Routing

Routing

About VRF (Virtual Routing and Forwarding)

About VRF VRF stands for Virtual Routing and Fowarding, create a virtual router within the physical router (or L3 switc...
Routing

Policy-Based-Routing and IPROUTE2

PBR (Policy-Based Routing) I wrote before when the router executes routing, only destination IP address is considered. ...
Routing

Broadcast routing

There are two types of IP broadcast. One is Limited Broadcast, the other is Directed Broadcast. Limited Broadcast ...
Routing

Cause and avoidance design of routing loop

The routing loop is said the state that IP packets pass through the router two or more times until the TTL is exhausted....
Routing

Rule of routing #5 Recursive Routing

NextHop address of the routing is basically to specify from among the segment of its Connected route.However, there ...
Routing

Rule of routing #4 Administrative Distance (AD)

About Administrative Distance (AD) Administrative-Distance (hereinafter AD) is the value that determines a preference w...
Routing

Rule of routing #3 Longest Match

Consider the network such as the following. On the back side of the Router4, there are the NW adresses of 10....
Routing

Rule of routing #2 Packet Discarding

(In Layer 3, ) the cases that incomming packet is discarded are following. 1. There is no route in the routing table I...
Routing

Rule of routing #1 Header rewriting

There was no particular change in the Ethernet header and the IP header at the time of the switching of Layer 2, but...
Routing

Routing table

In the memory of the NW devices of Layer 3 (router or L3 switch), there is a space to store the routing information call...
Routing

Configuring Routing

Although switching can learn the MAC address table automatically, routing is basically to consider the network configura...
Routing

Routing Overview

The Layer 2 defines communication directly or between connected devices across a Layer 2 device (L2 switch), but when yo...
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