Download Qemu guest IOS image for gns3

Qemu Image for GNS3:

Qemu Guest is used as a virtual PC in GNS3, one of the stable IOS image for qemu is linux-microcore-2.10. You can download it for this link : QEMU IMAGE FOR GNS3

For configuring IP address and gateway of qemu host in Gns3 you can visit configure Qemu in Gns3.

Download IOS for EthernetSwitch in GNS3 | IP addresses may not be configured on L2 links (solved)

Layer 3 switch for GNS3:

In GNS3 VirtualBox Edition Ethernet switch router is nice addition, using this emulated device you can perform different switching task like:

·         VTP (VLAN trunking Protocol)

·         VLANS

·         Inter-VLAN routing

·         SVI

You can assign an IP address to Ethernet switch router’s interfaces. You may receive the following error while configure the IP address for interface of this emulated device (Ethernet switch router).

“% IP addresses may not be configured on L2 links.”

If you find this type of error message then under the port you want to configure, run the command “no Switchport” and try the IP command once again.

Download layer 3 switch IOS (Integrated services router) for GNS3:

You can download this IOS with this link:  IOS for EthernetSwitch

baseconfig.txt GNS3 Error | Download Baseconfig.txt file

Baseconfig.txt: No such file or directory | 203-bad number of parameters (5 with min/max 2/2)

You may get the above message while inserting some of your router IOS in GNS3, normally this happen only to switch IOS for gns3 and all other devices IOS like routers, Qemu, computer, frame relay and server are working fine.

And after that when you try you start this router you may received message: 

203-bad number of parameters (5 with min/max 2/2)

Gns3 shows above message when there is not configured a proper path for basefile.txt file, basefile.txt contain the basic configuration or default configuration for respective IOS. You can configure the basefile in gns3 by following steps:

1. Download the basefile.txt for Gns3 from this link.
2. Open "IOS images and hypervisors" windows from edit menu.
3. locate the basefile.txt that you have download in step-1
4. Once you can finished the above steps, click on save.

Hope this article is helpful and informative for you and i like to thank you for reading this article.

Download Cisco 7200 series Router IOS for GNS3

Router IOS for GNS3:

Cisco 7200 series routers are enterprise or edge routers normally used at service provider edge or as a WAN edge. These Cisco routers have some advance features like Broadband aggregation, MPLS, IP Security VPN (IP Sec VPN), IPv6 routing and some other ISP features. Also provide Voice, video, and data integration: TDM-enabled VXR chassis and voice port adapters.

You can test and try some of these features on GNS3, you download its IOS from following link:

Cisco 7200 series Router IOS

Cisco 2900 series IOS for  gns3



Thank you..! Learn Cisco Commands

PIX Firewall IOS for GNS3 free Download

Download PIX IOS for GNS3:

Cisco PIX (Private Internet eXchange) is a most famous firewall security Appliance and also commonly used for network address translation (NAT).  In 2008 Cisco announced PIX end-of-sale and continued its new firewall know as Cisco Adaptive Security Appliance (ASA), that have much of PIX features. Cisco ASA was introduced In 2005. Although PIX is end of Sale, but we still have many networks where PIX is still running so it is still important for your professional experience. 

You can also run PIX IOS on GNS3 and can practice different security lab at home. you can download PIX IOS from following link:
Download PIX IOS

For Lastest ASAv 9.7 IOS for GNS3 click here.
Note: there is not enable password set for this IOS, if it asked for password simply press enter-key.

Configuration of PIX IOS image in GNS3 is very simple and easy:

1. Locate it IOS path in "Binary image".
2. Set its name in "identifier name".
3. And then click on save and OK.

for more details you can visit configuration of PIX in GNs3.

Download ASA IOS/Image for GNS3

ASA Image for GNS3:

You can run the ASA on your GNS3 by configuring the ASA IOS on GNS3. For configuration of ASA on GNS3 you need following two image files:

Kernel File: Download ASA kernel IOS

Initrd File: Download ASA Initrd file

OR Download latest ASAv 9.7 Virual IOS image File for GNS3

For configuration of ASA on Gns3 you can visit how to add ASA in Gns3 1.1 or just review the following figure.

For new version:

Where you need to perform only three steps:

1. Type identifier name
2. Browse the initrd file
3.  Define the path for kernel file and click on save.

Download Cisco Switch IOS for GNS3

Cisco switch ios for gns3:

In Gns3 by default there is no such option for creating switch topology, but you can use the router as a switch with NM-16ESW module. There are number of IOS which can support NM-16ESW module, one of most common Switch IOS for GNS3 is 3600 series c3640.

