Comman Network Device Symbols and Description

Posted by : Unknown Monday, May 27, 2013

In this course(CCNA), many networking devices will be discussed. Networking is a very graphically oriented subject, and icons are commonly used to represent networking devices. On the left side of the diagram are shown some common devices which often originate messages that comprise our communication. These include various types of computers (a PC and laptop icon are shown), servers, and IP phones. On local area networks these devices are typically connected by LAN media (wired or wireless).
The below figure shows some of the most common intermediate devices, used to direct and manage messages across the network, as well as other common networking symbols. Generic symbols are shown for:
 
Desktop Computers- A comman computer used in a home or office
Laptop- A Portable computer
IP Phone- A digital telephone that carries voice as data networks instead of analog phone lines.
Switch - the most common device for interconnecting local area networks
Firewall -provides security to networks
Router - helps direct messages as they travel across a network
Wireless Router - a specific type of router often found in home networks
Cloud - used to summarize a group of networking devices, the details of which may be unimportant to the discussion at hand
Serial Link - one form of WAN interconnection, represented by the lightning bolt-shaped line
WAN Media- One form of wide- area network(WAN) interconnection, reprenented by the lightning bolt-shaped line
Wireless Media- Depicts local-area network wireless access.
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  1.  You can combine 2-8 ports into a single link.
     All links in the channel group are used for communication between the switches.
     Use EtherChannel to increase the bandwidth between switches.
     Use EtherChannel to establish automatic-redundant paths between switches. If one link
    fails, communication will still occur over the other links in the group.
     Use EtherChannel to reduce spanning tree convergence times.
    se the channel-group command for a port to enable EtherChannel as follows:

    Switch(config)#interface fast 0/12
    Switch(config-if)#channel-group 1 mode on

    ach channel group has its own number. All ports assigned to the same channel group will be
    ewed as a single logical link.
    ote: If you do not use the channel-group command, the spanning tree algorithm will identify
    ch link as a redundant path to the other bridge and will put one of the ports in blocking state.


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  2. CCNA Certification




    What is the CCNA Certification?

    The CCNA certification (Cisco Certified Network Associate) is a very popular Cisco networking certification aimed at intermediate network technicians. As the next step up from Cisco's foundation-level network offering, the CCENT certification, CCNA candidates should be able to successfully carry out any number of essential networking maintenance and troubleshooting duties such as installing, configuring and operating LAN, WAN and dial access services for small networks. Additionally, good working knowledge of topics such as IP, EIGRP, Frame Relay, VLAN’s, Ethernet and Access Control Lists is required, just to name a few.

    While the core CCNA credential focuses on Routing and Switching, the CCNA qualification can be further extended for candidates who wish to specialise in certain areas of technology i.e:

    CCNA Security
    CCNA Sp Operations
    CCNA Voice
    CCNA Wireless




    Who is the CCNA certification for?

    The CCNA certification is aimed toward those with at least intermediate networking experience and knowledge. Candidates with little or no prior experience should perhaps consider an entry-level networking certification (such as Cisco's own CCENT certification or CompTIA’s Network+) as a stepping stone to the CCNA certification.


    Are there any prerequisites before I attempt the CCNA?

    While there are no pre-requisites for the CCNA certification, it should not be considered an entry-level networking certification. The CCNA itself is a prerequisite to more advanced Cisco certifications, such as the CCNP, CCSP and the CCIE, as well as the specialist versions of the CCNA.


    How do I earn the CCNA certification?

    There are two ways to earn the CCNA certification - pass two individual exams or pass one larger, combined (composite) exam. The exam options are (click the respective links to be taken to the applicable Cisco web page):

    Composite exam:

    640-802 CCNA - 90 minutes, 45-55 questions

    Or, individual exams:

    640-822 ICND1 - 90 minutes, 40-50 questions
    640-816 ICND2 - 75-90 minutes, 40-50 questions


    Specialty versions of the CCNA, such as CCNA Security require the passing of one additional exam.

