Net-Net 3810
 
Acme Packet 4500
 
Acme Packet 3820
 

PLA-Support>Sun Systems>CommsGBU>Session Delivery Network>SN-SND: Acme Service Provider
 

In this Document

Goal

Solution

Applies to:

Goal

This document explains how "Source Based Routing" is implemented within an Oracle AP Session Border Controller (SBC).

Solution

The SBC's way of implementing source-based routing (SBR) is as follows:

When the SBC needs to route a packet, it consults the route table ('show routes' will provide that info). If the route lookup results in a match that associates with the interface wancom0, wancom1, or wancom2, then the packet is sent using that interface. If the route lookup returns any other resultant interface (i.e., a media interface), then the SBC performs a second query based on the source IP of the packet to determine which egress interface to use. When source-based routing is used, the default gateway (under the system-config) must exist on a front media interface. If the default-gateway is configured to be the gateway associated with wancom0, SBR will be disabled. All lookups that have destinations that are not on the local network of a media interface will result in an association with wancom0. Thus, the packet is sent out using wancom0. SBR is required for TCP based signaling and can be manually enabled on the SD as follows:

1. Configure the boot flag 0x80008 in boot-parameters
2. Enable “source-routing” under system-config Both require reboot to take effect.

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