CCNA

1. Cisco Network Support Certifications 2. Networking Terms 3. INTRODUCTION TO NETWORKING 4. TYPES OF NETWORK 5. The Development of the Internet 6. NETWORK ARCHITECTURE 7. TOPOLOGY 8. BUS TOPOLOGY 9. RING TOPOLOGY 10. STAR TOPOLOGY 11. MESH TOPOLOGY 12. HYBRID TOPOLOGY 13. Speed of Networking device 14. NETWORK DEVICES 15. Exploring Wireless Network 16. REPEATERS 17. HUB 18. SWITCH 19. BRIDGE 20. ROUTERS 21. TRANSMISSION Telecommunication 22. Difference between Full Duplex, Half Duplex and Simplex 23. IP-ADDRESSING and IPV4 24. IPv4 address classes 25. IPV6 [ Internet Protocol Version 6 ] 26. SPEED OF VARIOUS DEVICES 27. Network Security 28. Some basic suggestion and steps to prevent Attacks and Network security 29. OSI model 30. UPPER and LOWER Layer 31. Application Layer (Layer 7) 32. Presentation Layer (Layer 6) 33. Session Layer (Layer 5) 34. Transport Layer (Layer 4) 35. Network Layer (Layer 3) 36. Data Link Layer 2 37. Physical Layer 1 38. TCP/IP The DoD Model 39. ROUTED PROTOCOL 40. Ports and Application 41. Important Application, Protocol and Port Number 42. Router Function 43. Types of Routing Protocols 44. STARTING ROUTER 45. CISCO IOS 46. Logging in to the Router 47. CISCO Router IOS commands List 48. Setting time and date of router 49. Router configuration commands 50. Optimizing Switch and Router 51. Understanding Router Terms 52. ROUTER SECURITY 53. Configuring CISCO SWITCH Security Policy 54. IMPLEMENTING STATIC ROUTING 55. UNDERSTANDING THE NEED FOR NAT 56. WAN Connections 57. Access List [ACL] 58. VLAN [Virtual Local Area Network] 59. SPANNING TREE :- BROADCAST STORM 60. Lab 1 Setting up a Serial Interface 61. Lab 2 : IP Addressing 62. Lab 3 Static Routes 63. Lab 4 Default Routes 64. Lab 5 RIP Routes 65. Lab 6 IGRP Routes 66. Lab 7 EIGRP Routes 67. Lab 8 OSPF Routes 68. Lab 9 CHAP and RIP 69. Lab 10 Standard Access-Lists with RIP 70. Lab 11 Extended Access-Lists with RIP 71. Lab 12 Static NAT 72. Lab 13 Many to One NAT 73. Lab 14 NAT Pool 74. Lab 15 ( 2950 Trunk ) 75. Lab 16 ( 2950 Trunk Dynamic ) 76. Lab 17 (2950 VLANs) 77. Lab 18 ( 2950 Deleting VLANs ) 78. Lab 19 ( 2950 VTP ) 79. Lab 20 ( 2950 VTP w/ client ) 80. Lab 21 ( 2950 Telnet )
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Optimizing Switch and Router tutorials

 

No breakup while typing command

  • Sometimes while working with switches and router, when we want to type “show ip interfaces”, it breaks the messages and display some other messages in between. It split up typing. Though it works with commands typed in different lines but it causes problem. To fix it do as follow

 

Switch# config terminal

Switch(config)# line con 0

Switch(config-line)# logging synchronous

Switch(config-line)# exit

 

Switch(config)# line vty 0 4 (for Telnet)

Switch(config-line)# logging synchronous

Switch(config-line)# exit

 

Lock router

  • When you don’t do anything for 5 minutes, it will close current command session. This is good in way that if you leave your desk for some work, other person could not configure anything. But if you are sure that only you are going to work on your switch or router, you can increase or decrease execution timeout.

 

Switch# config terminal

Switch(config)# line con 0

Switch(config-line)# exec-timeout ?

<0 :- 35791> timeout in minutes ?

Switch(config-line)# exec-timeout 30 0 (30 min 0 sec)

Switch(config-line)# no exec-timeout

(Dangerous no time out, if You leave place anyone can change config)

Switch(config-line)# exit

 

Switch(config)# line vty 0 4 (for telnet)

Switch(config-line)# exec-timeout 30 0 (30 min 0 sec)

Switch(config-line)# exit

 

No domain lookup

  • When we type some mistake, let’s say instead of “show” we type “flow”, on switch or router, it will take 30 to 60 seconds to get command prompt back. It broadcast it to 255.255.255.255 to resolve IP Address problem. It may happen that some time some one will respond it with some IP address.

  • Here after any ambiguous command will not broadcast to 255.255.255.255

 

Switch# flow

Translating “flow” ….. domain server (255.255.255.255)

%unknown command, computer name, or unable to find computer address

Switch# config terminal

Switch(config)# no ip domain-lookup

Switch(condif)# exit

Store command in shortcut key

  • When we type command again and again, we can create shortcuts as follow for e.g. in “S”

 

Switch# show ip interface brief [regular way]

Switch# config terminal

Switch(config)# alias exec

Switch(config)# alias exec S show ip interface brief

Switch(config)# exit

 

Description of interface

  • Change description of interface. When we apply “show interface serial 0” and so on, we don’t know what type of interface it is and where it is connect. We can use “description”

Router# config terminal

Router(config)# interface serial 0

Router(config)# description Mumbai to Delhi :- Serial T1 line

Router(config)# exit

Router# show interfaces

 


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