Hello,
i have a problem with the IP ranges of multiple subnets for dhcp which i dont
understand.
My linux dhcp server has the IP 192.168.22.10 and netmask /23.
enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
group default qlen 1000
link/ether 00:e0:c5:22:fd:3a brd ff:ff:ff:ff:ff:ff
inet 192.168.22.10/23 brd 192.168.23.255 scope global enp1s0
valid_lft forever preferred_lft forever
Then i have
"Dhcp4": {
"interfaces-config": {
"interfaces": [ "enp1s0" ],
"dhcp-socket-type": "raw"
},
.....
"client-classes": [
{
"name": "Yealink-Phone1",
"test": "substring(option[60].hex,0,7) == 'yealink'"
},
{
"name": "CiscoPhone",
"test": "substring(option[60].hex,0,13) == 'Cisco Systems'"
},
{
"name": "DROP",
"test": "not member('Yealink-Phone1') and not member('CiscoPhone')"
}
],
.......
"subnet4": [
{
"id": 1,
"subnet": "192.168.22.0/24",
"pools": [ { "pool": "192.168.22.35 - 192.168.22.254" } ],
"client-class": "Yealink-Phone1",
"option-data": [
{ "name": "routers",
"data": "192.168.23.254"
},
{ "code": 66,
"data": "https://FooBar";
},
{ "name": "name-servers",
"data": "192.168.22.10"
}
]
},
{
"id": 2,
"subnet": "192.168.23.0/24",
"pools": [ { "pool": "192.168.23.200 - 192.168.23.238" } ],
"client-class": "CiscoPhone",
"option-data": [
{ "name": "ntp-servers",
"code": 42,
"data": "192.168.22.11"
},
{ "code": 66,
"data": "FooBar02"
},
]
}
]
}
}
The requests from the phones come in and are assigned to classes.
The Yealink phones shall live in 192.168.22.0/24 and the Cisco phones in
192.168.23.0/24.
2024-10-30 10:19:37.205 INFO [kea-dhcp4.options/19394.140372922102272]
EVAL_RESULT Expression Yealink-Phone01 evaluated to 1
2024-10-30 10:19:40.932 INFO [kea-dhcp4.options/19394.140372922102272]
EVAL_RESULT Expression CiscoPhone evaluated to 1
The Yealink phones getting IPs, the Cisco phones not.
2024-10-30 10:20:12.933 DEBUG [kea-dhcp4.bad-packets/19394.140372922102272]
DHCP4_PACKET_DROP_0002 [hwtype=1 f0:9e:63:0f:5a:6a],
cid=[01:f0:9e:63:0f:5a:6a], tid=0x5f9c, from interface enp1s0: no suitable
subnet configured for a direct client
The error message is "no suitable subnet configured for a direct client".
If i give the cisco phones a part of 192.168.22.0 they get IPs to. So it's a
probably an error with the netmask which i dont understand.
The server has 192.168.22.0/23 so 192.168.23.0/24 should be part of his address
range.
Could someone pls explain why the server dont distributes IPs from 192.168.23.0
?
regards
Jörg
--
Mit freundlichen Grüßen
im Auftrage
Jörg Hartmann
Referat P2 / IT-Stelle
Landesrechnungshof Sachsen-Anhalt
06844 Dessau-Roßlau, Kavalierstraße 31
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