I probably should have done numeric tcpdump output. Here's both again. tcpdump: WARNING: snaplen raised from 116 to 1500 22:36:40.276682 0.0.0.0.68 > 255.255.255.255.67: xid:0x74253f08 vend-rfc1048 DHCP:REQUEST HN:"sarah" CID:1.220.159.219.40.20.191 PR:SM+DG+NS+HN+DN+BR+119+121 RQ:202.63.67.36 [tos 0x10] 22:36:40.327371 202.63.66.1.67 > 255.255.255.255.68: xid:0x74253f08 flags:0x8000 Y:202.63.67.36 S:172.21.116.42 ether dc:9f:db:28:14:bf vend-rfc1048 DHCP:ACK SM:255.255.254.0 DG:202.63.66.1 NS:119.40.106.35,119.40.106.36 NTP:125.253.59.254 LT:600 SID:202.63.66.1 CID:1.220.159.219.40.20.191 [tos 0xc0] 22:41:40.422661 202.63.67.36.56480 > 202.63.66.1.67: (request) xid:0xa180ce6b C:202.63.67.36 vend-rfc1048 DHCP:REQUEST HN:"sarah" CID:1.220.159.219.40.20.191 PR:SM+DG+NS+HN+DN+BR+119+121 22:41:40.434534 202.63.66.1.67 > 202.63.67.36.68: xid:0xa180ce6b C:202.63.67.36 S:172.21.116.42 vend-rfc1048 DHCP:NACK SID:202.63.66.1 CID:1.220.159.219.40.20.191 [tos 0xc0] 22:41:40.442012 0.0.0.0.68 > 255.255.255.255.67: xid:0x6a13ec33 vend-rfc1048 DHCP:DISCOVER HN:"sarah" CID:1.220.159.219.40.20.191 PR:SM+DG+NS+HN+DN+BR+119+121 [tos 0x10] 22:41:41.532272 0.0.0.0.68 > 255.255.255.255.67: xid:0x6a13ec33 vend-rfc1048 DHCP:DISCOVER HN:"sarah" CID:1.220.159.219.40.20.191 PR:SM+DG+NS+HN+DN+BR+119+121 [tos 0x10] 22:41:41.653804 202.63.66.1.67 > 255.255.255.255.68: xid:0x6a13ec33 flags:0x8000 Y:202.63.67.36 S:172.21.116.42 ether dc:9f:db:28:14:bf vend-rfc1048 DHCP:OFFER SM:255.255.254.0 DG:202.63.66.1 NS:119.40.106.35,119.40.106.36 NTP:125.253.59.254 LT:600 SID:202.63.66.1 CID:1.220.159.219.40.20.191 [tos 0xc0] 22:41:41.658881 0.0.0.0.68 > 255.255.255.255.67: xid:0xdafa3da4 vend-rfc1048 DHCP:REQUEST HN:"sarah" CID:1.220.159.219.40.20.191 PR:SM+DG+NS+HN+DN+BR+119+121 RQ:202.63.67.36 SID:202.63.66.1 [tos 0x10] 22:41:42.414218 202.63.66.1.67 > 255.255.255.255.68: xid:0xdafa3da4 flags:0x8000 Y:202.63.67.36 S:172.21.116.42 ether dc:9f:db:28:14:bf vend-rfc1048 DHCP:ACK SM:255.255.254.0 DG:202.63.66.1 NS:119.40.106.35,119.40.106.36 NTP:125.253.59.254 LT:600 SID:202.63.66.1 CID:1.220.159.219.40.20.191 [tos 0xc0] 22:46:42.512451 202.63.67.36.63976 > 202.63.66.1.67: (request) xid:0x953f83f1 C:202.63.67.36 vend-rfc1048 DHCP:REQUEST HN:"sarah" CID:1.220.159.219.40.20.191 PR:SM+DG+NS+HN+DN+BR+119+121 22:46:42.525222 202.63.66.1.67 > 202.63.67.36.68: xid:0x953f83f1 C:202.63.67.36 S:172.21.116.42 vend-rfc1048 DHCP:NACK SID:202.63.66.1 CID:1.220.159.219.40.20.191 [tos 0xc0] 22:46:42.531574 0.0.0.0.68 > 255.255.255.255.67: xid:0x66009a6e vend-rfc1048 DHCP:DISCOVER HN:"sarah" CID:1.220.159.219.40.20.191 PR:SM+DG+NS+HN+DN+BR+119+121 [tos 0x10] 22:46:43.622162 0.0.0.0.68 > 255.255.255.255.67: xid:0x66009a6e vend-rfc1048 DHCP:DISCOVER HN:"sarah" CID:1.220.159.219.40.20.191 PR:SM+DG+NS+HN+DN+BR+119+121 [tos 0x10] 22:46:43.762685 202.63.66.1.67 > 255.255.255.255.68: xid:0x66009a6e flags:0x8000 Y:202.63.67.36 S:172.21.116.42 ether dc:9f:db:28:14:bf vend-rfc1048 DHCP:OFFER SM:255.255.254.0 DG:202.63.66.1 NS:119.40.106.35,119.40.106.36 NTP:125.253.59.254 LT:600 SID:202.63.66.1 CID:1.220.159.219.40.20.191 [tos 0xc0] 22:46:43.768051 0.0.0.0.68 > 255.255.255.255.67: xid:0xfe3d764f vend-rfc1048 DHCP:REQUEST HN:"sarah" CID:1.220.159.219.40.20.191 PR:SM+DG+NS+HN+DN+BR+119+121 RQ:202.63.67.36 SID:202.63.66.1 [tos 0x10] 22:46:44.526556 202.63.66.1.67 > 255.255.255.255.68: xid:0xfe3d764f flags:0x8000 Y:202.63.67.36 S:172.21.116.42 ether dc:9f:db:28:14:bf vend-rfc1048 DHCP:ACK SM:255.255.254.0 DG:202.63.66.1 NS:119.40.106.35,119.40.106.36 NTP:125.253.59.254 LT:600 SID:202.63.66.1 CID:1.220.159.219.40.20.191 [tos 0xc0]
state_transition[cnmac2] Down -> Rebooting, timo: 1 DHCPREQUEST on cnmac2 parse_dhcp, from: 0e:a2:00:04:00:03, to: ff:ff:ff:ff:ff:ff parse_dhcp: 202.63.66.1:67 -> 255.255.255.255:68 dhcp_hdr op: Boot Reply (2) dhcp_hdr htype: Ethernet (1) dhcp_hdr hlen: 6 dhcp_hdr hops: 0 dhcp_hdr xid: 0x74253f08 dhcp_hdr secs: 0 dhcp_hdr flags: 0x8000 dhcp_hdr ciaddr: 0.0.0.0 dhcp_hdr yiaddr: 202.63.67.36 dhcp_hdr siaddr: 172.21.116.42 dhcp_hdr giaddr: 0.0.0.0 dhcp_hdr chaddr: dc:9f:db:28:14:bf (00000000000000000000) DHO_DHCP_MESSAGE_TYPE: DHCPACK DHO_SUBNET_MASK: 255.255.254.0 DHO_ROUTER: 202.63.66.1 DHO_DOMAIN_NAME_SERVERS: 119.40.106.35 (1/2) DHO_DOMAIN_NAME_SERVERS: 119.40.106.36 (2/2) DHO_42, len: 4 DHO_DHCP_LEASE_TIME 600s DHO_DHCP_SERVER_IDENTIFIER: 202.63.66.1 DHO_END DHCPACK on cnmac2 from 0e:a2:00:04:00:03/202.63.66.1 to ff:ff:ff:ff:ff:ff/255.255.255.255 adding 202.63.67.36 to cnmac2 (lease from 202.63.66.1) adding nameservers 119.40.106.35 119.40.106.36 (lease from 202.63.66.1 on cnmac2) state_transition[cnmac2] Rebooting -> Bound, timo: 300 configure_interface cnmac2 iface_timeout[3]: Bound state_transition[cnmac2] Bound -> Renewing, timo: 112 DHCPREQUEST on cnmac2 parse_dhcp, from: 0e:a2:00:04:00:03, to: dc:9f:db:28:14:bf parse_dhcp: 202.63.66.1:67 -> 202.63.67.36:68 dhcp_hdr op: Boot Reply (2) dhcp_hdr htype: Ethernet (1) dhcp_hdr hlen: 6 dhcp_hdr hops: 0 dhcp_hdr xid: 0xa180ce6b dhcp_hdr secs: 0 dhcp_hdr flags: 0x0 dhcp_hdr ciaddr: 202.63.67.36 dhcp_hdr yiaddr: 0.0.0.0 dhcp_hdr siaddr: 172.21.116.42 dhcp_hdr giaddr: 0.0.0.0 dhcp_hdr chaddr: dc:9f:db:28:14:bf (00000000000000000000) DHO_DHCP_MESSAGE_TYPE: DHCPNAK DHO_DHCP_SERVER_IDENTIFIER: 202.63.66.1 DHO_END DHCPNAK on cnmac2 from 0e:a2:00:04:00:03/202.63.66.1 to dc:9f:db:28:14:bf/202.63.67.36 deleting nameservers 119.40.106.35 119.40.106.36 (lease from 202.63.66.1 on cnmac2) deleting 202.63.67.36 from cnmac2 (lease from 202.63.66.1) state_transition[cnmac2] Renewing -> Init, timo: 1 DHCPDISCOVER on cnmac2 deconfigure_interface cnmac2 iface_timeout[3]: Init state_transition[cnmac2] Init -> Init, timo: 2 DHCPDISCOVER on cnmac2 parse_dhcp, from: 0e:a2:00:04:00:03, to: ff:ff:ff:ff:ff:ff parse_dhcp: 202.63.66.1:67 -> 255.255.255.255:68 dhcp_hdr op: Boot Reply (2) dhcp_hdr htype: Ethernet (1) dhcp_hdr hlen: 6 dhcp_hdr hops: 0 dhcp_hdr xid: 0x6a13ec33 dhcp_hdr secs: 0 dhcp_hdr flags: 0x8000 dhcp_hdr ciaddr: 0.0.0.0 dhcp_hdr yiaddr: 202.63.67.36 dhcp_hdr siaddr: 172.21.116.42 dhcp_hdr giaddr: 0.0.0.0 dhcp_hdr chaddr: dc:9f:db:28:14:bf (00000000000000000000) DHO_DHCP_MESSAGE_TYPE: DHCPOFFER DHO_SUBNET_MASK: 255.255.254.0 DHO_ROUTER: 202.63.66.1 DHO_DOMAIN_NAME_SERVERS: 119.40.106.35 (1/2) DHO_DOMAIN_NAME_SERVERS: 119.40.106.36 (2/2) DHO_42, len: 4 DHO_DHCP_LEASE_TIME 600s DHO_DHCP_SERVER_IDENTIFIER: 202.63.66.1 DHO_END DHCPOFFER on cnmac2 from 0e:a2:00:04:00:03/202.63.66.1 to ff:ff:ff:ff:ff:ff/255.255.255.255 state_transition[cnmac2] Init -> Requesting, timo: 1 DHCPREQUEST on cnmac2 parse_dhcp, from: 0e:a2:00:04:00:03, to: ff:ff:ff:ff:ff:ff parse_dhcp: 202.63.66.1:67 -> 255.255.255.255:68 dhcp_hdr op: Boot Reply (2) dhcp_hdr htype: Ethernet (1) dhcp_hdr hlen: 6 dhcp_hdr hops: 0 dhcp_hdr xid: 0xdafa3da4 dhcp_hdr secs: 0 dhcp_hdr flags: 0x8000 dhcp_hdr ciaddr: 0.0.0.0 dhcp_hdr yiaddr: 202.63.67.36 dhcp_hdr siaddr: 172.21.116.42 dhcp_hdr giaddr: 0.0.0.0 dhcp_hdr chaddr: dc:9f:db:28:14:bf (00000000000000000000) DHO_DHCP_MESSAGE_TYPE: DHCPACK DHO_SUBNET_MASK: 255.255.254.0 DHO_ROUTER: 202.63.66.1 DHO_DOMAIN_NAME_SERVERS: 119.40.106.35 (1/2) DHO_DOMAIN_NAME_SERVERS: 119.40.106.36 (2/2) DHO_42, len: 4 DHO_DHCP_LEASE_TIME 600s DHO_DHCP_SERVER_IDENTIFIER: 202.63.66.1 DHO_END DHCPACK on cnmac2 from 0e:a2:00:04:00:03/202.63.66.1 to ff:ff:ff:ff:ff:ff/255.255.255.255 adding 202.63.67.36 to cnmac2 (lease from 202.63.66.1) adding nameservers 119.40.106.35 119.40.106.36 (lease from 202.63.66.1 on cnmac2) state_transition[cnmac2] Requesting -> Bound, timo: 300 configure_interface cnmac2 iface_timeout[3]: Bound state_transition[cnmac2] Bound -> Renewing, timo: 112 DHCPREQUEST on cnmac2 parse_dhcp, from: 0e:a2:00:04:00:03, to: dc:9f:db:28:14:bf parse_dhcp: 202.63.66.1:67 -> 202.63.67.36:68 dhcp_hdr op: Boot Reply (2) dhcp_hdr htype: Ethernet (1) dhcp_hdr hlen: 