The modem AVM 6360 get it’s IP address lease with the usual process (Discovery,Offer,Req.,Ack) but continue to send DHCP request to DHCP server, as you can see below.
I’m able to ping the IP address leased. Now the modem is fully IP provisioned but continue to send request and don’t download his MTA config. file.
[root@dhcp ~]# /usr/sbin/tcpdump -i eth0 "udp[0x28:2] = 0xe64a and (port bootpc or port bootps)" -v | grep "DHCP-Message Option 53"
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
DHCP-Message Option 53, length 1: Request
DHCP-Message Option 53, length 1: ACK
DHCP-Message Option 53, length 1: Discover
DHCP-Message Option 53, length 1: Offer
DHCP-Message Option 53, length 1: Request
DHCP-Message Option 53, length 1: ACK
DHCP-Message Option 53, length 1: Request
DHCP-Message Option 53, length 1: ACK
DHCP-Message Option 53, length 1: Request
DHCP-Message Option 53, length 1: ACK
DHCP-Message Option 53, length 1: Request
DHCP-Message Option 53, length 1: ACK
DHCP-Message Option 53, length 1: Request
DHCP-Message Option 53, length 1: ACK
DHCP-Message Option 53, length 1: Request
DHCP-Message Option 53, length 1: ACK
DHCP-Message Option 53, length 1: Discover
DHCP-Message Option 53, length 1: Offer
DHCP-Message Option 53, length 1: Request
DHCP-Message Option 53, length 1: ACK
DHCP-Message Option 53, length 1: Request
DHCP-Message Option 53, length 1: ACK
[root@dhcp ~]# ping 10.248.0.242
PING 10.248.0.242 (10.248.0.242) 56(84) bytes of data.
64 bytes from 10.248.0.242: icmp_seq=1 ttl=63 time=10.2 ms
64 bytes from 10.248.0.242: icmp_seq=2 ttl=63 time=8.60 ms
CMTS#sh cable modem c0:bc:06:25:e6:4a cpe
IP address MAC address Dual IP Device Class
10.249.0.242 c025.064a.e6b8 N Host
10.248.0.242 c025.064a.e6bc N Host
Exchange of DHCP message
cablegwd3.docsis.bootps > dhcp.bootps: BOOTP/DHCP, Request from c0:25:06:4a:e6:bc (oui Unknown), length 519, hops 1, xid 0x57e580cf, Flags [none]
Gateway-IP cablegwd3.docsis
Client-Ethernet-Address c0:bc:06:25:e6:4a (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Request
Vendor-Class Option 60, length 126: "pktc2.0:05390101020201020501010901010a01010b040106090F0d010110010912020004130130200160101170001a011F18010019010114010115010100"
Vendor-Option Option 43, length 78: 2.4.69.68.86.65.4.8.52.65.58.69.54.58.66.66.5.5.49.53.55.46.50.6.7.48.46.57.7.6.49.46.49.50.49.50.8.6.67.48.50.53.48.54.9.4.54.51.54.48.10.8.65.86.77.32.71.109.98.72.31.6.192.37.6.74.230.188.52.46.48.46.32.4.49.73.7.134
Client-ID Option 61, length 15: hardware-type 255, 06:4a:01:c0:bc:06:25:e6:4a:e6:bc:00:03:00
Requested-IP Option 50, length 4: 10.248.0.242
Server-ID Option 54, length 4: dhcp
Parameter-Request Option 55, length 7:
Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
Hostname, Domain-Name, Option 122
Agent-Information Option 82, length 27:
Circuit-ID SubOption 1, length 4: ^@^B^CM-q
Remote-ID SubOption 2, length 6: M-@%^FJM-fM-;
Unknown SubOption 9, length 11:
0x0000: 0000 118b 0601 0401 0203 00
15:59:40.133872 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 438)
dhcp.bootps > cablegwd3.docsis.bootps: BOOTP/DHCP, Reply, length 410, xid 0x57e580cf, Flags [none]
Your-IP 10.248.0.242
Server-IP dhcp
Gateway-IP cablegwd3.docsis
Client-Ethernet-Address c0:bc:06:25:e6:4a (oui Unknown)
file "MTA/sip_AVM_config.bin"
