Hi All,
I set up a kea-dhcp6 server and while I start up the kea-dhcp6 server
with below config, there comes a warning as below:
Apr 25 02:23:00 testserver kea-dhcp6[6532]: 2018-04-25 02:23:00.563 WARN
[kea-dhcp6.dhcpsrv/6532] DHCPSRV_NO_SOCKETS_OPEN no interface
configured to listen to DHCP traffic
{ "Dhcp6":
{
"interfaces-config": {
"interfaces": [ "eth1" ]
},
"lease-database": {
"type": "memfile",
"persist": true
},
"subnet6": [
{
"pools": [ { "pool": "2001:db8:0:f101::010-2001:db8:0:f101::200" } ],
"subnet": "2001:db8:0:f101::/64",
"interface": "eth1"
}
]
}
}
Then I changed the config as below, the warning as above
DHCPSRV_NO_SOCKETS_OPEN message gone, and client can also get the ipv6
address successfully from server.
{ "Dhcp6":
{
"interfaces-config": {
"interfaces": [ "eth1" ]
},
"lease-database": {
"type": "memfile",
"persist": true
},
"subnet6": [
{
"pools": [ { "pool":
"fe80::2a0:c9ff:fe00:10-fe80::2a0:c9ff:fe00:200" } ],
"subnet": "fe80::2a0:c9ff:fe00:0/64",
"interface": "eth1"
}
]
}
}
And I also noticed there is some link-local address check as below, does
it mean the the kea-dhcpv6 server can only listen on link-local address,
but not global address?
bool
IfaceMgr::openSockets6(const uint16_t port,
IfaceMgrErrorMsgCallback error_handler) {
...
BOOST_FOREACH(Iface::Address addr, iface->getAddresses()) {
// Skip all but V6 addresses.
if (!addr.get().isV6()) {
continue;
}
// Bind link-local addresses only. Otherwise we bind
several sockets
// on interfaces that have several global addresses. For
examples
// with interface with 2 global addresses, we would bind 3
sockets
// (one for link-local and two for global). That would
result in
// getting each message 3 times.
if (!addr.get().isV6LinkLocal()){
continue;
}
// Run OS-specific function to open a socket capable of
receiving
// packets sent to All_DHCP_Relay_Agents_and_Servers multicast
// address.
if (openMulticastSocket(*iface, addr, port, error_handler)) {
++count;
}
}
...
}
Thanks,
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