    Although the candidate will be tested on the same subjects irrespective of which exam route they take, the two different options offer candidates a degree of flexibility in the manner in which they choose to study for the CCNA certification. By taking the two exam route, candidates can break the CCNA into more manageable chunks and take the respective exam when they feel ready. Additionally, the two-exam approach gives the candidate the opportunity to ease into the certification by taking the 640-822 ICND1 exam first (which is not as advanced in subject detail as the 640-816 ICND2 exam). Alternatively, by taking the 640-802 CCNA combined exam, candidates can attempt to gain the entire CCNA certification credential in one fell swoop and save money by paying just one exam fee instead of two.

    Candidates who choose the two-exam route have three years to finish both exams in order to become CCNA qualified.


    What is the passing score for the CCNA exams?

    The number of questions and the number of scoring points per question differs from exam to exam. The required passing score and the number of questions you will receive for your particular exam will be displayed at the start of your exam. After you have completed your exam you will receive a personalised score report with a breakdown of section scores to help you identify areas of weakness.

    Candidates who successfully pass the 640-802 CCNA exam will immediately gain the CCNA certified credential, while candidates who opt for the two-exam route must pass both exams before being awarded their credential. It is important that you keep your score report safe as you will need this with any future correspondence with Cisco concerning your qualification.


    What do the CCNA exams cost?

    Cisco offer a brief summary of the cost of their exams on this page, however it is advised that you contact your nearest Cisco testing facility to get the current cost of your exam.


    What are the CCNA recertification requirements?

    The CCNA certification itself is valid for three years after which time recertification is required to remain certified. To recertify, a candidate has a number of options available, particularly if they are going for more advanced Cisco certifications. A full list of the recertification options can be found on this page.


    Where can I take the CCNA exam?

    Cisco exams are proctored by Pearson VUE. You will need to register with them before you can take a CCNA exam. You can find more information about them here.




  3. Ipv6-static-routing
    R1
    Press RETURN to get started!

    Router>en
    Router#
    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
    Router(config)#int loopback 1
    %LINK-5-CHANGED: Interface Loopback1, changed state to up
    %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
    Router(config-if)#ipv6 address 1010::1/126
    Router(config-if)#no shutdown
    Router(config-if)#exit
    Router(config)#int f0/0
    Router(config-if)#ipv6 address 2000::1/126
    Router(config-if)#speed auto
    Router(config-if)#duplex auto
    Router(config-if)#no shutdown
    %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
    Router(config-if)#exit
    Router Router(config)#ipv6 route 2001::/126 2000::2
     (config)#ipv6 route 2020::1/128 2000::2
    Router(config)#ipv6 route 3030::1/128 2000::2
    Router#ping 2001::2
    Router(config)#do wr mem
    Building configuration...
    R2
    Router>en
    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Router(config)#ipv6 unicast-routing
    Router(config)#int loopback 2
    %LINK-5-CHANGED: Interface Loopback2, changed state to up
    Router(config-if)#ipv6 add 2020::1/128
    Router(config-if)#no shutdown
    Router(config-if)#exit
    Router(config)# int  f0/0
    Router(config-if)#ipv6 address 2000::2/126
    Router(config-if)#speed auto
    Router(config-if)#duplex auto
    Router(config-if)#no shut
    %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
    Router(config-if)#int f0/1
    Router(config-if)#ipv6 address 2001::1/126
    Router(config-if)#speed auto
    Router(config-if)#duplex auto
    Router(config-if)#no shutdown
    %LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
    Router(config-if)#exit
    Router(config)#ipv6 route 1010::1/128 2000::1
    Router(config)#ipv6 route 3030::1/128 2001::2
    Router(config)#do wr mem
    Building configuration...
    R3
    Router>enable
    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Router(config)#ipv6 unicast-routing
    Router(config)#int loopback 3
    %LINK-5-CHANGED: Interface Loopback3, changed state to up
    Router(config-if)#ipv6 address 3030::1/128
    Router(config-if)#no shut
    Router(config-if)#exit
    Router(config)#int f0/0
    Router(config-if)#ipv6 address 2001::2/126
    Router(config-if)#no shut
    %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
    Routerconfig-if)#exit
    Router(config)#ipv6 route 1010::1/128 2001::1
    Router(config)#ipv6 route 2000::1/126 2001::1
    Router(config)#ipv6 route 2020::1/126 2001::1
    Router(config)#do wr mem
    Building configuration...
    [OK]
    Router(config)#do ping 2001::2
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 2001::2, timeout is 2 seconds:
    !!!!!
    Success rate is 100 percent (5/5), round-trip min/avg/max = 1/3/4 ms




