More verbose tcpdump data: ``` [tripleo-admin@controller-0 ~]$ sudo tcpdump -vvvv -i vlan50 port 67 or port 68 or port 69 or port 4011 dropped privs to tcpdump tcpdump: listening on vlan50, link-type EN10MB (Ethernet), snapshot length 262144 bytes 10:41:39.857818 IP (tos 0x0, ttl 64, id 51868, offset 0, flags [none], proto UDP (17), length 375) 0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:25:90:d5:bf:28 (oui Unknown), length 347, xid 0x4371427b, Flags [Broadcast] (0x8000) Client-Ethernet-Address 00:25:90:d5:bf:28 (oui Unknown) Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message (53), length 1: Discover MSZ (57), length 2: 1464 Parameter-Request (55), length 35: Subnet-Mask (1), Time-Zone (2), Default-Gateway (3), Time-Server (4) IEN-Name-Server (5), Domain-Name-Server (6), Hostname (12), BS (13) Domain-Name (15), RP (17), EP (18), RSZ (22) TTL (23), BR (28), YD (40), YS (41) NTP (42), Vendor-Option (43), Requested-IP (50), Lease-Time (51) Server-ID (54), RN (58), RB (59), Vendor-Class (60) TFTP (66), BF (67), GUID (97), Unknown (128) Unknown (129), Unknown (130), Unknown (131), Unknown (132) Unknown (133), Unknown (134), Unknown (135) GUID (97), length 17: 0.0.0.0.0.0.0.0.0.0.0.0.37.144.213.191.40 NDI (94), length 3: 1.3.16 ARCH (93), length 2: 7 Vendor-Class (60), length 32: "PXEClient:Arch:00007:UNDI:003016" END (255), length 0 10:41:43.602882 IP (tos 0x0, ttl 64, id 51869, offset 0, flags [none], proto UDP (17), length 387) 0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:25:90:d5:bf:28 (oui Unknown), length 359, xid 0x4371427b, Flags [Broadcast] (0x8000) Client-Ethernet-Address 00:25:90:d5:bf:28 (oui Unknown) Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message (53), length 1: Request Server-ID (54), length 4: 192.168.5.1 Requested-IP (50), length 4: 192.168.5.127 MSZ (57), length 2: 65280 Parameter-Request (55), length 35: Subnet-Mask (1), Time-Zone (2), Default-Gateway (3), Time-Server (4) IEN-Name-Server (5), Domain-Name-Server (6), Hostname (12), BS (13) Domain-Name (15), RP (17), EP (18), RSZ (22) TTL (23), BR (28), YD (40), YS (41) NTP (42), Vendor-Option (43), Requested-IP (50), Lease-Time (51) Server-ID (54), RN (58), RB (59), Vendor-Class (60) TFTP (66), BF (67), GUID (97), Unknown (128) Unknown (129), Unknown (130), Unknown (131), Unknown (132) Unknown (133), Unknown (134), Unknown (135) GUID (97), length 17: 0.0.0.0.0.0.0.0.0.0.0.0.37.144.213.191.40 NDI (94), length 3: 1.3.16 ARCH (93), length 2: 7 Vendor-Class (60), length 32: "PXEClient:Arch:00007:UNDI:003016" END (255), length 0 10:41:43.610692 IP (tos 0x0, ttl 64, id 51870, offset 0, flags [none], proto UDP (17), length 86) 192.168.5.127.direcpc-dll > controller-0.provisioning.openstack.lab.tftp: [udp sum ok] TFTP, length 58, RRQ "snponly.efiM-}^DM-@M-(^ELy^N M-)M-~M-)M-~M-@M-(^Ed" octet tsize 0 blksize 1468 ^C
```
