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Basic VPLS Architecture, Full Mesh

Comparison of VPLS and h-VPLS VPLS (Virtual Private LAN Service) and h-VPLS (Hierarhical VPLS) has some common and different properties. So they have different aadvantages and disadvantages.In this article, we will focus on the comparison of these two concepts. The most important different between VPLS and h-VPLS is in the interface between the CE (Customer […]

network redundancy, protocols for redundancy

Network Redundancy Protocols Redundancy is a common point for today’s topologies. Especially in mission-critical networks it is not acceptible that using only one gateway to reach a point. Because one gateway means single point of failure. With multiple gateways, you can still reach the remote node even if the gateway that you connect fails. As […]

BGP Administrative Distance As you know routing protocols have Administrative Distance values for preferability.And different vendors have different AD values for the same routing protocols.This is also valid for BGP. Some main vendors and BGP AD(Preference) Values are below: Cisco => 20(eBGP) and 200(iBGP)200 Juniper => 170 Alcatel-Lucent => 170 In Cisco routers two AD […]

bgp (border gataway protocol) ibgp (internal BGP) ebgp (external BGP)

BGP Peers, BGP Sessions and BGP Messages What is BGP peer? To use BGP, the neighbourship between the BGP routers must be established. You can use the statement BGP neighbour or BGP peer for this establishment. There are two types of BGP peer. These are iBGP(interior BGP) peer and eBGP(exterior BGP) peer. iBGP peer is […]

bgp autonomous systems internet

BGP (Border Gateway Protocol) AS you know there are two types of routing protocols in general. These are IGP(Interor Gateway Protocols) and EGP(Exterior Gateway Protocols). In the previous posts we have talked about some of IGP protocols. In this post, we will talk on EGP. EGP is the abbreviation of Exterior Gateway Protocol. In the […]


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