  4. -
    EXTENDED-ACCESS-LIST 110 PC2 NOT PING PC0 BUT
    PC1 PING PC0
    ROUTER-0

    -- System Configuration Dialog ---

    Continue with configuration dialog? [yes/no]: no
    Press RETURN to get started!
    Router>ena
    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
    Router(config)#int f0/0
    Router(config-if)#ip add 192.168.0.1 255.255.255.0
    Router(config-if)#no shut

    %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

    Router(config-if)#exit
    Router(config)#int s1/0
    Router(config-if)#ip add 10.0.0.1 255.0.0.0
    Router(config-if)#clock rate 64000
    Router(config-if)#no shut

    %LINK-5-CHANGED: Interface Serial1/0, changed state to down
    Router(config-if)#exit
    Router(config)#rou
    Router(config)#router rip
    Router(config-router)#ver 2
    Router(config-router)#net
    Router(config-router)#network 10.0.0.0
    Router(config-router)#network 192.168.0.0
    Router(config-router)#exit
    Router(config)#exit

    Router#copy running-config startup-config
    Destination filename [startup-config]?
    Building configuration...
    [OK]
    Router#
    %LINK-5-CHANGED: Interface Serial1/0, changed state to up

    %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up

    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
      Router(config)#access-list 110 permit ip host 192.168.0.2 host 192.168.1.2
    Router(config)#access-list 110 den ip host 192.168.0.2 host 192.168.1.3
    Router(config)#int f0/0
    Router(config-if)#ip access-group 110 in
    Router(config-if)#exit
    Router(config)#exit
    Router#
    Router#copy running-config startup-config
    Destination filename [startup-config]?
    Building configuration...
    [OK]

    ROUTER-1

    --- System Configuration Dialog ---

    Continue with configuration dialog? [yes/no]: no

    Press RETURN to get started!

    Router>en
    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
    Router(config)#int f0/0
    Router(config-if)#ip add 192.168.1.1 255.255.255.0
    Router(config-if)#no shut

    %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

    Router(config-if)#exit
    Router(config)#int s1/0
    Router(config-if)#ip add 10.0.0.2 255.0.0.0
    Router(config-if)#clock rate 64000
    Router(config-if)#no shut

    Router(config-if)#exit
    Router(config)#router rip
    Router(config-router)#ver 2
    Router(config-router)#network 10.0.0.0
    Router(config-router)#network 192.168.1.0
    Router(config-router)#exit
    Router(config)#exit
    Router#
    %SYS-5-CONFIG_I: Configured from console by console

    Router#copy running-config startup-config
    Destination filename [startup-config]?
    Building configuration...
    [OK]
    Router#

