Product specifications

Dialogic® BorderNet™ 4000 SBC Product Description Document
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8021.Q VLAN (Virtual Local Area Network) Support
On the BorderNet 4000 SBC, VLANS can be used to separate signaling and media packets
into different logical networks. VLANs can also segregate and route traffic to specific peering
entities. The BorderNet 4000 SBC supports the configuration of up to 1024 8021.Q VLANs
on session links for signaling and media traffic. The following parameters can be configured
for each VLAN:
• Session link
• VLAN ID (1 to 4094)
• Primary IP address subnet mask
• Configured IP addresses
• Default gateway IP address for all traffic from this VLAN
Egress session traffic is tagged with the configured VLAN ID.
When the BorderNet 4000 SBC is deployed in an HA configuration, the IP addresses and
VLANs are configured on the platform pair. In the event of a platform switch-over, the same
VLAN configuration and IP addresses are available on the secondary platform. Switch-overs
are transparent to other nodes on the network.
Multiple IP Addresses Per VLAN
The BorderNet 4000 SBC supports up to 254 IP addresses per VLAN, with a system wide
limit of up to 2048 IP addresses for signaling and media access across all VLANs. Operators
can configure multiple IP addresses per VLAN from the same VLAN subnet on the session
link.
Note: VLANs are optional. Networks that do not require VLANs do not need to configure
VLANS on the session links.
Overlapped IP Address
The BorderNet 4000 SBC supports overlapping private networks with a common IP
addressing scheme. These topologies are frequently seen in the managed service provider
networks. Typically, VLAN tagging is used to clearly distinguish between different
overlapping networks. The BorderNet 4000 SBC’s interface definition and peer binding has
been enhanced to include specifying VLAN tag associated with each overlapped network.
The BorderNet 4000 uses this unique combination of SIP interfaces, peers, and the VLAN
tags to route traffic between various overlapping networks.