More verbose tcpdump data: admin@controlle r-0 ~]$ sudo tcpdump -vvvv -i vlan50 port 67 or port 68 or port 69 or port 4011 255.255. bootps: [udp sum ok] BOOTP/DHCP, Request from 00:25:90:d5:bf:28 (oui Unknown), length 347, xid 0x4371427b, Flags [Broadcast] (0x8000)
Client- Ethernet- Address 00:25:90:d5:bf:28 (oui Unknown)
Vendor- rfc1048 Extensions
DHCP- Message (53), length 1: Discover
Parameter- Request (55), length 35:
Subnet- Mask (1), Time-Zone (2), Default-Gateway (3), Time-Server (4)
IEN-Name- Server (5), Domain-Name-Server (6), Hostname (12), BS (13)
Domain- Name (15), RP (17), EP (18), RSZ (22)
Server- ID (54), RN (58), RB (59), Vendor-Class (60)
Unknown (129), Unknown (130), Unknown (131), Unknown (132)
Unknown (133), Unknown (134), Unknown (135) 0.0.0.0. 0.0.0.0. 37.144. 213.191. 40
Vendor- Class (60), length 32: "PXEClient: Arch:00007: UNDI:003016" 255.255. bootps: [udp sum ok] BOOTP/DHCP, Request from 00:25:90:d5:bf:28 (oui Unknown), length 359, xid 0x4371427b, Flags [Broadcast] (0x8000)
Client- Ethernet- Address 00:25:90:d5:bf:28 (oui Unknown)
Vendor- rfc1048 Extensions
DHCP- Message (53), length 1: Request
Server- ID (54), length 4: 192.168.5.1
Requested- IP (50), length 4: 192.168.5.127
Parameter- Request (55), length 35:
Subnet- Mask (1), Time-Zone (2), Default-Gateway (3), Time-Server (4)
IEN-Name- Server (5), Domain-Name-Server (6), Hostname (12), BS (13)
Domain- Name (15), RP (17), EP (18), RSZ (22)
Server- ID (54), RN (58), RB (59), Vendor-Class (60)
Unknown (129), Unknown (130), Unknown (131), Unknown (132)
Unknown (133), Unknown (134), Unknown (135) 0.0.0.0. 0.0.0.0. 37.144. 213.191. 40
Vendor- Class (60), length 32: "PXEClient: Arch:00007: UNDI:003016" 168.5.127. direcpc- dll > controller- 0.provisioning. openstack. lab.tftp: [udp sum ok] TFTP, length 58, RRQ "snponly. efiM-}^ DM-@M-( ^ELy^N M-)M-~M- )M-~M-@ M-(^Ed" octet tsize 0 blksize 1468
```
[tripleo-
dropped privs to tcpdump
tcpdump: listening on vlan50, link-type EN10MB (Ethernet), snapshot length 262144 bytes
10:41:39.857818 IP (tos 0x0, ttl 64, id 51868, offset 0, flags [none], proto UDP (17), length 375)
0.0.0.0.bootpc > 255.255.
Magic Cookie 0x63825363
MSZ (57), length 2: 1464
TTL (23), BR (28), YD (40), YS (41)
NTP (42), Vendor-Option (43), Requested-IP (50), Lease-Time (51)
TFTP (66), BF (67), GUID (97), Unknown (128)
GUID (97), length 17: 0.0.0.0.
NDI (94), length 3: 1.3.16
ARCH (93), length 2: 7
END (255), length 0
10:41:43.602882 IP (tos 0x0, ttl 64, id 51869, offset 0, flags [none], proto UDP (17), length 387)
0.0.0.0.bootpc > 255.255.
Magic Cookie 0x63825363
MSZ (57), length 2: 65280
TTL (23), BR (28), YD (40), YS (41)
NTP (42), Vendor-Option (43), Requested-IP (50), Lease-Time (51)
TFTP (66), BF (67), GUID (97), Unknown (128)
GUID (97), length 17: 0.0.0.0.
NDI (94), length 3: 1.3.16
ARCH (93), length 2: 7
END (255), length 0
10:41:43.610692 IP (tos 0x0, ttl 64, id 51870, offset 0, flags [none], proto UDP (17), length 86)
192.
^C
```