  5. टेलनेट कॉन्फिग रौटर 1 एक्सेस ओनली रौटर 2 
    ACL-TELNET-BLOCK
    ROUTER-R0
             --- System Configuration Dialog ---
    Continue with configuration dialog? [yes/no]: no
    Press RETURN to get started!
    Router>enable
    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Router(config)#int f0/0
    Router(config-if)#ip add 192.168.0.1 255.255.255.0
    Router(config-if)#no shutdown
    %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
    Router(config-if)#exit
    Router(config)#int s1/0
    Router(config-if)#ip address 10.0.0.1 255.0.0.0
    Router(config-if)#clock rate 64000
    Router(config-if)#no shut
    %LINK-5-CHANGED: Interface Serial1/0, changed state to down
    Router(config)#router rip
    Router(config-router)#version 2
    Router(config-router)#network 10.0.0.0
    Router(config-router)#network 192.168.0.0
    Router(config-router)#exit
    Router(config)#exit
    %SYS-5-CONFIG_I: Configured from console by console
    Router#copy running-config startup-config
    Destination filename [startup-config]?
    Building configuration...
    [OK]
    Router#
    ROUTER-R1
    Continue with configuration dialog? [yes/no]: no
    Press RETURN to get started!
    Router>ena
    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Router(config)#int f0/0
    Router(config-if)#ip add 192.168.1.1 255.255.255.0
    Router(config-if)#no shut
    Router(config)# exit
    Router(config)#int s1/0
    Router(config-if)#ip add 10.0.0.2 255.0.0.0
    Router(config-if)#clock rate 64000
    Router(config-if)#no shut
    %LINK-5-CHANGED: Interface Serial1/0, changed state to down
    Router(config-if)#exit
    Router(config)#int s1/1
    Router(config-if)#ip add 20.0.0.2 255.0.0.0
    Router(config-if)#clock rate 64000
    Router(config-if)#no shut
    Router(config-if)#EXIT
    Router(config)#router rip
    Router(config-router)#ver 2
    Router(config-router)#network 10.0.0.0
    Router(config-router)#network 192.168.1.0
    Router(config-router)#network 20.0.0.0
    Router(config-router)#exit
    Router(config)#access-list 10 permit 192.168.2.2
    Router(config)#line vty 0 4
    Router(config-line)#password telnet
    Router(config-line)#login
    Router(config-line)#access-class 10  in
    Router(config)#exit
    %SYS-5-CONFIG_I: Configured from console by console
    Router#copy running-config startup-config
    Destination filename [startup-config]?
    Building configuration...
    [OK]
    ROUTER-2
             --- System Configuration Dialog ---
    Continue with configuration dialog? [yes/no]: no
    Press RETURN to get started!
    Router>ena
    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Router(config)#int f0/0
    Router(config-if)#ip add 192.168.2.1 255.255.255.0
    Router(config-if)#no shut
    %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
    Router(config-if)#exit
    Router(config)#int s1/0
    Router(config-if)#ip add 20.0.0.2 255.0.0.0
    Router(config-if)#clock rate 64000
    Router(config-if)#no shut
    Router(config)#exit
    Router(config)#router rip
    Router(config-router)#ver 2
    Router(config-router)#network 192.168.2.0
    Router(config-router)#network 20.0.0.0
    Router#copy running-config startup-config
    Destination filename [startup-config]?
    Building configuration...
    [OK]


  6. बीना रोउटर वलन routeing







    inter-vlan-routing-layer-3-switch-3560
    Switch>enable
    Switch#conf

    Switch(config)hostname Switch
    Switch(config)ip routing

    Switch(config)interface Vlan1
     Switch(config)no ip add
     Switch(config)shutdown
    Switch(config)exit
    Switch(config)#int f0/1
    Switch(config-if)#switchport trunk encapsulation dot1q
    Switch(config-if)#switchport mode trunk
    Switch(config-if)#no shutdown
    Switch(config-if)#exit
    Switch(config)interface Vlan10
     Switch(config)ip address 192.168.1.1 255.255.255.0
    Switch(config)no shut
    Switch(config)exit
    switch(config)#int f0/2
    switch(config-if)#switchport mode access
    switch(config-if)#switchport access vlan 10
    %LINK-5-CHANGED: Interface Vlan10, changed state to up

    %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to up
    % Access VLAN does not exist. Creating vlan 10
    switch(config-if)#no shutdown
    switch(config-if)#exit
    Switch(config)interface Vlan20
     Switch(config)ip address 192.168.2.1 255.255.255.0
    Switch(config)no shut
    Switch(config)exit
    switch(config)#int f0/3
    switch(config-if)#switchport mode access
    switch(config-if)#switchport access vlan 20

    %LINK-5-CHANGED: Interface Vlan20, changed state to up

    %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan20, changed state to up
    % Access VLAN does not exist. Creating vlan 20
    switch(config-if)#no shutdown
    switch(config-if)#exit
    Switch#copy running-config startup-config



