Cisco-Linksys E4200 Maximum Performance Simultaneous Dual-Band Wireless-N Router

Cisco-Linksys E4200 Maximum Performance Simultaneous Dual-Band Wireless-N Router





Sunday, May 29, 2011

Cisco Ipv6 Training Enabling Ipv6 on a Cisco Router

Review

Now in order for you to allow (enable) a Cisco router to begin routing Ipv6 packets, you'll need to achieve the following two tasks. 



Enable Ipv6 routing globally on the router; and then enable Ipv6 processing on a singular interface(s).
 
To begin completing task number one (enabling Ipv6 routing globally on a router) you'll need to enter Global Configuration mode and type ipv6 unicast-routing on the router like you see here:
 
Router>enable
Router#configure terminal
Router(config)#ipv6 unicast-routing
Router(config)#exit
Router#
 
Notice, that I typed the word "enable" while the router was in User Exec mode (Router>) which then placed the router into Privileged Exec mode (Router#). Then once the router was in Privileged Exec mode (Router#) I typed the words "configure terminal" which then placed the router into Global Configuration mode (Router(config)#) so I could begin configuring the router to globally route Ipv6 packets; and as you can see, I typed the Global Configuration command "ipv6 unicast-routing" to faultless task number one.
 
So, to make a long story short, the command that you need to type on a Cisco router to enable it globally for Ipv6 packet routing is "ipv6 unicast-routing".
 
Now, that I've successfully completed task number one, I typed the word "exit" to leave Global Configuration mode (Router(config)#) and re-entered into Privileged Exec mode (Router#).
 
Router>enable
Router#configure terminal
Router(config)#ipv6 unicast-routing
Router(config)#exit
Router#configure terminal
Router(config)#interface fastethernet 0/0
Router(config-if)#ipv6 enable
Router(config-if)#
 
Now, since the router is back into Privileged Exec mode (Router#), I prolonged on to completing task number two (enabling Ipv6 processing on a singular interface(s). By re-typing the command "configure terminal" which placed the router back into Global Configuration mode (Router(config)#), so I could use the "interface" command to specify the interface type (fastethernet) and its slot and port facts (0/0). Notice, that the router has entered into Interface Configuration mode (Router(config-if)#) by hitting the enter key, and once the router was in Interface Configuration mode (Router(config-if)#); I used the interface command "ipv6 enable" to enable the fastethernet 0/0 interface for Ipv6 processing to faultless task number 2.
 
Here's an additional one way the previous commands could have been typed:
 
Router>enable
Router#configure terminal
Router(config)#ipv6 unicast-routing
Router(config)#interface fastethernet 0/0
Router(config-if)#ipv6 enable
Router(config-if)#exit
Router#
 
Notice, that it wasn't well principal to leave Global Configuration mode (Router(config)#) to faultless both tasks; I just did it, to show you each task individually.
 
I invite you to visit my website were you'll find the newest facts concerning Cisco Ipv6 create and Implementation Techniques.
 
To your success,

Cisco Router

Cisco Ipv6 Training Enabling Ipv6 on a Cisco Router
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Cisco Ipv6 Training Enabling Ipv6 on a Cisco Router

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Wednesday, May 4, 2011

Cisco Certification - How a Cisco Router Boots

Review

Cisco Router Boot Sequence





Here we are going to discuss from a high level of how a Cisco Router boots after you flip the power switch to on which will support you in your Ccna studies. For the most part, the introductory boot process is controlled by the BootRom which constantly shop the startup diagnostic code(Rom Monitor). The main task of the BootRom is to run the Power On Self Test(Post), which are the hardware diagnostics, and to load the Cisco Ios software from the Flash(in most cases) to memory. Note that the Boot Rom is not erasable.

Cisco Router

1. The BootRom will initialize the hardware and run through the Post to make sure there are no hardware errors and the Cpu and interfaces are all fully functioning. If there is some sort of error, you will see it in the Post as the router begins to boot

Cisco Certification - How a Cisco Router Boots
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2. Next the BootRom locates and loads a valid Cisco Ios image. Below you will find the process that the router will go through to load the Ios image:

The router first checks the Flash for a valid Ios. If there is none found in Flash and it has a isolate Boot-Helper image, it can load the Ios via a Tftp server(netboot) Finally, as a last resort it will load the RxBoot mini-Ios that is found in Rom.
3. The router then checks the Configuration Register value (Nvram) to see where to load the router configuration file from. By default this is stored on an Eprom named startup-config which does not lose its contents when the router is powered off. If a valid startup-config file cannot be found, the router will load the theory Configuration Dialog, which basically drops you into Setup mode. Then you will be able to perform the introductory configuration of the router via a menu. Finally, there are assorted configuration-register options you can set to convert the default behavior which will be covered in other article.

Cisco Certification - How a Cisco Router Boots

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