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Server-ID Option 54, length 4: dhcp
Subnet-Mask Option 1, length 4: 255.255.255.0
Lease-Time Option 51, length 4: 2592000
Time-Zone Option 2, length 4: 3600
Default-Gateway Option 3, length 4: cablegwd3.docsis
Time-Server Option 4, length 4: dhcp
IEN-Name-Server Option 5, length 12: ns.fr,ns.uk
Domain-Name-Server Option 6, length 12: ns.fr,ns.uk
LOG Option 7, length 4: dhcp
T122 Option 122, length 37: 1.4.192.168.0.1.3.15.0.5.115.105.112.49.50.3.116.101.112.2.99.104.0.8.1.60.6.9.5.66.65.83.73.67.1.49.0
Domain-Name Option 15, length 12: "sip12.docsis"
Hostname Option 12, length 12: "C0BC0625E64A"
Agent-Information Option 82, length 27:
Circuit-ID SubOption 1, length 4: ^@^B^CM-q
Remote-ID SubOption 2, length 6: M-@%^FJM-fM-;
Unknown SubOption 9, length 11:
0x0000: 0000 118b 0601 0401 0203 00
15:59:55.260403 IP (tos 0x0, ttl 255, id 36021, offset 0, flags [none], proto UDP (17), length 547)
cablegwd3.docsis.bootps > dhcp.bootps: BOOTP/DHCP, Request from c0:bc:06:25:e6:4a (oui Unknown), length 519, hops 1, xid 0x57e580cf, Flags [none]
Gateway-IP cablegwd3.docsis
Client-Ethernet-Address c0:bc:06:25:e6:4a (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Request
Vendor-Class Option 60, length 126: "pktc2.0:05390101020201020501010901010a01010b040106090F0d010110010912020004130130200160101170001a011F18010019010114010115010100"
Vendor-Option Option 43, length 78: 2.4.69.68.86.65.4.8.52.65.58.69.54.58.66.66.5.5.49.53.55.46.50.6.7.48.46.57.7.6.49.46.49.50.49.50.8.6.67.48.50.53.48.54.9.4.54.51.54.48.10.8.65.86.77.32.71.109.98.72.31.6.192.37.6.74.230.188.52.46.48.46.32.4.49.73.7.134
Client-ID Option 61, length 15: hardware-type 255, 06:4a:01:c0:bc:06:25:e6:4a:e6:bc:00:03:00
Requested-IP Option 50, length 4: 10.248.0.242
Server-ID Option 54, length 4: dhcp
Parameter-Request Option 55, length 7:
Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
Hostname, Domain-Name, Option 122
Agent-Information Option 82, length 27:
Circuit-ID SubOption 1, length 4: ^@^B^CM-q
Remote-ID SubOption 2, length 6: M-@%^FJM-fM-;
Unknown SubOption 9, length 11:
0x0000: 0000 118b 0601 0401 0203 00
15:59:55.260902 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 438)
dhcp.bootps > cablegwd3.docsis.bootps: BOOTP/DHCP, Reply, length 410, xid 0x57e580cf, Flags [none]
Your-IP 10.248.0.242
Server-IP dhcp
Gateway-IP cablegwd3.docsis
Client-Ethernet-Address c0:bc:06:25:e6:4a (oui Unknown)
file "MTA/sip_AVM_config.bin"
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Server-ID Option 54, length 4: dhcp
Subnet-Mask Option 1, length 4: 255.255.255.0
Lease-Time Option 51, length 4: 2592000
Time-Zone Option 2, length 4: 3600
Default-Gateway Option 3, length 4: cablegwd3.docsis
Time-Server Option 4, length 4: dhcp
IEN-Name-Server Option 5, length 12: ns.fr,ns.uk
Domain-Name-Server Option 6, length 12: ns.fr,ns.uk
LOG Option 7, length 4: dhcp
T122 Option 122, length 37: 1.4.192.168.0.1.3.15.0.5.115.105.112.49.50.3.116.101.112.2.99.104.0.8.1.60.6.9.5.66.65.83.73.67.1.49.0
Domain-Name Option 15, length 12: "sip12.docsis"
Hostname Option 12, length 12: "C0BC0625E64A"
Agent-Information Option 82, length 27:
Circuit-ID SubOption 1, length 4: ^@^B^CM-q
Remote-ID SubOption 2, length 6: M-@%^FJM-fM-;
Unknown SubOption 9, length 11:
0x0000: 0000 118b 0601 0401 0203 00