Category: Routing Protocols

Types of Address resolution Protocol(ARP)

Topology Address resolution Protocol is used to find the Layer 2( mac address) information when the layer 3(IP) Information is already given. Total 9 filed in Header. The typical Address resolution protocol Header format is shown as below Fig1 ARP_Header Hardware Type: Hardware Type field in the Address Resolution Protocol (ARP) Message specifies the type…

Continue reading

Different Static Route Options

  The IP assignment on interface is shown as above. We will demonstrate the following case study. Case Study 1: Static routes using exit interface Case Study 2:Static routes using IP as next hop Case Study 3:Static routes using exit interface and IP add as next hop Let’s understand how the communication takes place in Ethernet…

Continue reading

BGP Weight Attribute

Topology Objectives Use BGP attribute to influence the route selection in BGP. Currently Router R1/R1 running iBGP .Between R1-R3 & R2-R4 ebgp is used. Within ISP we have used Full iBGP mesh ( of course we could have used RR).Connect the network as shown in topology. Currently R5 learning routes 100.100.100.1/2/3 from both R1 &…

Continue reading

BGP Initialization

Topology Objectives Objective is to understand how bgp initialize when you enable interfaces and bgp parameters. We will check it by sniffing tool Wireshark to know what happening behind the scene.  Wireshark will be enabled on f0/0 on R2. Currently both F0/0 port is shut no ip address, bgp configured on node. Steps: Let’s start…

Continue reading