[Kea-users] Kea doesn't respond DHCP4 requests on 2 interfaces simultaniously

[Kirill Vakhonev]

Hi All!

I have the server running FreeBSD 11 and kea woks good with ethernet 
interface. But when I add the second wlan interface, kea only responds 
on it and doesn't on the ethernet interface.

Here is my config with working ethernet:

# DHCPv4 configuration starts here.
"Dhcp4":
{
# Add names of interfaces to listen on.
   "interfaces-config": {
     "interfaces": [ "igb0", "wlan0" ]
   },

# Use Memfile lease database backend to store leases in a CSV file.
   "lease-database": {
     "type": "memfile"
   },

# Setup reclamation of the expired leases and leases affinity.
# Expired leases will be reclaimed every 10 seconds. Every 25
# seconds reclaimed leases, which have expired more than 3600
# seconds ago, will be removed. The limits for leases reclamation
# are 100 leases or 250 ms for a single cycle. A warning message
# will be logged if there are still expired leases in the
# database after 5 consecutive reclamation cycles.
   "expired-leases-processing": {
     "reclaim-timer-wait-time": 10,
     "flush-reclaimed-timer-wait-time": 25,
     "hold-reclaimed-time": 3600,
     "max-reclaim-leases": 100,
     "max-reclaim-time": 250,
     "unwarned-reclaim-cycles": 5
   },

# Global (inherited by all subnets) lease lifetime is mandatory parameter.
   "valid-lifetime": 4000,

   "subnet4": [
    {    "option-data": [
             {
                 "name": "routers",
                 "code": 3,
                 "space": "dhcp4",
                 "csv-format": true,
                 "data": "192.168.2.1"
             },
             {
                 "name": "domain-name-servers",
                 "code": 6,
                 "space": "dhcp4",
                 "csv-format": true,
                 "data": "192.168.2.1"
             },
             {
                 "name": "domain-name",
                 "code": 15,
                 "space": "dhcp4",
                 "csv-format": true,
                 "data": "ungidrid.net"
             },
             {
                 "name": "ntp-servers",
                 "code": 42,
                 "space": "dhcp4",
                 "csv-format": true,
                 "data": "192.168.2.1"
             }
         ],
         "subnet": "192.168.2.0/29",
         "pools": [ { "pool": "192.168.2.2 - 192.168.2.5" } ] }
#  ],

#  "subnet4": [
#   {    "option-data": [
#            {
#                "name": "routers",
#                "code": 3,
#                "space": "dhcp4",
#                "csv-format": true,
#                "data": "192.168.3.1"
#            },
#            {
#                "name": "domain-name-servers",
#                "code": 6,
#                "space": "dhcp4",
#                "csv-format": true,
#                "data": "192.168.3.1"
#            },
#            {
#                "name": "domain-name",
#                "code": 15,
#                "space": "dhcp4",
#                "csv-format": true,
#                "data": "ungidrid.net"
#            },
#            {
#                "name": "ntp-servers",
#                "code": 42,
#                "space": "dhcp4",
#                "csv-format": true,
#                "data": "192.168.3.1"
#            }
#        ],
#        "subnet": "192.168.3.0/28",
#        "pools": [ { "pool": "192.168.3.2 - 192.168.3.14" } ] }

   ]
},

So, when I uncomment 2nd subnet, kea responds only on wlan0, but not on 
igb0.

Interfaces addressed are:

ifconfig_igb0="inet 192.168.2.1 netmask 255.255.255.248"
ifconfig_wlan0="inet 192.168.3.1/28 ..."

Kea version:

% kea-dhcp4 -V
1.1.0
tarball
linked with:
log4plus 1.1.2
OpenSSL 1.0.2k-freebsd  26 Jan 2017
database:
Memfile backend 2.0

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