6 dhcp_hdr hops: 0 dhcp_hdr xid: 0x953f83f1 dhcp_hdr secs: 0 dhcp_hdr flags: 0x0 dhcp_hdr ciaddr: 202.63.67.36 dhcp_hdr yiaddr: 0.0.0.0 dhcp_hdr siaddr: 172.21.116.42 dhcp_hdr giaddr: 0.0.0.0 dhcp_hdr chaddr: dc:9f:db:28:14:bf (00000000000000000000) DHO_DHCP_MESSAGE_TYPE: DHCPNAK DHO_DHCP_SERVER_IDENTIFIER: 202.63.66.1 DHO_END DHCPNAK on cnmac2 from 0e:a2:00:04:00:03/202.63.66.1 to dc:9f:db:28:14:bf/202.63.67.36 deleting nameservers 119.40.106.35 119.40.106.36 (lease from 202.63.66.1 on cnmac2) deleting 202.63.67.36 from cnmac2 (lease from 202.63.66.1) state_transition[cnmac2] Renewing -> Init, timo: 1 DHCPDISCOVER on cnmac2 deconfigure_interface cnmac2 iface_timeout[3]: Init state_transition[cnmac2] Init -> Init, timo: 2 DHCPDISCOVER on cnmac2 parse_dhcp, from: 0e:a2:00:04:00:03, to: ff:ff:ff:ff:ff:ff parse_dhcp: 202.63.66.1:67 -> 255.255.255.255:68 dhcp_hdr op: Boot Reply (2) dhcp_hdr htype: Ethernet (1) dhcp_hdr hlen: 6 dhcp_hdr hops: 0 dhcp_hdr xid: 0x66009a6e dhcp_hdr secs: 0 dhcp_hdr flags: 0x8000 dhcp_hdr ciaddr: 0.0.0.0 dhcp_hdr yiaddr: 202.63.67.36 dhcp_hdr siaddr: 172.21.116.42 dhcp_hdr giaddr: 0.0.0.0 dhcp_hdr chaddr: dc:9f:db:28:14:bf (00000000000000000000) DHO_DHCP_MESSAGE_TYPE: DHCPOFFER DHO_SUBNET_MASK: 255.255.254.0 DHO_ROUTER: 202.63.66.1 DHO_DOMAIN_NAME_SERVERS: 119.40.106.35 (1/2) DHO_DOMAIN_NAME_SERVERS: 119.40.106.36 (2/2) DHO_42, len: 4 DHO_DHCP_LEASE_TIME 600s DHO_DHCP_SERVER_IDENTIFIER: 202.63.66.1 DHO_END DHCPOFFER on cnmac2 from 0e:a2:00:04:00:03/202.63.66.1 to ff:ff:ff:ff:ff:ff/255.255.255.255 state_transition[cnmac2] Init -> Requesting, timo: 1 DHCPREQUEST on cnmac2 parse_dhcp, from: 0e:a2:00:04:00:03, to: ff:ff:ff:ff:ff:ff parse_dhcp: 202.63.66.1:67 -> 255.255.255.255:68 dhcp_hdr op: Boot Reply (2) dhcp_hdr htype: Ethernet (1) dhcp_hdr hlen: 6 dhcp_hdr hops: 0 dhcp_hdr xid: 0xfe3d764f dhcp_hdr secs: 0 dhcp_hdr flags: 0x8000 dhcp_hdr ciaddr: 0.0.0.0 dhcp_hdr yiaddr: 202.63.67.36 dhcp_hdr siaddr: 172.21.116.42 dhcp_hdr giaddr: 0.0.0.0 dhcp_hdr chaddr: dc:9f:db:28:14:bf (00000000000000000000) DHO_DHCP_MESSAGE_TYPE: DHCPACK DHO_SUBNET_MASK: 255.255.254.0 DHO_ROUTER: 202.63.66.1 DHO_DOMAIN_NAME_SERVERS: 119.40.106.35 (1/2) DHO_DOMAIN_NAME_SERVERS: 119.40.106.36 (2/2) DHO_42, len: 4 DHO_DHCP_LEASE_TIME 600s DHO_DHCP_SERVER_IDENTIFIER: 202.63.66.1 DHO_END DHCPACK on cnmac2 from 0e:a2:00:04:00:03/202.63.66.1 to ff:ff:ff:ff:ff:ff/255.255.255.255 adding 202.63.67.36 to cnmac2 (lease from 202.63.66.1) adding nameservers 119.40.106.35 119.40.106.36 (lease from 202.63.66.1 on cnmac2) state_transition[cnmac2] Requesting -> Bound, timo: 300 configure_interface cnmac2
