WAN interface), but they have no IPv6 address assigned.
E.g. the lan config is
config interface 'lan'
option force_link '1'
option type 'bridge'
config globals 'globals'
option ula_prefix 'fd5e:fcf3:b885::/59'
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