Configuring a DHCP Server in Gaia Portal

Important:

  • Scalable Platform Security Groups do not support this feature (Known Limitation MBS-3246).

  • Starting in R81.20, you can configure DHCP Server setting in the context of a VSX Virtual System. See Configuring a DHCP Server in Gaia Clish.

Step

Instructions

1

In the navigation tree, click Network Management > DHCP Server.

2

In the DHCP Server Subnet Configuration section, click Add.

The Add DHCP window opens.

You now define a DHCP subnet on an Ethernet interface of the Gaia device.

Hosts behind the Gaia interface get IPv4 addresses from address pools in the subnet.

3

Select Enable DHCP to enable DHCP for the subnet you will configure.

4

On the Subnet tab:

Define the DHCP offer and lease settings:

4A

In the Network IP Address field, enter the IPv4 address of the applicable interface's subnet.

In the Subnet mask field, enter the subnet mask.

Note - To do this automatically, click Get from interface and select the applicable interface. Click OK.

4B

Optional:

In the Address Pool section, click Add to define the range of IPv4 addresses that the server assigns to hosts.

  1. In the Type field, select Include or Exclude.

    This specifies whether to include or exclude this range of IPv4 addresses in the IP pool.

  2. In the Status field, select Enable of Disable.

    This enables or disables the DHCP Server for this subnet, or the DHCP Server process (depending on the context).

  3. In the Start field, enter the first IPv4 address of the range.

  4. In the End field, enter the last IPv4 address of the range.

  5. Click OK.

4C

Optional:

In the Lease Configuration section, configure the DHCP lease settings:

  1. In the Default lease field, enter the default lease time for all IPv4 address in this IPv4 subnet.

    This applies only if DHCPv4 clients do not request a unique lease time.

    The default value in this field is 43,200 seconds.

    Valid values in this field are from 1 to the Maximum lease time.

  2. In the Maximum lease field, enter the maximum lease time for all IPv4 address in this IPv4 subnet.

    The default value in this field is 86,400 seconds.

    Valid values in this field are from 1 to 4,294,967,295 seconds.

5

Optional:

On the Routing & DNS tab, define routing and DNS parameters for DHCP clients:

  • In the Default Gateway field, enter the IPv4 address of the default gateway for the DHCP clients.

  • In the Domain Name field, enter the domain name for the DHCP clients (for example, example.com).

  • In the Primary DNS Server field, enter the IPv4 address of the Primary DNS server for the DHCP clients.

  • In the Secondary DNS Server field, enter the IPv4 address of the Secondary DNS server for the DHCP clients (to use if the primary DNS server does not respond).

  • In the Tertiary DNS Server field, enter the IPv4 address of the Tertiary DNS server for the DHCP clients (to use if the primary and secondary DNS servers do not respond).

6

Click OK.

7

Optional: Define DHCP subnets on other Gaia interfaces, as needed.

8

In the DHCP Server Configuration section, select Enable DHCP Server and click Apply.

9

The DHCP server on Gaia is now configured and enabled.

You can now configure your network hosts to get their network parameters from the DHCP server on Gaia.

Step

Instructions

1

In the navigation tree, click Network Management > DHCP Server.

2

In the DHCP Server Subnet Configuration section, select the Subnet and click Edit.

3

Change the applicable settings.

4

Click OK.

Step

Instructions

1

In the navigation tree, click Network Management > DHCP Server.

2

In the DHCP Server Configuration section, clear the Enable DHCP Server.

3

Click Apply.

Step

Instructions

1

In the navigation tree, click Network Management > DHCP Server.

2

In the DHCP Server Subnet Configuration section, select the Subnet and click Delete.

3

Click OK to confirm.

Note - Before you delete the last DHCP subnet, you must disable DHCP server on all interfaces.