Router ( cont. )

Links for Cisco Router Command, settings & informations.

1. ccnalab
2. itknowledgeexchange
3. opennet
4. swcp

*Click here to download Cisco Command Doc

Router ( cont. ) - Telnet

Definition

Telnet (teletype network) is a network protocol used on the Internet or local area networks to provide a bidirectional interactive communications facility. Typically, telnet provides access to a command-line interface on a remote host via a virtual terminal connection which consists of an 8-bit byte oriented data connection over the Transmission Control Protocol (TCP). User data is interspersed in-band with TELNET control information. The term telnet may also refer to the software that implements the client part of the protocol. Telnet client applications are available for virtually all computer platforms. Most network equipment and operating system with a TCP/IP stack support a Telnet service for remote configuration (including systems based on Windows NT). Because of security issues with Telnet, its use has waned in favor of SSH for remote access.

For more info, please visit Wikipedia.

**************************************************************

Configure Telnet

To use Telnet, you must 1st set the router.
Click here to see how to set 2 router.

After set all router, now you need to setup for Telnet.

Router>enable
Router#conf t
Router(config)#line vty 0 ? // to check how many lines we have

Router(config)#line vty 0 5
Router(config-line)#
Router(config-line)#password cisco // cisco is the password

Telnet Using Another Router

Router>enable
Router#telnet (ip addr)

Router ( cont. ) - Basic Configure Cisco Router

Using 1 Router

Router>enable
Router#config terminal

********Setup Hostname********
Router(config)#hostname Router_A

********Start Setup Fast Ethernet 0/0 Interface********
Router_A(config)#int fa0/0
Router_A(config-if)#ip addr 192.x.x.x 255.255.255.0
Router_A(config-if)#no shutdown
Router_A(config-if)#exit
Router_A(config)#exit

********Start Setup Fast Ethernet 0/1 Interface********
Router_A(config)#int fa0/1
Router_A(config-if)#ip addr 192.x.x.x 255.255.255.0
Router_A(config-if)#no shutdown
Router_A(config-if)#exit
Router_A(config)#exit

********Start Setup Routing Protocol using RIP********
Router_A(config)#router rip
Router_A(config-router)#network 192.x.x.x
Router_A(config-router)#network 192.x.x.x

*Note : Each IP for the gateway that been setup are not in the same segment.


Using 2 Routers

1st Router

Router>enable
Router#config terminal

********Setup Hostname********
Router(config)#hostname Router_A

********Start Setup Serial 0/0 Interface with DCE connection********
Router_A(config)#int s0/0
Router_A(config-if)#ip addr 10.x.x.x 255.255.255.0
Router_A(config-if)#clockrate 64000
Router_A(config-if)#no shutdown
Router_A(config-if)#exit
Router_A(config)#exit

********Start Setup Fast Ethernet 0/0 Interface********
Router_A(config)#int fa0/0
Router_A(config-if)#ip addr 192.x.x.x 255.255.255.0
Router_A(config-if)#no shutdown
Router_A(config-if)#exit
Router_A(config)#exit

********Start Setup Routing Protocol using RIP********
Router_A(config)#router rip
Router_A(config-router)#network 192.x.x.x
Router_A(config-router)#network 192.x.x.x

-------------------------------------------------------------------------------------------------------
2nd Router

Router>enable
Router#config terminal

********Setup Hostname********
Router(config)#hostname Router_B

********Start Setup Serial 0/1 Interface with DCE connection********
Router_B(config)#int s0/1
Router_B(config-if)#ip addr 10.x.x.x 255.255.255.0
Router_B(config-if)#clockrate 64000
Router_B(config-if)#no shutdown
Router_B(config-if)#exit
Router_B(config)#exit

********Start Setup Fast Ethernet 0/0 Interface********
Router_B(config)#int fa0/0
Router_B(config-if)#ip addr 192.x.x.x 255.255.255.0
Router_B(config-if)#no shutdown
Router_B(config-if)#exit
Router_B(config)#exit

********Start Setup Routing Protocol using RIP********
Router_B(config)#router rip
Router_B(config-router)#network 192.x.x.x
Router_B(config-router)#network 192.x.x.x

*Note : Each IP for the gateway that been setup are not in the same segment.
*Both router can't use the same serial interface.
*Router rip is a basic protocol to connect 2 router with different segmentation/ip.

Router ( cont. ) - Routing Protocols

Border Gateway Protocol ( BGP )

The core routing protocol of the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems. It is described as a path vector protocol. BGP was created to replace the EGP routing protocol to allow fully decentralized routing in order to allow the removal of the NSFNet Internet backbone network. This allowed the Internet to become a truly decentralized system. etc

Cicco Discovery Protocol ( CDP )

A proprietary layer 2 network protocol developed by Cisco Systems that runs on most Cisco equipment and is used to share information about other directly connected Cisco equipment such as the operating system version and IP address. CDP can also be used for On-Demand Routing (ODR), which is a method of including routing information in CDP announcements so that dynamic routing protocols do not need to be used in simple networks. etc

Connectionless Network Service ( CLNS )

It is an OSI Network Layer service that (unlike CONS) does not require a circuit to be established before data is transmitted. CLNS routes messages to their destinations In an OSI protocol deployment, CLNS would be the service provided by CLNP (Connectionless Network Protocol) and used by TP4 (Transport Protocol Class 4). However CLNP is not used on the Internet, instead its function is provided by IP. etc

Hot Standby Router Protocol ( HSRP )

a Cisco proprietary redundancy protocol for establishing a fault-tolerant default gateway. The Virtual Router Redundancy Protocol (VRRP) is a standards-based alternative to HSRP. The two technologies are similar in concept, but not compatible. The protocol establishes a framework between network routers in order to achieve default gateway failover if the primary gateway should become inaccessible, in close association with a rapid-converging routing protocol like EIGRP or OSPF. etc

* Note :- There are many more other protocols that had note stated here. You can search it through search engine exist today.

Router

Definition

A router is a networking device whose software and hardware are usually tailored to the tasks of routing and forwarding information. Routers connect two or more logical subnets, which do not necessarily map one-to-one to the physical interfaces of the router.

Routing is the process of selecting paths in a network along which to send network traffic. Routing is performed for many kinds of networks, including the telephone network, electronic data networks (such as the Internet), and transportation networks. This article is concerned primarily with routing in electronic data networks using packet switching technology.

Routing Protocol

A formula used by routers to determine the appropriate path onto which data should be forwarded. The routing protocol also specifies how routers report changes and share information with the other routers in the network that they can reach. A routing protocol allows the network to dynamically adjust to changing conditions, otherwise all routing decisions have to be predetermined and remain static.


Examples of protocols existed :-

• BGP (Border Gateway Protocol)
• CDP (Cisco Discovery Protocol)
• CLNS (Connectionless Network Service)
• HSRP (Hot Standby Router Protocol)
• IGRP/EIGRP (Enhanced Interior Gateway Routing Protocol)
• IP (Internet Protocol)
• IS-IS (Intermediate System-to-Intermediate System)
• MPLS (Multiprotocol Label Switching)
• Multicast
• NAT (Network Address Translation)
• OSPF (Open Shortest Path First)
• QoS (Quality of Service)
• RIP (Routing Information Protocol)