Using this IOS you can perform different Gns3 labs like:   

• VRRP on GNS3
• HSRP configuration on GNS3
• SVI configuration on gns3
• Inter vlanrouting on gns3

You can download gns3 switch IOS from following link:

Download 3600 series GNs3 IOS for switch

Download 3700 series IOS with switching functionality for GNS3

Download 3640 IOS GNS3

You learn how to use switch in GNs3.

Hub vs Switch vs Repeater | LAN Devices Comparison/differences

What is Repeater in Computer networking?

Repeater is physical layer device, it works on the physical layer of OSI model. Repeater are used to amplify signal and it is actually a signal regenerator. The repeater extend the length of the LAN segment, provide the long distance communication. The most typical application of the repeater is to connect two or more segments of the Ethernet cable, its purpose is to extend the length of the network and however extension is limited.Active hubs are example of repeaters. They are the cheapest way to connect two or more computers together. In modern networks we are using the wifi repeaters.

Repeaters can be connected to the same transmission medium of the same LAN and also may connect different kind of LAN transmission medium (for example: coaxial cable with Ethernet).

What is Hub in Computer networking?

Hub are physical layer device and provide common connection points for multiple devices on Ethernet.Hub is pure hardware device and there is no system software. Hubs mainly used to connect computers and other network terminal within LAN.
In Hub bandwidth is shared, only one device can send the data at a time, all other devices must have to wait, once the sending is finished then the bandwidth used by the other devices. Thus the hub is consider to a network collision domain.

Hubs cannot determine the destination of the packet and type, so it forward broadcast packets, and all devices send data as a broadcast to each interface, so hub is consider as multiple broadcast domain.

Switch in Computer networking?

Switch works at the data link layer (second layer) of OSI model. Switch breaks Ethernet segment into multiple collision domains, each port/interface on the switch is a collision domain so device connected to switch does not conflict with other communication interfaces.
Switch is more intelligent device as compare to hub it has software or operating system. Switch forward the packets on basis of MAC address. Whenever switch forward the packets to some device on network it also stores its MAC address into its MAC address table and once the MAC address table is build up, next time data will not be sent as broadcast but sent to interface, saving the interface bandwidth.
End point switches not only can record the MAC address table, you can also divide VLAN (Virtual LAN) to isolate the broadcast, but also inter VLAN communication you need a router.

Difference between Hub and Switch:

Hubs are the pure hardware for connecting network terminal and cannot break collision domains and broadcast domains.
Switch: with software system used to connect to the network terminals, able to break collision domains, but not split broadcast domains

Following table provide us the quick comparison of each Network device:

Device	OSI Layer	Transparent Or Protocol Aware?	Boundary	What It Understands
Repeater	Physical Layer (Layer-1)	Transparent	Amplify signal	Bits
Hub	Physical Layer (Layer-1)	Transparent	Amplify signal	Bits
Bridge	Datalink Layer (Layer-2)	Transparent	Collision domain	Frames
Switch	Datalink Layer (Layer-2)	Transparent	Collision domain	Frames
Router	Network Layer (Layer-3)	Aware	Broadcast domain	Packets
Layer 3 switch	Network Layer (Layer-3)	Aware	Broadcast domain	Packets

Cisco ISR Vs ISR-G2 Features Comparison

Cisco Integrated Services Routers:

The Integrated Services Routers (ISR) is an integrated multi-service routers and is leading a new era of Cisco products, pioneered the ability to secure, wire-speed delivery of concurrent data, voice and video services routers, including new platforms and wireless services.

Cisco Integrated Services G2 Routers:

The Cisco ISR G2 router series has the intelligence and scale to transform service delivery for cloud, mobile devices, and multimedia applications, providing optimal user experience, exceptional security, and simplified operations. (Ref: http://www.cisco.com/en/US/products/ps10906/Products_Sub_Category_Home.html)

Features	Cisco ISR G2	Cisco ISR
Network processor	Multicore network processor with future expandability	Cisco ISR device normally have Single network processor
IOS image	Single universal IOS image	Multiple images
WAN performance	Up to 350 Mbps with services	Up to 45 Mbps with services
Redundancy	Field-upgradeable motherboard	Single motherboard
Service module performance and capacity	Up to 7X with dual core and 1 TB storage	1X and 160 GB storage
Onboard DSPs	Voice- and video-ready DSPs	Voice only
Switch modules	Fast Ethernet/Gigabit Ethernet with POE+ based on Catalyst 3560E/2950	Fast Ethernet with Power over Ethernet (PoE); based on Catalyst 3750
Services delivery	Field-upgradeable motherboard	Hardware-coupled
Energy efficiency	Real-time power reporting	EnergyWise

Default Administrative Distances for IP Routes

What is Administrative Distance?

