Etude de trame d'un renouvellement de bail Envoi ... - Cours IG

192.168.1.21 DHCP DHCP Discover - Transaction. ID 0xca730547. Frame 1 (342 bytes on wire, 342 bytes captured). Ethernet II, Src: Vmware_b6:c1:86 ...
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Etude de trame d’un renouvellement de bail

 Envoi Discover de Client en broadcast

No.

Time

Source

3 10.991756

0.0.0.0

Destination 255.255.255.255

Protocol DHCP

Info

DHCP Discover - Transaction ID

0xca730547

Frame 3 (342 bytes on wire, 342 bytes captured) Ethernet II, Src: Vmware_ea:10:85 (00:0c:29:ea:10:85), Dst: Broadcast (ff:ff:ff:ff:ff:ff) Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255 (255.255.255.255) User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67) Bootstrap Protocol Message type: Boot Request (1) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0xca730547 Seconds elapsed: 11 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 0.0.0.0 (0.0.0.0) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 0.0.0.0 (0.0.0.0) Client MAC address: Vmware_ea:10:85 (00:0c:29:ea:10:85)

 Interface (Relay) reçoit le Discover du client :

No.

Time

1 0.000000

Source

Destination

0.0.0.0

255.255.255.255

Protocol Info DHCP

DHCP Discover - Transaction ID 0xca730547

Frame 1 (342 bytes on wire, 342 bytes captured) Ethernet II, Src: Vmware_ea:10:85 (00:0c:29:ea:10:85), Dst: Broadcast (ff:ff:ff:ff:ff:ff) Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255 (255.255.255.255) Identification: 0x9bea (39914) Protocol: UDP (0x11) Source: 0.0.0.0 (0.0.0.0) Destination: 255.255.255.255 (255.255.255.255) Bootstrap Protocol Message type: Boot Request (1) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0xca730547 Seconds elapsed: 0 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 0.0.0.0 (0.0.0.0) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 0.0.0.0 (0.0.0.0) Client MAC address: Vmware_ea:10:85 (00:0c:29:ea:10:85)

 Interface (Relay) envoi le Discover au serveur DHCP :

No.

Time

Source

1 0.000000 10.0.0.1 ID 0xca730547

Destination 192.168.1.21

Protocol Info DHCP

DHCP Discover - Transaction

Frame 1 (342 bytes on wire, 342 bytes captured) Ethernet II, Src: Vmware_b6:c1:86 (00:0c:29:b6:c1:86), Dst: Vmware_40:76:04 (00:0c:29:40:76:04) Internet Protocol, Src: 10.0.0.1 (10.0.0.1), Dst: 192.168.1.21 (192.168.1.21) Identification: 0xba83 (47747) Protocol: UDP (0x11) Source: 10.0.0.1 (10.0.0.1) Destination: 192.168.1.21 (192.168.1.21) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67) Bootstrap Protocol Message type: Boot Request (1) Hardware type: Ethernet Hardware address length: 6 Hops: 1 Transaction ID: 0xca730547 Seconds elapsed: 11 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 0.0.0.0 (0.0.0.0) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 10.0.0.1 (10.0.0.1) Client MAC address: Vmware_ea:10:85 (00:0c:29:ea:10:85)

 Envoi offer de serveur DHCP à agent relay (10.0.0.1) No.

Time

Source

2 0.000344 192.168.1.21 0xca730547

Destination 10.0.0.1

Protocol Info DHCP

DHCP Offer - Transaction ID

Frame 2 (342 bytes on wire, 342 bytes captured) Ethernet II, Src: Vmware_40:76:04 (00:0c:29:40:76:04), Dst: Vmware_b6:c1:86 (00:0c:29:b6:c1:86) Internet Protocol, Src: 192.168.1.21 (192.168.1.21), Dst: 10.0.0.1 (10.0.0.1) Identification: 0x62ea (25322) Protocol: UDP (0x11) Source: 192.168.1.21 (192.168.1.21) Destination: 10.0.0.1 (10.0.0.1) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67) Bootstrap Protocol Message type: Boot Reply (2) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0xca730547 Seconds elapsed: 0 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 10.0.0.2 (10.0.0.2) Next server IP address: 192.168.1.21 (192.168.1.21) Relay agent IP address: 10.0.0.1 (10.0.0.1) Client MAC address: Vmware_ea:10:85 (00:0c:29:ea:10:85)

 Agent relay redirige l’offer du serveur DHCP client

No.

Time

Source

4 10.993462 10.0.0.1 0xca730547

Destination 10.0.0.2

Protocol Info DHCP

DHCP Offer - Transaction ID

Frame 4 (342 bytes on wire, 342 bytes captured) Ethernet II, Src: Vmware_b6:c1:7c (00:0c:29:b6:c1:7c), Dst: Vmware_ea:10:85 (00:0c:29:ea:10:85) Internet Protocol, Src: 10.0.0.1 (10.0.0.1), Dst: 10.0.0.2 (10.0.0.2) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68) Bootstrap Protocol Message type: Boot Reply (2) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0xca730547 Seconds elapsed: 0 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 10.0.0.2 (10.0.0.2) Next server IP address: 192.168.1.21 (192.168.1.21) Relay agent IP address: 10.0.0.1 (10.0.0.1) Client MAC address: Vmware_ea:10:85 (00:0c:29:ea:10:85)

 Le client envoi une request au serveur DHCP

No.

