[Kea-users] Problem receive IP
Marcin Siodelski
marcin at isc.org
Mon Apr 25 10:22:41 UTC 2016
Hello,
It appears that the host 10.250.0.1 (CMTS?) sends the DHCPDISCOVER
packet from port 68 (DHCP client port) and Kea server responds to port
67. This seems to be a direct cause for you to not see the server
response on the CMTS. Because the CMTS acts as a relay agent (sets
giaddr), the server must respond to port 67 according to RFC 1542:
"The server SHOULD next check the 'giaddr' field. If this field is
non-zero, the server SHOULD send the BOOTREPLY as an IP unicast to
the IP address identified in the 'giaddr' field. The UDP destination
port MUST be set to BOOTPS (67). This action will deliver the
BOOTREPLY message directly to the BOOTP relay agent closest to the
client"
and that's what it presumably does. Can you change your relay/CMTS
configuration so as it uses port 67?
Marcin Siodelski
ISC
On 14.04.2016 21:25, Suporte2 - TVC Tubarão wrote:
> In my test lab, using a network cable modem, the DEBUG dhcp get the
> application packet, it does the processing package and return to the
> CMTS. At the CMTS, in debug mode, no receipt of this package. Running
> tcpdump in the dhcp server, has the record of sending this package. The
> cable modem log accuses be expecting record in DHCP.
>
> Can someone help me?
>
>
>
> *_Config file Kea (kea.conf)_*
>
>
>
> # This is a basic configuration for the Kea DHCPv4 and DHCPv6 servers.
>
> # Subnet declarations are commented out and no interfaces are listed.
>
> # Therefore, the servers will not listen or respond to any queries.
>
> # The basic configuration must be extended to specify interfaces on
>
> # which the servers should listen. Also, subnets and options must be
>
> # declared.
>
> {
>
>
>
> # DHCPv4 configuration starts here.
>
> "Dhcp4":
>
> {
>
> # Add names of interfaces to listen on.
>
> "interfaces-config": {
>
> "interfaces": [ "ens192" ],
>
> "dhcp-socket-type": "raw"
>
> },
>
>
>
> # Use Memfile lease database backend to store leases in a CSV file.
>
> # "lease-database": {
>
> # "type": "mysql",
>
> # "host": "localhost",
>
> # "user": "root",
>
> # "password": "********",
>
> # "name": "kea"
>
> # },
>
> "lease-database": {
>
> "type": "memfile",
>
> "persist": true,
>
> "name": "/dhcp4.leases"
>
> },
>
> "match-client-id": true,
>
> # 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,
>
> "echo-client-id": false,
>
> "decline-probation-period": 3600,
>
> # Below an example of the simple subnet declaration. Uncomment to
>
> # enable it. This is a list, denoted with [ ], of structure, denoted
>
> # with { }. Each structure describes a single subnet and may have
>
> # several parameters. One of those parameters is "pools" that is
>
> # also a list of structures.
>
> "client-classes": [
>
> {
>
> "name": "docsis",
>
> "test": "substring(option[60].hex,0,9) == 'docsis2.0'"
>
> },
>
> ],
>
> "subnet4": [
>
> {
>
> "subnet": "10.250.0.0/24",
>
> "pools": [ { "pool": "10.250.0.2 - 10.250.0.255" } ] ,
>
> "client-class": "docsis",
>
> "relay": {
>
> "ip-address": "10.250.0.1"
>
> },
>
> "reservations": [
>
> {
>
> "hw-address": "00:23:ed:ad:95:08",
>
> "ip-address": "10.250.0.200"
>
> }
>
> ],
>
> "next-server": "10.250.0.1",
>
> "option-data":[
>
> {
>
> "name": "boot-file-name",
>
> "data": "cm_mta_5121_10m.bin"
>
> },
>
> {
>
> "name": "time-offset",
>
> "data": "-10800"
>
> },
>
> {
>
> "name": "time-servers",
>
> "data": "172.18.1.54"
>
> },
>
> {
>
> "name": "domain-name-servers",
>
> "data": "xxx.xxx.xxx.xxx"
>
> },
>
> {
>
> "name": "routers",
>
> "data": "100.250.0.1"
>
> },
>
> {
>
> "name": "tftp-server-name",
>
> "data": "172.18.1.54"
>
> },
>
> {
>
> "name": "log-servers",
>
> "data": "172.18.1.54"
>
> },
>
> ]
>
> },
>
> {
>
> "subnet": "10.251.0.1/24",
>
> "pools": [ { "pool": "10.251.0.2 - 10.251.0.255" } ],
>
> "client-class": "CPE",
>
> "relay": {
>
> "ip-address": "10.251.0.1"
>
> }
>
> }
>
>
>
> ]
>
> },
>
>
>
> # DHCPv6 configuration starts here.
