Dhcp Address

This scenario shows how to obtain an IP address over DHCP (Dynamic Host Configuration Protocol).

Test DHCP client

Description

DUT0 is configured to obtain an IP address over DHCP.

Scenario

Step 1: Set the following configuration in DUT1:

set interfaces ethernet eth0 address 192.168.100.1/24
set interfaces dummy dum0 address 10.0.0.1/24
set service dhcp-server shared-network dhcpserver subnet 192.168.100.0/24 options default-router 192.168.100.1
set service dhcp-server shared-network dhcpserver subnet 192.168.100.0/24 start 192.168.100.50 stop 192.168.100.50

Step 2: Set the following configuration in DUT0:

set interfaces ethernet eth0 address dhcp

Step 3: Run command interfaces ethernet show at DUT0 and check if output contains the following tokens:

192.168.100.50/24

Show output

-----------------------------------------------------------------
Name           IP Address           Admin  Oper  Vrf  Description
-----------------------------------------------------------------
eth0  192.168.100.50/24             up     up
      fe80::dcad:beff:feef:6c10/64
eth1                                down   down

Step 4: Run command service dhcp-client show leases interface eth0 at DUT0 and check if output contains the following tokens:

192.168.100.50

Show output

Interface:     eth0
IP address:    192.168.100.50
Subnet mask:   255.255.255.0
Routers:       192.168.100.1
Name-servers:
Domain-name:
NTP servers:
DHCP server:   192.168.100.1
Lease time:    43200
Expiry date:   Thu Jan 25 13:19:53 2024
Reason:        BOUND

Step 5: Run command protocols ip show route at DUT0 and check if output matches the following regular expressions:

S>.*0\.0\.0\.0\/0.*via 192.168.100.1, eth0.*

Show output

Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
       f - OpenFabric,
       > - selected route, * - FIB route, q - queued, r - rejected, b - backup
       t - trapped, o - offload failure

S>* 0.0.0.0/0 [1/0] via 192.168.100.1, eth0, weight 1, 00:00:01
C>* 192.168.100.0/24 is directly connected, eth0, 00:00:01

Step 6: Ping IP address 192.168.100.1 from DUT0:

admin@DUT0$ ping 192.168.100.1 count 1 size 56 timeout 1

Show output

PING 192.168.100.1 (192.168.100.1) 56(84) bytes of data.
64 bytes from 192.168.100.1: icmp_seq=1 ttl=64 time=0.621 ms

--- 192.168.100.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.621/0.621/0.621/0.000 ms

Step 7: Ping IP address 10.0.0.1 from DUT0:

admin@DUT0$ ping 10.0.0.1 count 1 size 56 timeout 1

Show output

PING 10.0.0.1 (10.0.0.1) 56(84) bytes of data.
64 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=0.372 ms

--- 10.0.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.372/0.372/0.372/0.000 ms

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