VLANs

VLANs are used to logically separate a single phy-interface into multiple network interfaces. There are several applications for this like MPLS VPNs (RFC 2547), MPLS LSPs, L2VPNs (IPSec, L2TP, ATM PVCs), reusing address space, segmenting traffic, and maximizing the bandwidth into a switch or router. The range of services and management capabilities you can implement with VPNs is huge.

The primary applications of VLANs on the Oracle Communications Session Border Controller are VPNs and peering. Several peering partners may terminate their connections to a Oracle Communications Session Border Controller on a single phy-interface. VLAN tags are used to segregate and correctly route the terminated traffic. The Oracle Communications Session Border Controller can support a maximum of 1024 VLANs per phy-interface. Ingress packets that do not contain the correct VLAN tag will be dropped. All packets exiting on an egress interface will have the VLAN tag appended to them.

The Oracle Communications Session Border Controller can be included in an MPLS network through its connectivity to a PE router, which maps a MPLS VPN label to an 802.1q VLAN tag. Each Oracle Communications Session Border Controller can terminate different 802.1q VLANs into separate network interfaces, each of which can represent a different customer VPN.