>
> "Dhcp6":
>
> {
>
> # Add names of interfaces to listen on.
>
> "interfaces-config": {
>
> "interfaces": [ "ens192" ]
>
> },
>
>
>
> # Use Memfile lease database backend to store leases in a CSV file.
>
> "lease-database": {
>
> "type": "mysql",
>
> "host": "localhost",
>
> "user": "root",
>
> "password": "**********",
>
> "name": "kea"
>
> },
>
>
>
> # 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
>
> },
>
>
>
> # Addresses will be assigned with preferred and valid lifetimes
>
> # being 3000 and 4000, respectively. Client is told to start
>
> # renewing after 1000 seconds. If the server does not respond
>
> # after 2000 seconds since the lease was granted, client is supposed
>
> # to start REBIND procedure (emergency renewal that allows switching
>
> # to a different server).
>
> "preferred-lifetime": 3000,
>
> "valid-lifetime": 4000,
>
> "renew-timer": 1000,
>
> "rebind-timer": 2000,
>
>
>
> # The following list defines subnets. Uncomment to enable them.
>
> "subnet6": [
>
> # { "subnet": "2001:db8:1::/64",
>
> # "pools": [ { "pool": "2001:db8:1::/80" } ] },
>
> # { "subnet": "2001:db8:2::/64",
>
> # "pools": [ { "pool": "2001:db8:2::/80" } ] },
>
> # { "subnet": "2001:db8:3::/64",
>
> # "pools": [ { "pool": "2001:db8:3::/80" } ] },
>
> # { "subnet": "2001:db8:4::/64",
>
> # "pools": [ { "pool": "2001:db8:4::/80" } ] }
>
> ]
>
> },
>
>
>
> # DHCP DDNS configuration starts here.
>
> "DhcpDdns":
>
> {
>
> "ip-address": "127.0.0.1",
>
> "port": 53001,
>
> "tsig-keys": [],
>
> "forward-ddns" : {},
>
> "reverse-ddns" : {}
>
> },
>
>
>
> # Logging configuration starts here. It tells Kea servers to store
>
> # all log messages (on severity INFO or more) in a file.
>
> # debuglevel variable is used on DEBUG level only.
>
> "Logging":
>
> {
>
> "loggers": [
>
> {
>
> "name": "kea-dhcp4",
>
> "output_options": [
>
> {
>
> "output": "/usr/local/var/log/kea-dhcp4.log",
>
> "maxver": 8,
>
> "maxsize": 204800,
>
> "flush": true
>
> }
>
> ],
>
> "severity": "DEBUG",
>
> "debuglevel": 99
>
> },
>
> {
>
> "name": "kea-dhcp6",
>
> "output_options": [
>
> {
>
> "output": "/usr/local/var/log/kea-dhcp6.log"
>
> }
>
> ],
>
> "severity": "INFO",
>
> "debuglevel": 0
>
> },
>
> {
>
> "name": "kea-dhcp-ddns",
>
> "output_options": [
>
> {
>
> "output": "/usr/local/var/log/kea-ddns.log"
>
> }
>
> ],
>
> "severity": "INFO",
>
> "debuglevel": 0
>
> }
>
> ]
>
> }
>
> }
>
>
>
> *_DEBUG file kea:_*
>
>
>
> 2016-04-14 16:09:19.222 DEBUG [kea-dhcp4.packets/29795]
> DHCP4_BUFFER_WAIT waiting for next DHCPv4 packet with timeout 1000 ms
>
> 2016-04-14 16:09:20.571 DEBUG [kea-dhcp4.packets/29795]
> DHCP4_BUFFER_RECEIVED received buffer from 10.250.0.1:68 to
> 172.18.1.54:67 over interface ens192
>
> 2016-04-14 16:09:20.571 DEBUG [kea-dhcp4.options/29795]
> DHCP4_BUFFER_UNPACK parsing buffer received from 10.250.0.1 to
> 172.18.1.54 over interface ens192
>
> 2016-04-14 16:09:20.571 INFO [kea-dhcp4.options/29795] EVAL_RESULT
> Expression docsis evaluated to 1
>