Time

Source

5 10.993712 0.0.0.0 ID 0xca730547

Destination 255.255.255.255

Protocol Info DHCP

DHCP Request - Transaction

Frame 5 (355 bytes on wire, 355 bytes captured) Ethernet II, Src: Vmware_ea:10:85 (00:0c:29:ea:10:85), Dst: Broadcast (ff:ff:ff:ff:ff:ff) Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255 (255.255.255.255) User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67) Bootstrap Protocol Message type: Boot Request (1) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0xca730547 Seconds elapsed: 11 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 0.0.0.0 (0.0.0.0) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 0.0.0.0 (0.0.0.0) Client MAC address: Vmware_ea:10:85 (00:0c:29:ea:10:85)

 Le relay dhcp recoit la resquest et la redirige sur le serveur DHCP

No.

Time

Source

3 0.001783 10.0.0.1 0xca730547

Destination 192.168.1.21

Protocol Info DHCP

DHCP Request - Transaction ID

Frame 3 (355 bytes on wire, 355 bytes captured) Ethernet II, Src: Vmware_b6:c1:86 (00:0c:29:b6:c1:86), Dst: Vmware_40:76:04 (00:0c:29:40:76:04) Internet Protocol, Src: 10.0.0.1 (10.0.0.1), Dst: 192.168.1.21 (192.168.1.21) Identification: 0xba85 (47749) Protocol: UDP (0x11) Source: 10.0.0.1 (10.0.0.1) Destination: 192.168.1.21 (192.168.1.21) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67) Bootstrap Protocol Message type: Boot Request (1) Hardware type: Ethernet Hardware address length: 6 Hops: 1 Transaction ID: 0xca730547 Seconds elapsed: 11 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 0.0.0.0 (0.0.0.0) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 10.0.0.1 (10.0.0.1) Client MAC address: Vmware_ea:10:85 (00:0c:29:ea:10:85)

 Le serveur DHCP envoi un ACK au relay DHCP

No.

Time

Source

Destination

4 0.002128 192.168.1.21 0xca730547

10.0.0.1

Protocol Info DHCP

DHCP ACK

- Transaction ID

Frame 4 (342 bytes on wire, 342 bytes captured) Ethernet II, Src: Vmware_40:76:04 (00:0c:29:40:76:04), Dst: Vmware_b6:c1:86 (00:0c:29:b6:c1:86) Internet Protocol, Src: 192.168.1.21 (192.168.1.21), Dst: 10.0.0.1 (10.0.0.1) Identification: 0x62eb (25323) Protocol: UDP (0x11) Source: 192.168.1.21 (192.168.1.21) Destination: 10.0.0.1 (10.0.0.1) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67) Bootstrap Protocol Message type: Boot Reply (2) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0xca730547 Seconds elapsed: 0 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 10.0.0.2 (10.0.0.2) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 10.0.0.1 (10.0.0.1) Client MAC address: Vmware_ea:10:85 (00:0c:29:ea:10:85)

 L’agent relay redirige le ACK vers le client

No.

Time

Source

6 10.994737 10.0.0.1 0xca730547

Destination 10.0.0.2

Protocol Info DHCP

DHCP ACK

- Transaction ID

Frame 6 (342 bytes on wire, 342 bytes captured) Ethernet II, Src: Vmware_b6:c1:7c (00:0c:29:b6:c1:7c), Dst: Vmware_ea:10:85 (00:0c:29:ea:10:85) Internet Protocol, Src: 10.0.0.1 (10.0.0.1), Dst: 10.0.0.2 (10.0.0.2) Identification: 0xba86 (47750) Protocol: UDP (0x11) Header checksum: 0x0000 [incorrect, should be 0x6b1c] Source: 10.0.0.1 (10.0.0.1) Destination: 10.0.0.2 (10.0.0.2) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68) Bootstrap Protocol Message type: Boot Reply (2) Hardware type: Ethernet Hardware address length: 6 Transaction ID: 0xca730547 Seconds elapsed: 0 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 10.0.0.2 (10.0.0.2) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 10.0.0.1 (10.0.0.1) Client MAC address: Vmware_ea:10:85 (00:0c:29:ea:10:85)

 Le client l’ACK redirigé par l’agent relay

No.

Time

Source

6 10.994925 10.0.0.1 0xca730547

Destination 10.0.0.2

Protocol Info DHCP

DHCP ACK

- Transaction ID

Frame 6 (342 bytes on wire, 342 bytes captured) Ethernet II, Src: Vmware_b6:c1:7c (00:0c:29:b6:c1:7c), Dst: Vmware_ea:10:85 (00:0c:29:ea:10:85) Internet Protocol, Src: 10.0.0.1 (10.0.0.1), Dst: 10.0.0.2 (10.0.0.2) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68) Bootstrap Protocol Message type: Boot Reply (2) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0xca730547 Seconds elapsed: 0 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 10.0.0.2 (10.0.0.2) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 10.0.0.1 (10.0.0.1) Client MAC address: Vmware_ea:10:85 (00:0c:29:ea:10:85)