DPOD can be configured with two network interfaces:

1. First interface - for accessing DPOD's Web Console via web browser and DPOD's CLI via SSH.

2. Second interface - for communicating with the monitored devices.

Connect the Second Network Interface to the Server

Use your system administrator assistance to add a second network interface to your virtual machine or physical server.

In some cases, there will be a need to restart the server before the new network will be available.

After the server restarts, the operating system will automatically configure the new network interface using DHCP.

Log in to DPOD's Console or CLI via SSH with the user "root" and type the command "ifconfig". The command output should be similar to the following screenshot:

Open

The new network interface should be displayed as "eth1".

Configure the New Network Interface

1. Copy the network interface MAC address as displayed in the "ifconfig" command output after the attribute "ether":
   

2. Change directory to /etc/sysconfig/network-scripts:
   
   

   cd /etc/sysconfig/network-scripts

3. Duplicate eth0 (first network interface) network interface configuration file for the new network interface file (eth1):
   
   

   cp ifcfg-eth0 ifcfg-eth1

4. Edit the new file (ifcfg-eth1) and alter the following attributes based on the new network interface properties
   
   

   DEVICE=eth1 BOOTPROTO=static ONBOOT=yes NM_CONTROLLED=no HWADDR=00:0c:29:14:7a:88 IPADDR=192.168.1.178 NETMASK=255.255.255.0 USERCTL=no DNS1=8.8.8.8 DNS2=8.8.4.4 IFCONFIG_OPTS="txqueuelen 10000"

   
   DEVICE     : The network interface device name should be eth1
   HWADDR  : The network interface MAC address as displayed at section 1
   NETMASK : The network mask based on the new interface properties (the network administrator should supply this information)
   
   

5. Restart the network service by entering the following command:

   service network restart The output should be: Restarting network (via systemctl): [ OK ]

6. Use the command "ifconfig" to make sure the new network interface is up and configured with the correct IP address:
   

   
   If the new IP address is not displayed restart the server.

Configure Routing

In order to support the second network interface, a new routing table and routing rules should be defined.

Create New Routing Table

1. Edit the file /etc/iproute2/rt_tables and add new routing table entry with id "1" named "rt1":
   

2. In order to add new routing entry to the new routing table use the "ip route" command.
   This command will add new temporary entry to the routing table.
    

3. Add a default gateway entry (should be executed only once)
   
   

   ip route add default via <interface default gateway> dev <interface name> table <routing table name>

   
   Example: For adding the default gateway 192.168.1.1 to interface eth1:

   ip route add default via 192.168.1.1 dev eth1 table rt1
   Adding a default gateway to a network interface should be executed only once.

4. Add a routing entry (should be executed as needed for every monitored device):
   
   

   ip route add <destinamtion ip address or subnet> dev <interface name> table <routing table name>

   
   Example: For adding the route entry to subnet 192.168.1.x to interface eth1

   ip route add 192.168.1.0/24 dev eth1 table rt1
   Adding specific routing entry should be executed as needed for every monitored device

5. In order to make these entries permanent edit the file /etc/sysconfig/network-scripts/route-<interface name> and add the following:

   default via <interface default gateway> dev <interface name> table <routing table name> <destinamtion ip address or subnet> dev <interface name> table <routing table name>

   
   For example: Create new permanent routing file for interface eth1 and add the entries used at previous examples:

   default via 192.168.1.1 dev eth1 table rt1 192.168.1.0/24 dev eth1 table rt1

6. To confirm that the new routing table includes the new routing entries use the following command to display the content of the table:
   
   

   ip route show tab <routing table name>

   
   For example: To display the content of table rt1:
   
   

   ip route show tab rt1 The output should be: default via 192.168.1.1 dev eth1 192.168.1.0/24 dev eth1 scope link