> 2016-04-14 16:09:20.571 DEBUG [kea-dhcp4.dhcp4/29795]
> DHCP4_CLASS_ASSIGNED [hwtype=1 00:23:ed:ad:95:08],
> cid=[01:00:23:ed:ad:95:08], tid=0x5c76374: client packet has been
> assigned to the following class(es):
> VENDOR_CLASS_docsis2.0:053501010102010203010104010105010106010107010f0801100901000a01010b01180c01010d0200700e0200100f0101100400000004docsis
>
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.packets/29795]
> DHCP4_PACKET_RECEIVED [hwtype=1 00:23:ed:ad:95:08],
> cid=[01:00:23:ed:ad:95:08], tid=0x5c76374: DHCPDISCOVER (type 1)
> received from 10.250.0.1 to 172.18.1.54 on interface ens192
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.packets/29795] DHCP4_QUERY_DATA
> [hwtype=1 00:23:ed:ad:95:08], cid=[01:00:23:ed:ad:95:08], tid=0x5c76374,
> packet details: local_address=172.18.1.54:67,
> remote_adress=10.250.0.1:68, msg_type=DHCPDISCOVER (1), transid=0x5c76374,
>
> options:
>
> type=043, len=122:,
>
> options:
>
> type=002, len=003: 45:43:4d
>
> type=003, len=008: 45:43:4d:3a:45:4d:54:41
>
> type=004, len=024:
> 31:39:32:36:36:34:39:32:30:35:30:30:30:37:39:36:30:36:30:32:30:30:34:35
>
> type=005, len=003: 31:2e:30
>
> type=006, len=030:
> 53:42:56:35:31:32:31:2d:53:49:50:2d:31:2e:30:2e:37:2d:53:43:4d:2d:30:35:2d:53:48:50:43:20
>
> type=007, len=003: 38:2e:35
>
> type=008, len=006: 30:30:32:30:34:30
>
> type=009, len=007: 53:42:56:35:31:32:31
>
> type=010, len=020:
> 4d:6f:74:6f:72:6f:6c:61:20:43:6f:72:70:6f:72:61:74:69:6f:6e
>
> type=053, len=001: 1 (uint8)
>
> type=055, len=008: 66(uint8) 67(uint8) 1(uint8) 3(uint8) 2(uint8)
> 4(uint8) 7(uint8) 122(uint8)
>
> type=057, len=002: 600 (uint16)
>
> type=060, len=120:
> "docsis2.0:053501010102010203010104010105010106010107010f0801100901000a01010b01180c01010d0200700e0200100f0101100400000004"
> (string)
>
> type=061, len=007: 01:00:23:ed:ad:95:08
>
> type=082, len=008:,
>
> options:
>
> type=002, len=006: 00:23:ed:ad:95:08
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.packets/29795]
> DHCP4_SUBNET_SELECTED [hwtype=1 00:23:ed:ad:95:08],
> cid=[01:00:23:ed:ad:95:08], tid=0x5c76374: the subnet with ID 1 was
> selected for client assignments
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.packets/29795]
> DHCP4_SUBNET_DATA [hwtype=1 00:23:ed:ad:95:08],
> cid=[01:00:23:ed:ad:95:08], tid=0x5c76374: the selected subnet details:
> 10.250.0.0/24
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.hosts/29795]
> HOSTS_CFG_GET_ONE_SUBNET_ID_HWADDR_DUID get one host with IPv4
> reservation for subnet id 1, HWADDR hwtype=1 00:23:ed:ad:95:08, DUID
> 01:00:23:ed:ad:95:08
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.hosts/29795]
> HOSTS_CFG_GET_ALL_HWADDR_DUID get all hosts with reservations for HWADDR
> hwtype=1 00:23:ed:ad:95:08 and DUID 01:00:23:ed:ad:95:08
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.hosts/29795]
> HOSTS_CFG_GET_ALL_IDENTIFIER get all hosts with reservations using
> identifier: hwaddr=00:23:ed:ad:95:08
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.hosts/29795]
