Technical Networking Army

  Overview  Virtual Private LAN Service is a Layer 2 VPN technology that lets business sites scattered across the globe appear as if they're connected on the same local Ethernet network. Built over an MPLS or IP backbone, VPLS creates a virtual Ethernet switch across provider edge routers. That lets customer edge devices talk to each other directly over Ethernet frames. Signaling protocols like LDP or BGP help PE routers set up pseudo wires—those are the tunnels that carry Layer 2 frames. The routers also learn MAC addresses dynamically to forward unicast traffic. They flood broadcast and multicast frames as needed. That setup is perfect for enterprises that need seamless Layer 2 connectivity across locations for services like VoIP, video conferencing or legacy systems. But without proper configuration—like split horizon groups—VPLS can run into loops and broadcast storms. That makes precise setup critical to its success. Split Horizon Group A split horizon group is a loop pr...

  Essence: When traffic is above 70% it’s congestion and performance degradation, need to increase capacity. To achieve this adding more links to the existing Link Aggregation Group (LAG) increases bandwidth, distributes traffic better and ensures network stability. This prevents bottlenecks, optimize resource utilization and redundancy, reduces the risk of service disruptions. Expanding LAG allows scaling without downtime, so it’s a must have for handling growing network demands and high traffic environments. Link Aggregation in Capacity Planning  Link Aggregation (LAG) is part of capacity planning by combining multiple physical links into one logical link to increase bandwidth, redundancy and overall network performance. This prevents congestion by distributing traffic across multiple links, ensures optimal resource utilization. In capacity planning LAG allows network engineers to scale bandwidth without additional infrastructure changes, so it’s cost effective. Also, it p...

  VPN: - -            It is called virtual private network. -          It provides establishment of secure private network between 2 end points. In MPLS network basically L2VPN & L3VPN services are used as per routing exchange information between CE & PE routers. L2 VPN: 1.       There is no routing interaction occurs between CE & PE routers. 2.      Epipe , VPWS, VPLS is examples of L2VPN service. Scenario-: company “Purl pay” headquarter at New York location and their multiple branches at Chicago, New Jersey and Houston locations then company wants point-to-point connections between HQ and all sub-branches then VPLS service is used.   & in other case if company wants to communicate only between New York HQ to New Jersey branch office : EPIPE , VPWS, F PIPE , A PIPE type point-to-point service can be configured depending on techn...