TCP Header

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+    |          Source Port          |       Destination Port        |    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+    |                        Sequence Number                        |    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+    |                    Acknowledgment Number                     

BGP Route-Reflector Design

A route learned by one ibgp peer won’t be advertised to another ibgp peer. This is called BGP split horizon rule. This rule is used to avoid loop in ibgp cases. To mitigate this, we have following option by which one ibgp learned routes can be advertised to another ibgp peer. BGP full mesh BGP

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

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