Hello all,
I'm trying to get IPv6 running. I'm not sure if my ISP supports it on my
connection, though.
My configuration is this:
config interface 'wan'
option ifname 'eth0.2'
option proto 'pppoe'
option username ''
option password ''
option ipv6 '1'
config interface 'wan6'
option ifname '@wan'
option proto 'dhcpv6'
I captured ICMPv6 traffic to see if a prefix was offered or not:
tcpdump -n -e -s 0 -w /tmp/ip6.pcap -i any 'ip6 && icmp6 && (ip6[40] == 133 || \
ip6[40] == 134 || ip6[40] == 135 || ip6[40] == 136)'
Router Advertisements like the following were captured. They came from what
pppd calls "remote LL address".
Internet Control Message Protocol v6
Type: Router Advertisement (134)
Code: 0
Checksum: 0x6cac [correct]
Cur hop limit: 64
Flags: 0x40
0... .... = Managed address configuration: Not set
.1.. .... = Other configuration: Set
..0. .... = Home Agent: Not set
...0 0... = Prf (Default Router Preference): Medium (0)
.... .0.. = Proxy: Not set
.... ..0. = Reserved: 0
Router lifetime (s): 5400
Reachable time (ms): 0
Retrans timer (ms): 0
ICMPv6 Option (MTU : 1492)
Type: MTU (5)
Length: 1 (8 bytes)
Reserved
MTU: 1492
ICMPv6 Option (Prefix information : 2axx:xxxx:xxxx:xxx::/64)
Type: Prefix information (3)
Length: 4 (32 bytes)
Prefix Length: 64
Flag: 0xc0
1... .... = On-link flag(L): Set
.1.. .... = Autonomous address-configuration flag(A): Set
..0. .... = Router address flag(R): Not set
...0 0000 = Reserved: 0
Valid Lifetime: 4294967295 (Infinity)
Preferred Lifetime: 4294967295 (Infinity)
Reserved
Prefix: 2axx:xxxx:xxxx:xxx:: (2axx:xxxx:xxxx:xxx::)
Actually OpenWRT managed to configure am IPv6 address from this range on
the WAN interface automatically. Yet I don't have IPv6 connectivity. In
the log I see messages like these:
Tue Oct 13 23:58:18 2015 daemon.warn odhcpd[4671]: A default route is present
but there is no public prefix on br-lan thus we don't announce a default route!
Any ideas?
Kind regards,
Sebastian
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