  7. VTP





    VTP -SERVER-SWITCH
    Switch>ena
    Switch>enable
    Switch#vlan database
    % Warning: It is recommended to configure VLAN from config mode,
      as VLAN database mode is being deprecated. Please consult user
      documentation for configuring VTP/VLAN in config mode.
    Switch(vlan)#vtp server
    Device mode already VTP SERVER.
    Switch(vlan)#vtp domain hardzone
    Changing VTP domain name from NULL to hardzone
    Switch(vlan)#vtp password ccna
    Setting device VLAN database password to ccna
    Switch(vlan)#vlan 2 name sales
    VLAN 2 added:
        Name: sales
    Switch(vlan)#vlan 3 name mark
    VLAN 3 added:
        Name: mark
    Switch(vlan)#exit
    APPLY completed.
    Exiting....
    Switch#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
    Switch(config)#int f0/2
    Switch(config-if)#switchport mode access
    Switch(config-if)#switchport access vlan 2
    Switch(config-if)#no shutdown
    Switch(config-if)#exit
    Switch(config)#int f0/3
    Switch(config-if)#switchport mode access
    Switch(config-if)#switchport access vlan 3
    Switch(config-if)#no shutdown
    Switch(config-if)#exit
    Switch(config)#int vlan 1
    Switch(config-if)#ip address 192.168.0.1 255.255.255.0
    Switch(config-if)#no shutdown
    %LINK-5-CHANGED: Interface Vlan1, changed state to up
    %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
    Switch(config-if)#exit
    Switch(config)#int f0/1
    Switch(config-if)#switchport mode trunk

    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down

    %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down

    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

    %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up


    Switch(config-if)#switchport trunk allowed vlan all
    Switch(config-if)#no shutdown
    Switch(config-if)#exit
    Switch(config)#exit

    %SYS-5-CONFIG_I: Configured from console by console
    Switch#copy running-config startup-config
    Destination filename [startup-config]?
    Building configuration...
    [OK]
    Switch#


    CLIENT-SWITCH-2950



    Switch>enable
    Switch#vlan database
    % Warning: It is recommended to configure VLAN from config mode,
      as VLAN database mode is being deprecated. Please consult user
      documentation for configuring VTP/VLAN in config mode.

    Switch(vlan)#vtp client
    Setting device to VTP CLIENT mode.
    Switch(vlan)#vtp domain hardzone
    Changing VTP domain name from NULL to hardzone

    Switch(vlan)#vtp password ccna
    Setting device VLAN database password to ccna
    Switch(vlan)#exit
    APPLY completed.
    Exiting....
    Switch#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
    Switch(config)#int f0/2
    Switch(config-if)#switchport access vlan 2
    Switch(config-if)#no shutdown
    Switch(config-if)#exit
    Switch(config)#int f0/3
    Switch(config-if)#switchport access vlan 3
    Switch(config-if)#no shutdown
    Switch(config-if)#exit
    Switch(config)#exit
    Switch#show vtp status
    VTP Version                     : 2
    Configuration Revision          : 0
    Maximum VLANs supported locally : 255
    Number of existing VLANs        : 5
    VTP Operating Mode              : Client
    VTP Domain Name                 : hardzone
    VTP Pruning Mode                : Disabled
    VTP V2 Mode                     : Disabled
    VTP Traps Generation            : Disabled
    MD5 digest                      : 0x9B 0x3E 0xE0 0x0F 0x74 0xB9 0x25 0xF1
    Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00

    Switch#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
    Switch(config)#INT F0/1

    Switch(config-if)#switchport mode trunk
    Switch(config-if)#switchport trunk allowed vlan all
    Switch(config-if)#no shutdown
    Switch(config-if)#exit
    Switch(config)#exit

    Switch#copy running-config startup-config
    Destination filename [startup-config]?
    Building configuration...
    [OK]





