Sify’s Wireless Local Loop for MPLS Layer 3 IP VPN

Sify’s wireless local loop works the following way

• All customer locations will connect to Sify’s nearest PoP through the identified base station
• SU will be connected to the customer end router on an Ethernet interface
• The CPE router or switch should support 802.1Q VLan tagging
• The CPE router or switch marks the VLAN tag to the packets originating from the customer LAN
• Each customer has a dedicated VLAN from the CPE to the MPLS PE router ensuring high security to the packets originating from the customer premise
• The Ethernet packets are transmitted via a transparent, symmetrical bandwidth between the customer premise and Sify’s MPLS PE router

Following are the highlights of using Sify’s Wireless local loop for Layer 3 MPLS IP VPN

• SLA driven wireless local loop access for Layer 3 MPLS IP VPN
• The AP’s installed at base stations are dedicated for MPLS Layer 3 IP VPN
• As the transport of packets between CPE and MPLS router is based on Layer 2 frames, the AP and base stations have no customer route information
• To ensure high security on the wireless local loop, there is dedicated VLAN or PVC over the TDM or Ethernet backhaul
• Support for all three Class of Service (Diamond, Gold and Bronze) is extended
• End to End commitment on Availability, Packet Loss, Jitter and Latency.

Note

• On locations where in the RF interference is minimal, based on feasibility Sify’s wireless local loop can operate in the unlicensed 2.4 GHz band
• RTP, CRTP Compression and LFI is not supported on the Wireless Local Loop

Q. Why is Sify building new wireless Infrastructure for MPLS Layer 3 IP-VPN service?

A. To provide Layer 3 MPLS IP VPN services to our customers on the wireless infrastructure, the traffic originating from the customer premise has to be distinguished, aggregated and mapped to the VRF table created for a specific customer. Hence the AP’s that are dedicated for MPLS Layer 3 IP-VPN are deployed as a Layer 2 Ethernet bridge that would provision a “Virtual Point to Point” link from the customer premise to the MPLS PE router

Note

With Sify’s existing wireless infrastructure, customer traffic cannot be aggregated and distinguished as the AP’s deployed to do IP routing

Diagram depicts a typical connectivity solution for Layer 3 MPLS IP VPN customers on Sify’s Wireless local loop.