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tcpdump: listening on dl.1001.1004, link-type EN10MB (Ethernet), capture size 65535 bytes
10:12:53.911893 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP (17), length 354)
0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 00:11:bb:e1:be:a9 (oui Unknown), length 326, xid 0xbbe1bea9, Flags [Broadcast]
Client-Ethernet-Address 00:11:bb:e1:be:a9 (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Request
Client-ID Option 61, length 7: ether 00:11:bb:e1:be:a9
Vendor-Class Option 60, length 38: "Cisco Systems, Inc. IP Phone CP-7940G^@"
Hostname Option 12, length 15: "SIP0011BBE1BEA9"
Requested-IP Option 50, length 4: 172.16.0.5
Parameter-Request Option 55, length 8:
Subnet-Mask, TFTP, Domain-Name-Server, Default-Gateway
Domain-Name, Option 150, AT, Option 151
10:12:53.912195 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 306)
172.16.0.1.bootps > 255.255.255.255.bootpc: BOOTP/DHCP, Reply, length 278, xid 0xbbe1bea9, Flags [Broadcast]
Your-IP 172.16.0.5
Client-Ethernet-Address 00:11:bb:e1:be:a9 (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Server-ID Option 54, length 4: 172.16.0.1
Lease-Time Option 51, length 4: 900
Default-Gateway Option 3, length 4: 172.16.0.1
Subnet-Mask Option 1, length 4: 255.255.255.255
Domain-Name-Server Option 6, length 8: ns1.opcom.ru,ns2.opcom.ru
10:13:11.534525 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP (17), length 354)
0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 00:11:bb:e1:be:a9 (oui Unknown), length 326, xid 0xbbe1bea9, Flags [Broadcast]
Client-Ethernet-Address 00:11:bb:e1:be:a9 (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Request
Client-ID Option 61, length 7: ether 00:11:bb:e1:be:a9
Hostname Option 12, length 15: "SIP0011BBE1BEA9"
Vendor-Class Option 60, length 38: "Cisco Systems, Inc. IP Phone CP-7940G^@"
Requested-IP Option 50, length 4: 172.16.0.5
Parameter-Request Option 55, length 8:
Subnet-Mask, TFTP, Domain-Name-Server, Default-Gateway
Domain-Name, Option 150, AT, Option 151
10:13:11.534807 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 306)
172.16.0.1.bootps > 255.255.255.255.bootpc: BOOTP/DHCP, Reply, length 278, xid 0xbbe1bea9, Flags [Broadcast]
Your-IP 172.16.0.5
Client-Ethernet-Address 00:11:bb:e1:be:a9 (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Server-ID Option 54, length 4: 172.16.0.1
Lease-Time Option 51, length 4: 900
Default-Gateway Option 3, length 4: 172.16.0.1
Subnet-Mask Option 1, length 4: 255.255.255.255
Domain-Name-Server Option 6, length 8: ns1.opcom.ru,ns2.opcom.ru
Это уже, как видно, другая модель: Cisco 7940.