For CCNA and CCNP candidates, it's hard not to laugh the first time you hear the phrase "router on a stick". Let's face it, that's a pretty silly term. But as those who have passed the CCNA and CCNP exams know, this is a vital exam topic that you must know how to configure and troubleshoot.
Laptop Battery Basic Cisco theory states that for hosts in different VLANs to communicate, a Layer 3 device must be involved to handle the routing between the VLANs. That device is a router, and there are special considerations that must be taken into account for both the physical router itself and the configuration you'll be writing.
"Computer industry analysts estimate that some 60 percent of all corporate data exists only on desktop and laptop computers, " said Walter Scott, CEO of Acronis. "Incorporating Acronis True Image with New Mexico Software backup server is the ideal solution to capture that corporate data and ensure that it is not lost. While traditional server backups are effective for protecting server data, every company should have a combination of server and workstation backup plans."
Thinkpad The router will be connected to a switch via a FastEthernet port (or higher). The router port cannot be a regular Ethernet port, since the router port will need the ability to send and receive data at the same time.
And then, of course, we have the Standalone Server product, which is called Acronis True Image Server for Windows or Linux and that will manage a single standalone server. What type of computers can we back up, because in a medium to a large sized, even some small sized businesses, who knows what kind of computers they have They may have laptops, they may have desktops, they may just have anything and everything
Microsoft The configuration of the interface is where things get interesting. Let's say we have two VLANs that will be using router-on-a-stick to communicate. Here is the VLAN information:
[top_a2] [top_a2_title_1] Fi Network For information about connecting to a hotspot, connecting to your printer dock, or connecting to your computer, use the Interactive Troubleshooting Guide.
Laptop Computers VLAN 20: 20.20.20.0 /24
VLAN 40: 40.40.40.0 /24
It' - the included Setup Wizard takes you through configuring the Router, step by step. The Router can act as a DHCP server for your network, so your PCs are configured automatically. Play (UPnP) lets specialized Internet applications configure the Router so you don't have to. in NAT technology helps keep intruders out of your computers.
Laptop Computer The port on the switch that will be connected to the router's FastEthernet port must be in trunking mode, and you must know the trunking protocol in use. We'll go with the Cisco-proprietary ISL here.
Description Have a friend with a laptop Do they always complain about the heat Cool them down with HandStands' Cool Lift. Designed to help promote air flow and reduce heat, the Cool Lift is perfect for notebook computers with the latest hot processors from Intel, AMD, Motorola, or IBM. Proof Shields for Laptops help prevent scratches from normal laptop use. Proof Shield. It even completely disappears when applied!
Desktop Computer The physical FE port on the router will not have an IP address. The use of router-on-a-stick mandates the use of logical subinterfaces. While we don't have to use the VLAN numbers for the subinterface numbers, I've found this helps you keep the interfaces straight. One subinterface must be given an IP address in VLAN 20, and the other will have an IP address in VLAN 40.
Notebooks After creating subinterfaces fast 0.20 and fast 0.40, the config looks like this:
Lenovo interface fastethernet0
Hard Drive no ip address
Travelstar interface FastEthernet 0.20
Gateway ip address 20.20.20.1 255.255.255.0
Laptop Parts interface FastEthernet 0.40
Software ip address 40.40.40.1 255.255.255.0
Hard Drives Believe it or not, you're almost done! Now we need the encapsulation statement under each subinterface. The subinterface statement must reflect both the VLAN number and the encapsulation type being used. When we're finished, the config would look like this:
Electronics interface fastethernet0
Canon no ip address
Desktop Pc interface FastEthernet 0.20
Desktop Computers ip address 20.20.20.1 255.255.255.0
Think Pad encapsulation isl 20
Repair interface FastEthernet 0.40
Data Recovery ip address 40.40.40.1 255.255.255.0
Cisco encapsulation isl 40
Keyboard And that's it! Your hosts in VLAN 20 should now be able to communicate with hosts in VLAN 40, and vice versa.
Monitor A couple of final troubleshooting points - the most common error with router-on-a-stick is to put the wrong vlan number in the encapsulation statement. Also, make sure you have configured the router's IP address in VLAN 20 as the default gateway for hosts in VLAN 20, and do the same for VLAN 40.
Desktop I hope you've enjoyed this look at router-on-a-stick. While the name may get a chuckle out of you, it's still used in quite a few networks out there, and knowing how to configure and troubleshoot it will get you that much closer to earning your CCNA and CCNP.
Infosys
Refurbished Laptops Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage (http://www.thebryantadvantage.com), home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, Ultimate CCNP Study Packages, and CCNA CBT video training. Pass the CCNA exam ,BSCI exam , and BCMSN exam with Chris Bryant, CCIE #12933!
Wipro For a copy of his FREE "How To Pass The CCNA" or "How To Pass The CCNP" ebook and receive a FREE CCNA and CCNP question every day, just visit the website and claim your free copies!
[ Comment, Edit or Article Submission ]