  8. इंटर vlan routeing




    ROUTER-CONFIGRATION
             ---

     System Configuration Dialog ---

    Continue with configuration dialog? [yes/no]: no

    Press RETURN to get started!
    Router>enable
    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
    Router(config)#int f0/0
    Router(config-if)#no ip address
    Router(config-if)#no shutdown
    %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
    Router(config-if)#exit
    Router(config)#int f0/0.10
    %LINK-5-CHANGED: Interface FastEthernet0/0.10, changed state to up
    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.10, changed state to up
    Router(config-subif)#encapsulation dot1Q 10
    Router(config-subif)#ip add 192.168.1.1 255.255.255.0
    Router(config-subif)#int f0/0.20
    Router(config-subif)#
    %LINK-5-CHANGED: Interface FastEthernet0/0.20, changed state to up
    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.20, changed state to up
    Router(config-subif)#ip add 192.168.2.1 255.255.255.0
    % Configuring IP routing on a LAN subinterface is only allowed if that
    subinterface is already configured as part of an IEEE 802.10, IEEE 802.1Q,


    switch-layer-2-configration
    Switch>enable
    Switch#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
    Switch(config)#vlan 10
    Switch(config-vlan)#name saa
    Switch(config-vlan)#exit
    Switch(config)#vlan 20
    Switch(config-vlan)#name maer
    Switch(config-vlan)#exit
    Switch(config)#int range f0/2-3
    Switch(config-if-range)#switchport access vlan 10
    Switch(config-if-range)#no shutdown
    Switch(config-if-range)#exit
    Switch(config)#int range f0/4-5
    Switch(config-if-range)#switchport access vlan 20
    Switch(config-if-range)#no shutdown
    Switch(config-if-range)#exit
    Switch(config)#int f0/1
    Switch(config-if)#switchport mode trunk
    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
    Switch(config-if)#no shutdown
    Switch(config-if)#exit
    Switch(config)#exit
    %SYS-5-CONFIG_I: Configured from console by console
    Switch#copy running-config startup-config
    Destination filename [startup-config]?

    एंड आफ्टर पिंग पक

  9. ospf  protocol
     select shortest network path



    ROUTER 2

    Continue with configuration dialog? [yes/no]: no

    Press RETURN to get started!
    Router>ena
    Router>enable
    Router#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
     Router(config)#int s1/0
    Router(config-if)#bandwidth 512
    Router(config-if)#ip add 10.0.0.1 255.0.0.0
    Router(config-if)#no shut
    %LINK-5-CHANGED: Interface Serial1/0, changed state to down
    Router(config-if)#clock rate 9600
    Router(config-if)#exit
    Router(config)#int s1/1
    Router(config-if)#ip add 20.0.0.1 255.0.0.0
    Router(config-if)#no shut
    %LINK-5-CHANGED: Interface Serial1/1, changed state to down
    Router(config-if)#band 256
    Router(config-if)#clock rate 9600
    Router(config-if)#exit
    Router(config)#router ospf 20
    Router(config-router)#network 10.0.0.0 0.255.255.255 area 20
    Router(config-router)#network 20.0.0.0 0.255.255.255 area 20
    Router#copy running-config startup-config
    Destination filename [startup-config]?
    Building configuration...
    [OK]

    0
    ROUTER-3
    Continue with configuration dialog? [yes/no]: no
    Press RETURN to get started!
    Router>enable 
    Router#conf
    Configuring from terminal, memory, or network [terminal]? 
    Enter configuration commands, one per line.  End with CNTL/Z.
    Router(config)#int s1/0
      Router(config-if)#bandwidth 512
    Router(config-if)#ip add 10.0.0.1 255.0.0.0
    Router(config-if)#no shut
    Router(config-if)#clock rate 9600
    %LINK-5-CHANGED: Interface Serial1/0, changed state to down
    Router(config-if)#exit
    Router(config)#int s1/1
    Router(config-if)#ip add 20.0.0.1 255.0.0.0
    Router(config-if)#no shut
    Router(config-if)#clock rate 9600
    %LINK-5-CHANGED: Interface Serial1/1, changed state to down
    Router(config-if)#band 256
    Router(config-if)#exit
    Router(config)#router ospf 20
    Router(config-router)#network 10.0.0.0 0.255.255.255 area 20
    Router(config-router)#network 20.0.0.0 0.255.255.255 area 20
    Router#copy running-config startup-config 
    Destination filename [startup-config]? 
    Building configuration...
    [OK]

