Dns-Options

These scenarios check DHCP server DNS and name resolution options. This includes: dns-server, domain-name, and domain-search.

Test DNS-Server Single

Description

This scenario checks the dns-server option with a single DNS server. The DHCP server configures one DNS server, and the client receives it in the lease. The client’s /etc/resolv.conf should be updated with this nameserver.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.1/24
set service dhcp-server shared-network dns-single subnet 10.0.0.0/24 options dns-server 8.8.8.8
set service dhcp-server shared-network dns-single subnet 10.0.0.0/24 start 10.0.0.5 stop 10.0.0.5
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address dhcp
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Run command interfaces ethernet eth0 show at DUT1 and check if output contains the following tokens:

10.0.0.5

Step 4: Run command show monitor-db system dhcp interface eth0 dns-servers at DUT1 and expect this output:

Show output
8.8.8.8

Test DNS-Server Multiple

Description

This scenario checks the dns-server option with multiple DNS servers. The DHCP server configures three DNS servers, and the client receives all of them. The servers should appear in the client’s /etc/resolv.conf in the configured order.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.1/24
set service dhcp-server shared-network dns-multiple subnet 10.0.0.0/24 options dns-server 1.1.1.1
set service dhcp-server shared-network dns-multiple subnet 10.0.0.0/24 options dns-server 8.8.4.4
set service dhcp-server shared-network dns-multiple subnet 10.0.0.0/24 options dns-server 8.8.8.8
set service dhcp-server shared-network dns-multiple subnet 10.0.0.0/24 start 10.0.0.5 stop 10.0.0.5
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address dhcp
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Run command interfaces ethernet eth0 show at DUT1 and check if output contains the following tokens:

10.0.0.5

Step 4: Run command show monitor-db system dhcp interface eth0 dns-servers at DUT1 and expect this output:

Test DNS-Server VRF

Description

This scenario checks the dns-server option when the DHCP server is configured with VRF. Multiple DNS servers are configured in a VRF environment, and the client receives them correctly.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.1/24
set interfaces ethernet eth0 vrf VRF0
set service dhcp-server shared-network dns-vrf local-vrf VRF0
set service dhcp-server shared-network dns-vrf subnet 10.0.0.0/24 options dns-server 8.8.4.4
set service dhcp-server shared-network dns-vrf subnet 10.0.0.0/24 options dns-server 8.8.8.8
set service dhcp-server shared-network dns-vrf subnet 10.0.0.0/24 start 10.0.0.5 stop 10.0.0.5
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
set system vrf VRF0

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address dhcp
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Run command interfaces ethernet eth0 show at DUT1 and check if output contains the following tokens:

10.0.0.5

Step 4: Run command show monitor-db system dhcp interface eth0 dns-servers at DUT1 and expect this output:

Show output
8.8.8.8, 8.8.4.4

Test Domain-Name

Description

This scenario checks the domain-name option. The DHCP server configures a domain name, and the client receives it in the lease. The domain name should appear in the client’s /etc/resolv.conf.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.1/24
set service dhcp-server shared-network domain-name subnet 10.0.0.0/24 options domain-name example.com
set service dhcp-server shared-network domain-name subnet 10.0.0.0/24 start 10.0.0.5 stop 10.0.0.5
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address dhcp
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Run command interfaces ethernet eth0 show at DUT1 and check if output contains the following tokens:

10.0.0.5

Step 4: Run command show monitor-db system dhcp interface eth0 domain-name at DUT1 and expect this output:

Show output
example.com

Test Domain-Name VRF

Description

This scenario checks the domain-name option when the DHCP server is configured with VRF. The domain name is configured in a VRF environment, and the client receives it correctly.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.1/24
set interfaces ethernet eth0 vrf VRF0
set service dhcp-server shared-network domain-name-vrf local-vrf VRF0
set service dhcp-server shared-network domain-name-vrf subnet 10.0.0.0/24 options domain-name example.com
set service dhcp-server shared-network domain-name-vrf subnet 10.0.0.0/24 start 10.0.0.5 stop 10.0.0.5
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
set system vrf VRF0

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address dhcp
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Run command interfaces ethernet eth0 show at DUT1 and check if output contains the following tokens:

10.0.0.5

Step 4: Run command show monitor-db system dhcp interface eth0 domain-name at DUT1 and expect this output:

Show output
example.com

Test Change DNS-Server

Description

This scenario checks that DNS servers can be changed dynamically. Configure initial DNS servers, then change them and verify the client receives the new values.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.1/24
set service dhcp-server shared-network dns-single subnet 10.0.0.0/24 options dns-server 8.8.8.8
set service dhcp-server shared-network dns-single subnet 10.0.0.0/24 start 10.0.0.5 stop 10.0.0.5
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address dhcp
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Run command interfaces ethernet eth0 show at DUT1 and check if output contains the following tokens:

10.0.0.5

Step 4: Run command show monitor-db system dhcp interface eth0 dns-servers at DUT1 and expect this output:

Show output
8.8.8.8

Step 5: Modify the following configuration lines in DUT0 :

set service dhcp-server shared-network dns-single subnet 10.0.0.0/24 options dns-server 8.8.4.4

Step 6: Run command show monitor-db system dhcp interface eth0 dns-servers at DUT1 and expect this output:

Show output
8.8.8.8, 8.8.4.4

Test Change Domain-Name

Description

This scenario checks that the domain name can be changed dynamically. Configure an initial domain name, then change it and verify the client receives the new value.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.1/24
set service dhcp-server shared-network domain-name subnet 10.0.0.0/24 options domain-name example.com
set service dhcp-server shared-network domain-name subnet 10.0.0.0/24 start 10.0.0.5 stop 10.0.0.5
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address dhcp
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Run command interfaces ethernet eth0 show at DUT1 and check if output contains the following tokens:

10.0.0.5

Step 4: Run command show monitor-db system dhcp interface eth0 domain-name at DUT1 and expect this output:

Show output
example.com

Step 5: Modify the following configuration lines in DUT0 :

set service dhcp-server shared-network domain-name subnet 10.0.0.0/24 options domain-name test.com

Step 6: Run command show monitor-db system dhcp interface eth0 domain-name at DUT1 and expect this output:

Show output
test.com

Test Remove DNS-Server

Description

This scenario checks that DNS servers can be removed. Configure DNS servers, then remove them and verify they are no longer sent to the client.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.1/24
set service dhcp-server shared-network dns-multiple subnet 10.0.0.0/24 options dns-server 1.1.1.1
set service dhcp-server shared-network dns-multiple subnet 10.0.0.0/24 options dns-server 8.8.4.4
set service dhcp-server shared-network dns-multiple subnet 10.0.0.0/24 options dns-server 8.8.8.8
set service dhcp-server shared-network dns-multiple subnet 10.0.0.0/24 start 10.0.0.5 stop 10.0.0.5
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address dhcp
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Run command interfaces ethernet eth0 show at DUT1 and check if output contains the following tokens:

10.0.0.5

Step 4: Run command show monitor-db system dhcp interface eth0 dns-servers at DUT1 and expect this output:

Step 5: Modify the following configuration lines in DUT0 :

delete service dhcp-server shared-network dns-multiple subnet 10.0.0.0/24 options

Step 6: Run command show monitor-db system dhcp interface eth0 dns-servers at DUT1 and expect this output: