[Dnsmasq-discuss] 128 bit prefix length on static ipv6 lease

Roger James roger at beardandsandals.co.uk
Wed Aug 22 13:19:23 BST 2018


My static ipv6 leases get delivered with a 128 bit prefix length.

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
        inet 192.168.10.9 netmask 255.255.255.0 broadcast 192.168.10.255
        inet6 fe80::681:fbbe:cf42:4bf prefixlen 64 scopeid 0x20<link>
        inet6 fda0:4d7f:afbb::9 prefixlen 128 scopeid 0x0<global>
        inet6 2001:8b0:1418:4c2f2::9 prefixlen 64 scopeid 0x0<global>


The prefix on the 2001:8b0:1418:4c2f address is 64 because I have overidden 
it with a locally defined static address. The prefix on the fda0:4d7f:afbb 
address is as delivered by dnsmasq. I cannot see an obvious way to override 
this in the routers dnsmasq config. The hostid is correct so it would 
appear that my DUID is also correct. What am I missing?

Roger





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