Administrative distance refers to a routing protocol routing credibility. Every routing protocol by low reliability, in turn assigned a trust level, the level of trust is called administrative distance.

List of Default Administrative Distances for IP Routes for Cisco Routers

Following is the complete list of administrative distances of all IP routes/links that a router uses to forwarding the IP packets.

IP Route	Administrative Distance
Connected interface	0
Static route directed to a connected interface	1
Static route directed to an IP address	1
EIGRP summary route	5
External BGP route	20
Internal EIGRP route	90
IGRP route	100
OSPF route	110
IS-IS route	115
RIP route	120
EGP route	140
External EIGRP route	170
Internal BGP route	200
Route of unknown origin	255
Huawei routers
Direct route	0
IGRP	80
RIP	110
OSPF	150
BGP	170

Access GNS3 Router with Cisco SDM

Cisco SDM (Security Device Manager) is a Web-based application that provides the GUI for different Cisco routers, with this you can easily troubleshoot complex network and VPN connectivity issues. Also Cisco SDM a useful application for non-cisco professional who don’t have the enough knowledge of Cisco commands, they can configure Cisco Devices with SDM easily. In this article I will show you that how you can access and connect a GNS3 virtual router thought Cisco SDM (Security Device Manager). You need to follow the below steps to accomplish this.

ü  Install Cisco SDM

ü  Configure GNS3 Router for SDM

ü  Connect router to SDM

Install Cisco SDM:

You can download SDM from Cisco.com or from many other website. Installation of Cisco SDM is straightforward and you just need to follow a simple wizard.

Configure GNS3 Router for SDM

Cisco SDM is a web base Device Manager for Cisco devices, when you use SDM its involve HTTP and HTTPs protocol and you need to enable these two protocols on Cisco Router so that you can access it from Cisco SDM. You can enable the HTTP and HTTPs on Cisco router by following commands.

Router(config)#ip http server</div> Router(config)#ip http secure-server</div>

For demonstration I have created the following lab in GNS3 and I have following Applications in this gns3-lab:

GNS3 version: GNS3-0.7.4-win32-all-in-one

Router IOS: 7200 series (c7200-jk9s-mz.124-13b)

OS: Windows XP with Internet Explorer 8

I have connected the R1’s f1/0 interface to gns3-cloud so that internal Gns3 router can be accessible from my local computer. For configuring a cloud you need to add your Ethernet interface in cloud-configuration. Now you can connect the router Ethernet interface with this cloud interface. You can learn more about use gns3 cloud.

R1 Configurations:

R1(config)#interface f1/0 R1(config-if)#ip address 172.16.8.239 255.255.255.0
(Since I have connected this interface with physical LAN connection which has IP address 172.16.8.148, you can use IP scheme according to your setting.)

R1(config-if)#no shut R1(config)#interface f1/0 R1(config-if)#ip address 10.0.0.1 255.0.0.0 R1(config-if)#no shut R1(config)#ip http server R1(config)#ip http secure-server R1(config)#router rip R1(config-router)#version 2 R1(config-router)#network 10.0.0.0 R1(config-router)#network 172.16.8.0

R2 Configurations:

R1(config)#interface f1/0 R2(config)#interface f1/0 R2(config-if)#ip address 10.0.0.1 255.0.0.0 R2(config-if)#no shut R2(config)#ip http server R2(config)#ip http secure-server R2(config)#router rip R2(config-router)#version 2 R2(config-router)#network 10.0.0.0

After above configuration you can ping your virtual routers IP 10.0.0.2 and 172.168.8.239.

Connect router to SDM

Now open the SDM and type the IP address of router, in my case it is 172.168.8.239 and it will open the following console.

After some processing it will open the SDM in internet explorer, it may ask you for enabling ActiveX Setting, click yes.

Note: It may show you the following screen and stop on this windows, in this case you just need to press F5 and click yes for ActiveX Setting.

Now you can access you Virtual router with SDM and can configure and practice the virtual router with GUI interface. Hope this will work for you.