#default routing

[networkwalks]

Static and Default Routing

Static and Default Routing

Static and Default Routing are two types of routing in which the path selection is controlled manually by a network administrator. STATIC ROUTING “It is a type of fixed routing in which path selection and routing is controlled manually by a network admin”. Static routes have Admin Distance (AD) of 1. Path selection  and routing is manually controlled by a network administrator in static routing.…

View On WordPress

[networkeducative]

Default Route | Default Routing

Default Routing

Default routing is the routing in which we use the default route and the default route is "when we don't know about the destination prefix and destination prefix subnet mask " so  in that case we use the default routing and forward the user data to the next router that is also known as the forwarding router and the address of that router is forwarding router address. Here below is the topology for understanding the concept of default routing for the accessing of the destination network.

Fig 2: Topology for Understanding Default Routing

In Fig 2: Topology for Understanding Default Routing we have two routers R1 and R2. Both are in same network R1 has 1.1.1.1 ip address and R2 has 1.1.1.2 ip address. So the main point is communicate the two Local Area Networks by the default route means PC1 that is in 192.168.1.0 network should have to communicate with PC2 is in the 192.168.2.0 network.

For the communication between 192.168.1.100 and 192.168.2.100 first we add the default route on R1 for the 192.168.2.0 network and then add the default route on R2 for the 192.168.1.0 network:

R1(config)#ip route 0.0.0.0 0.0.0.0 1.1.1.2

The command to add the Default route is "ip route 0.0.0.0 0.0.0.0 1.1.1.2".

"ip route" is the keyword to add  route.

0.0.0.0 is the network which is known as the prefix network that is the destination network that is unknown that why it is 0.0.0.0

0.0.0.0 is subnet mask of the prefix network that is unknown so that why it is 0.0.0.0

1.1.1.2 is the forwarding router's address and we can use outbound of our router and that command will be "ip route 0.0.0.0 0.0.0.0 s0/0".

s0/0 is the outbound interface which is use to propagate the traffic by the specific interface that you define.

R2(config)#ip route 0.0.0.0 0.0.0.0 1.1.1.1

The command to add the Default route is "ip route 0.0.0.0 0.0.0.0 1.1.1.1".

"ip route" is the keyword to add  route.

0.0.0.0 is the network which is known as the prefix network that is the destination network that is unknown that why it is 0.0.0.0

0.0.0.0 is subnet mask of the prefix network that is unknown so that why it is 0.0.0.0

1.1.1.1 is the forwarding router's address and we can use outbound of our router and that command will be "ip route 0.0.0.0 0.0.0.0 s0/0".

s0/0 is the outbound interface which is use to propagate the traffic by the specific interface that you define.

That routing is known as the Default Routing and default routing is used when you don't know the destination and  you only have to forward the user's data to other router.

[n4networking]

Static Vs Default routing , 2 way of static routing , configurations, where to use , Lab example.

#Staticrouting #defaultRouting #PNETLabStatic Vs Default routing , there are mainly two type of static routing , how to configure , where to use , clear your concept in practical way . no more confusion , after watching this your concept will be clear and you will know how to use static and default routing and where to use , how to configure it . install & Configure PNETLab - https://youtu.be/9bci8fxpXScpull/Download IOS/IOL/Image - https://youtu.be/nKJsGjzpOck Lab setup : 0:18 to 15:45Static routing Type-1 : 15:46 -29:25Static Routing type -2 : 29:26 -29.30 default routing : 29:31 - end

[learn-networking]

Difference between Static, Dynamic and Default Routing

Static Routing:

A static routing occurs when you manually add routes in each Router’s Routing table, Routing table should create, maintain, and update by a network administrator, manually. A static route to every network must be configured on every router for full connectivity. This provides a granular level of control over routing, but quickly becomes impractical on large networks. Routers will not share static routes with each other, thus reducing CPU/RAM overhead and saving bandwidth. However, static routing is not fault-tolerant, as any change to the routing infrastructure (such as a link going down, or a new network added) requires manual intervention. Routers operating in a purely static environment cannot seamlessly choose a better Route if a link becomes unavailable. Static routes have an Administrative Distance (AD) of 1, and thus are always preferred over dynamic routes, unless the default AD is changed. A static route with an adjusted AD is called a floating static route. Command Syntax for Static Routing on Cisco Router

The syntax for the global configuration command used to enter a static route is:

ip route {destination prefix} {destination prefix mask} {Exit interface OR Next hop IP address} {Administrative Distance} {Permanent}

The following briefly outlines the advantages and disadvantages of static routing:

Advantages of Static Routing:

1. Minimal CPU/Memory overhead

2. There is no bandwidth update between Routers, which means you will save bandwidth on WAN links.

3. It adds security because the administrator can choose Routing access to certain networks only.

Disadvantages of Static Routing:

1. If any Infrastructure changes must be manually adjust the configuration in complete network.

2. No “dynamic” fault tolerance if a link goes down

3. Administrator must understand the complete internetwork and how each Router connected to configure properly.

4. Impractical on large network

Dynamic Routing:

A Dynamic Routing is when protocols are used to find networks and update Routing tables on Routers. A dynamic routing table is created, maintained, and updated by a routing protocol running on the router. Examples of routing protocols include RIP (Routing Information Protocol), EIGRP (Enhanced Interior Gateway Routing Protocol), and OSPF (Open Shortest Path First). Routers do share dynamic routing information with each other, which increases CPU, RAM, and bandwidth usage. However, routing protocols are capable of dynamically choosing a different (or better) path when there is a change to the routing infrastructure.

Difference between Routing Protocols and Routed Protocols

Do not confuse routing protocols with routed protocols:

A routed protocol is a Layer 3 protocol that applies logical addresses to devices and routes data between networks (such as IP)

A routing protocol dynamically builds the network, topology, and next hop information in routing tables (such as RIP, EIGRP, etc.)

The following briefly outlines the advantages and disadvantages of dynamic routing:

Advantages of Dynamic Routing:

1. Simpler to configure on larger networks

2. Will dynamically choose a different (or better) route if a link goes down

3. Ability to load balance between multiple links

Disadvantages of Dynamic Routing:

1. Updates are shared between routers, thus consuming bandwidth

2. Routing protocols put additional load on router CPU/RAM

3. The choice of the “best route” is in the hands of the routing protocol, and not the network administrator.

Default Routing:

A default routing is used only when one exit path from the Router. Default Routing can configure like a static route with the ip route command, but use 0.0.0.0 0.0.0.0 for the IP network and subnet mask followed by the next hop router’s IP address or Exit interface of the local Router. Have to also use the ip classless command since there aren’t any routes in the routing table. ip classless is enabled by default in IOS version 12. Command Syntax for Default Routing on Cisco Router

Router(config)# ip route 0.0.0.0 0.0.0.0 192.168.1.2

Router(config)# ip classless