  10. स्विच पोर्ट सिक्यूरिटी कमांड्स से हम नेटवर्क को प्रोताक्ट कर सकते है
    यहाँ कमांड्स कॉन्फिग के बाद स्विच पोर्ट पर 1 कंप्यूटर से अधिक कंप्यूटर कोन्नेक्ट होने पर पोर्ट बंद हो जाता है कोई और कंप्यूटर नेटवर्क से नहीं कोन्नेक्ट होगा



    Switch>ena
    Switch>enable
    Switch#conf
    Configuring from terminal, memory, or network [terminal]?
    Enter configuration commands, one per line.  End with CNTL/Z.
    Switch(config-if)#switchport mode access
    Switch(config-if)#switchport port-security
    Switch(config-if)#switchport port-security mac-address aaaa.bbbb.cccc
    Switch(config-if)#switchport port-security violation protect
    Switch(config)#exit
    Switch#show port-security interface f0/2
    Port Security              : Enabled
    Port Status                : Secure-up
    Violation Mode             : Protect
    Aging Time                 : 0 mins
    Aging Type                 : Absolute
    SecureStatic Address Aging : Disabled
    Maximum MAC Addresses      : 1
    Total MAC Addresses        : 1
    Configured MAC Addresses   : 1
    Sticky MAC Addresses       : 0
    Last Source Address:Vlan   : 0000.0000.0000:0
    Security Violation Count   : 0
    Switch#copy running-config startup-config
    Destination filename [startup-config]?
    Building configuration...
    [OK]
    Switch#
  11. nat -translating

    RO-2

    interface FastEthernet0/0
     ip address 30.0.0.1 255.0.0.0
     duplex auto
     speed auto
    !
    interface FastEthernet0/1
     no ip address
     duplex auto
     speed auto
     shutdown
    !
    interface Serial0/1/0
     bandwidth 64
     ip address 20.0.0.1 255.0.0.0
     clock rate 64000
    !
    interface Serial0/1/1
     no ip address
     shutdown
    !
    interface Vlan1
     no ip address
     shutdown
    !
    ip classless
    ip route 50.0.0.0 255.0.0.0 20.0.0.2
    !
    !
    !
    !
    !
    !
    !
    line con 0
    line vty 0 4
     login
    !
    !
    ROU-1

    nterface FastEthernet0/0
     ip address 10.0.0.1 255.0.0.0
     ip nat inside
     duplex auto
     speed auto
    !
    interface FastEthernet0/1
     no ip address
     duplex auto
     speed auto
     shutdown
    !
    interface Serial0/1/0
     ip address 20.0.0.2 255.0.0.0
     ip nat outside
    !
    interface Serial0/1/1
     no ip address
     shutdown
    !
    interface Vlan1
     no ip address
     shutdown
    !
    ip nat inside source static 10.0.0.2 50.0.0.1
    ip classless
    ip route 30.0.0.0 255.0.0.0 20.0.0.1
    !
    !
    !
    !
    !
    !
    !
    line con 0
    line vty 0 4
     login
    !
    !
    !
    end

  12. switchport mode access
    switchport port-security
    switchport port-security maximum 1
    switchport port-security violation shutdown

    Switch#show port-security interface fastEthernet 0/4
    Port Security : Enabled
    Port Status : Secure-up
    Violation Mode : Shutdown
    Aging Time : 0 mins
    Aging Type : Absolute
    SecureStatic Address Aging : Disabled
    Maximum MAC Addresses : 1
    Total MAC Addresses : 1
    Configured MAC Addresses : 0
    Sticky MAC Addresses : 0
    Last Source Address : 000b.972c.0ea1
    Security Violation Count : 0

    It doesn?t work.
    any idea what I am doing wrong?

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