Host Routes

Host routes let you insert entries into the Oracle® Enterprise Session Border Controller's routing table. These routes affect traffic that originates at the Oracle® Enterprise Session Border Controller’s host process. Host routes are used primarily for steering management traffic to the correct network.

When traffic is destined for a network that is not explicitly defined on a Oracle® Enterprise Session Border Controller, the default gateway (located in the system-config) is used. If you try to route traffic to a specific destination that is not accessible through the default gateway, you need to add a host route. Host routes can be thought of as a default gateway override.

Certain SIP configurations require that the default gateway is located on a media interface. In this scenario, if management applications are located on a network connected to an administrative network, you will need to add a host route for management connectivity.

When source-based routing is used, the default gateway must exist on a media interface. Host routes might be needed to reach management applications connected to a management port in this kind of situation as well.

Note:

Do not configure a host-route, gateway with an address already used for any existing network-interface, gateway.

Host Routes Example

When you enable SIP signaling over media interfaces, the default gateway uses an IPv4 address assigned to a media interface. Maintenance services (SNMP and Radius) are located on a network connected to, but separate from, the 192.168.1.0/24 network on wancom0. To route Radius or SNMP traffic to an NMS (labeled as SNMP in the following example), a host route entry must be a part of the Oracle® Enterprise Session Border Controller configuration. The host route tells the host how to reach the 172.16.0.0/16 network. The actual configuration is shown in the example in the next section of this guide.

Host Route Configuration

To configure a host route:

1. Access the host-route configuration element.

   ORACLE# configure terminal
   ORACLE(configure)# system
   ORACLE(system)# host-route
   ORACLE(host-route)# 

2. dest-network—Set the IP address of the destination network that this host route points toward.
3. netmask—Set the netmask portion of the destination network for the route you are creating. The netmask is in dotted decimal notation.
4. gateway—Set the gateway that traffic destined for the address defined in the first two elements should use as its first hop.
5. Type done to save your configuration.