> HOSTS_CFG_GET_ALL_IDENTIFIER_HOST using identifier:
> hwaddr=00:23:ed:ad:95:08, found host: hwaddr=00:23:ed:ad:95:08
> ipv4_subnet_id=1 hostname=(empty) ipv4_reservation=10.250.0.200
> ipv6_reservations=(none)
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.hosts/29795]
> HOSTS_CFG_GET_ALL_IDENTIFIER_COUNT using identifier
> hwaddr=00:23:ed:ad:95:08, found 1 host(s)
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.hosts/29795]
> HOSTS_CFG_GET_ALL_IDENTIFIER get all hosts with reservations using
> identifier: duid=01:00:23:ed:ad:95:08
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.hosts/29795]
> HOSTS_CFG_GET_ALL_IDENTIFIER_COUNT using identifier
> duid=01:00:23:ed:ad:95:08, found 1 host(s)
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.hosts/29795]
> HOSTS_CFG_GET_ONE_SUBNET_ID_HWADDR_DUID get one host with 1 reservation
> for subnet id hwtype=1 00:23:ed:ad:95:08, HWADDR 01:00:23:ed:ad:95:08,
> DUID hwaddr=00:23:ed:ad:95:08 ipv4_subnet_id=1 hostname=(empty)
> ipv4_reservation=10.250.0.200 ipv6_reservations=(none)
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.dhcpsrv/29795]
> DHCPSRV_MEMFILE_GET_SUBID_CLIENTID obtaining IPv4 lease for subnet ID 1
> and client ID 01:00:23:ed:ad:95:08
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.dhcpsrv/29795]
> DHCPSRV_MEMFILE_GET_SUBID_HWADDR obtaining IPv4 lease for subnet ID 1
> and hardware address hwtype=1 00:23:ed:ad:95:08
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.alloc-engine/29795]
> ALLOC_ENGINE_V4_DISCOVER_HR client [hwtype=1 00:23:ed:ad:95:08],
> cid=[01:00:23:ed:ad:95:08], tid=0x5c76374 sending DHCPDISCOVER has
> reservation for the address 10.250.0.200
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.dhcpsrv/29795]
> DHCPSRV_MEMFILE_GET_ADDR4 obtaining IPv4 lease for address 10.250.0.200
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.dhcpsrv/29795]
> DHCPSRV_MEMFILE_GET_ADDR4 obtaining IPv4 lease for address 10.250.0.200
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.leases/29795]
> DHCP4_LEASE_ADVERT [hwtype=1 00:23:ed:ad:95:08],
> cid=[01:00:23:ed:ad:95:08], tid=0x5c76374: lease 10.250.0.200 will be
> advertised
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.options/29795]
> DHCP4_PACKET_PACK [hwtype=1 00:23:ed:ad:95:08], cid=[no info],
> tid=0x5c76374: preparing on-wire format of the packet to be sent
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.packets/29795]
> DHCP4_PACKET_SEND [hwtype=1 00:23:ed:ad:95:08], cid=[no info],
> tid=0x5c76374: trying to send packet DHCPOFFER (type 2) from
> 172.18.1.54:67 to 10.250.0.1:67 on interface ens192
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.packets/29795]
> DHCP4_RESPONSE_DATA [hwtype=1 00:23:ed:ad:95:08], cid=[no info],
> tid=0x5c76374: responding with packet DHCPOFFER (type 2), packet
> details: local_address=172.18.1.54:67, remote_adress=10.250.0.1:67,
> msg_type=DHCPOFFER (2), transid=0x5c76374,
>
> options:
>
> type=001, len=004: 4294967040 (uint32)
>
> type=002, len=004: -10800 (int32)
>
> type=003, len=004: 100.250.0.1
>
> type=004, len=004: 172.18.1.54
>
> type=006, len=004: xxx.xxx.xxx.xxx
>
> type=007, len=004: 172.18.1.54
>
> type=051, len=004: 4000 (uint32)
>
> type=053, len=001: 2 (uint8)
>
> type=054, len=004: 172.18.1.54
>
> type=066, len=011: "172.18.1.54" (string)
>
> type=067, len=019: "cm_mta_5121_10m.bin" (string)
>
> type=082, len=008:,
>
> options:
>
> type=002, len=006: 00:23:ed:ad:95:08
>
> 2016-04-14 16:09:20.572 DEBUG [kea-dhcp4.packets/29795]
> DHCP4_BUFFER_WAIT waiting for next DHCPv4 packet with timeout 1000 ms
>
>
>
>
>
> *_tcpdump file:_*
>
>
>
> 10.250.0.1.bootpc > dhcp-cmmta.bootps: [udp sum ok] BOOTP/DHCP,
> Request from 00:23:ed:ad:95:08 (oui Unknown), length 610, hops 1, xid
> 0x5c76374, Flags [Broadcast] (0x8000)
>
> Gateway-IP 10.250.0.1
>
> Client-Ethernet-Address 00:23:ed:ad:95:08 (oui Unknown)
>
> Vendor-rfc1048 Extensions
>
> Magic Cookie 0x63825363
>
> DHCP-Message Option 53, length 1: Discover
>
> MSZ Option 57, length 2: 600
>
> Vendor-Class Option 60, length 120:
> "docsis2.0:053501010102010203010104010105010106010107010f0801100901000a01010b01180c01010d0200700e0200100f0101100400000004"
>
> Parameter-Request Option 55, length 8:
>
> TFTP, BF, Subnet-Mask, Default-Gateway
>
> Time-Zone, Time-Server, LOG, Option 122
>
> Client-ID Option 61, length 7: ether 00:23:ed:ad:95:08
>
> Vendor-Option Option 43, length 122:
> 2.3.69.67.77.3.8.69.67.77.58.69.77.84.65.5.3.49.46.48.6.30.83.66.86.53.49.50.49.45.83.73.80.45.49.46.48.46.55.45.83.67.77.45.48.53.45.83.72.80.67.32.7.3.56.46.53.8.6.48.48.50.48.52.48.9.7.83.66.86.53.49.50.49.10.20.77.111.116.111.114.111.108.97.32.67.111.114.112.111.114.97.116.105.111.110.4.24.49.57.50.54.54.52.57.50.48.53.48.48.48.55.57.54.48.54.48.50.48.48.52.53
>
> Agent-Information Option 82, length 8:
>
> Remote-ID SubOption 2, length 6: ^@#M-mM--M-^U^H
>
> 15:59:52.978075 IP (tos 0x10, ttl 128, id 0, offset 0, flags [DF], proto
> UDP (17), length 364)
>
> dhcp-cmmta.bootps > 10.250.0.1.bootps: [udp sum ok] BOOTP/DHCP,
> Reply, length 336, hops 1, xid 0x5c76374, Flags [none] (0x0000)
>
> Your-IP 10.250.0.200
>
> Server-IP 10.250.0.1
>
> Gateway-IP 10.250.0.1
>
> Client-Ethernet-Address 00:23:ed:ad:95:08 (oui Unknown)
>
> Vendor-rfc1048 Extensions
>
> Magic Cookie 0x63825363
>
> Subnet-Mask Option 1, length 4: 255.255.255.0
>
> Time-Zone Option 2, length 4: -10800
>
> Default-Gateway Option 3, length 4: 100.250.0.1
>
> Time-Server Option 4, length 4: dhcp-cmmta
>
> Domain-Name-Server Option 6, length 4: ns2.tvc.tv.br
>
> LOG Option 7, length 4: dhcp-cmmta
>
> Lease-Time Option 51, length 4: 4000
>
> DHCP-Message Option 53, length 1: Offer
>
> Server-ID Option 54, length 4: dhcp-cmmta
>
> TFTP Option 66, length 11: "172.18.1.54"
>
> BF Option 67, length 19: "cm_mta_5121_10m.bin"
>
> Agent-Information Option 82, length 8:
>
> Remote-ID SubOption 2, length 6: ^@#M-mM--M-^U^H
>
>
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