Cisco :: Configuring Basic Switching On GNS3?

Apr 13, 2013

I am trying simulate the next lab on GNS3 but the ping don't work between hosts on the same VLAN.

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Cisco :: Pbl With GNS3 In Configuring RIP

Feb 19, 2013

I'm using GNS3 in order to revise CCNA, the RIP part But I don't know why, i'v got a pbl with the routage table, especially with the metric which is wrong I don't understand wy the metric is always 1, because it should be 2 or 3 according to the network.

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Cisco Firewall :: Configuring ASA Simulation Interfaces On GNS3

May 25, 2012

I have managed to simulate to Cisco ASA's on GNS3 - ASA1 and ASA2. ASA2 is configured as multiple mode to enable contexts while ASA2 has been configured as single mode.
On ASA2 I can assign an IP address to its gigabitethernet interfaces as normal, however I'm unable to assign an interface to the gigabitethernet interfaces on ASA1.

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Cisco :: Configuring Ip Address Of Linux Lpbk (tap0) With Gns3 Router?

Nov 26, 2012

I am trying to connect my Ubuntu PC with gns3 router using loopback interface tap0, I am trying to configure the ip address of tap0 by using gns3 router as DHCP Server. But I am finding it difficult to do so.

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Cisco Switching/Routing :: Accessing GNS3 Router From Different PC

Sep 17, 2012

I've attached the file which shows the issue which im facing in reachability between a PC to GNS3 router.
Home Broadband ->LAN ( ---- Win 7 ( -->Loopback Adaptor(>GNS3(cloud-->Router (
Win XP (192.168.15)


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Cisco Switching/Routing :: GNS3 3745 No Switch Connectivity

Jul 18, 2012

am using GNS3, and have the 16port switching module. I have created a PC instance and connecting to f/0/0 which is a layer 3 port, I can connect via layer 3 IPs. I then reconfigured and connected the PC instance via a layer 2 port f2/0 which is part of the 16port switch module. All 16 ports are by default in vlan 1. I assigned an IP of to the VLAN and gave the PC I cannot ping and I cannot even ping, the VLAN 1 IP. [code]

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Cisco Switching/Routing :: GNS3 Multi-link Bundles To Different Routers

Apr 30, 2012

we are moving to different providers. We currently have multiple sites that have MLP bundles going to our current provider. We are trying to limit our network disruptions by creating a new MLP bundle group and connect it to the new provider, but are having no luck. In a GNS3 lab I have setup I am able to keep my existing MLP bundle up/up over the current provider network. When I attempt to bring up a new MLP group to the other provider my MLP does not come up and keeps going up/up then down/down and shows inactive. Is it possible to have one MLP group go to current vendor router, then create another MLP group and go to the other router?

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Cisco Switching/Routing :: 3750X - Basic Configuration

Jul 19, 2012

We currently have 7 Cisco 3524-XL switches (10-12+ yrs old) which are 10/100.  We purchased a handful of Cisco 3750X switches to replace them going with the whole stackwise and redundant power supplies.  Our current configuration on the old 3524 switches is that they have hardset all the ports on them to 100MB/FULL since devices would auto-neg to 100/Half. Since we're going from 10/100 to 10/100/1000 switches, I want things to auto-neg as I have heard in the past and experienced that things work better when it auto-neg to gigabit.  My upper management is afraid since the old switches wouldn't auto-neg correctly that we should hard set all the ports on the new switches, which would be a nightmare since some ports would be hard set to 100/FULL others to 1000/FULL, etc..  We've tested just about all of our devices at auto with the switches and they've all auto-neg to the correct speed. In short, is Auto-Negotiation the way to go with the newer switches or is it still better practice to hard set your ports?

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Cisco Switching/Routing :: 891W / Basic WAN Setup (IP And DNS)?

Feb 9, 2012

I am trying to configure the FE8 (WAN port) to connect to the Internet.  We're swtiching ISP'ssoon so this router was set up at my office and has since been deployed at the client site.  So far it is just plugged in and powered, with a console cable attached but no LAN cabling since this router will replace an existing one using the same addressing (except the WAN settings of course).  So for now I am just focused on working on the WAN side since I have the ISP's cable modem attached .  I had intiially used CP Express to config the wan port with an IP and mask and the various port forwarding options I intend to use.  Now, connected via console cable, I tried pinging the IP of the wan port, which works.  Beyond that, can't ping anyting ( - a Google IP), also can't resovle any DNS names which makes sense with no apparent connectivity.  Likely my config is just imcomplete.  Nowhere in sh run do I see a Default Gateway, yet this ISP did specify one so I assume I need to enter it.  Not sure what's the right way - I get confusing results on searches telling me either to use ip default-gateway or ip default-network.  I want to think that it's as simple as entering in the IP but so far I've learned with the IOS that you never do anythign without knowing all the possible implications, which I don't.  Also while I am at it, I don't know what I should have for DNS entries.  This router will not be a DNS server for any internal systems that function will be managed by the two Windows 2008 R2 DNS machines.  The ISP has also provided two IP's for their DNS servers.  I thought it would be a simple matter of just adding two entrires via ip name-server command, which I did.  So now I have four entries, first the two internal servers (inaccessible currently due to no LAN cabing to this router), and the two ISP servers.  Can't ping those either, but again there's no default gateway. 

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Cisco Switching/Routing :: Does IOS 12.4 Basic Have (IP NAT Pool) Command Available

Sep 23, 2012

Cisco IOS 12.4 Basic check to see if the command "ip nat pool" is available?We have 12.2 basic and I know it is in the 12.4 Advanced and 15.1 Basic versions (too large of a jump in version for management).  Our budget is very limited so I am hoping that 12.4 Basic has this command.

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Cisco Switching/Routing :: 4900M - Basic Configuration And Administration

Jan 1, 2013

First time user of cisco hardware and we just purchased the 4900m catalyst switch.  My question is very general.  I am simply hoping to network 3 servers together and I do not wish to do any fancy or advanced configuration.  Can I simply use the web management interface for network administration and setup?  I just downloaded the Catalyst 4500 Series Switch Cisco IOS software configuration guide and they talk about Cisco View network management system, is this my answer or is this what most people use for basic configuration and administration?

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Cisco Switching/Routing :: Cat 3750 Stack Basic Settings?

Dec 13, 2011

attached diagram and following is the basic configuration on L3 and L2 switch. Is this configuration sufficient for simple routing?
switch 1 priority 15
switch 2 priority 10


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Cisco Switching/Routing :: 4900M Basic Management Setup

Apr 13, 2010

I' ve three 4900M switches equipped with the WS-X4920-GB-RJ45 module and the WS-X4908-10GE module. Now I'm started to setup these switches in our lab environment for the first time. They behave a little bit strange in comparison with the C3750 series which I used before and which I will replace by these powerful machines.

I tried to setup these switches to be managed through the management port. I configured IP address, default route in the management vrf, set the source-interface for tftp,ssh,ftp and tacacs to use the management port. Ping using the manangement port was successful. After finishing theses steps I configured the TACACS and AAA settings accordingly the informations I found on CCO. I tested the settings with "test aaa group authentication" command- without success. On my Cisco ACS no request was received and the switch told me he could't reach the tacacs server. Other switches in the same IP subnet are working without failure, so firewall or server should not be the problem.

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Cisco Switching/Routing :: GNS3 - Stub Router Not Updating Routing Table - EIGRP

Nov 14, 2012

We have small which I'm looking to implement and have built this on GNS3.
We have:
Router A in site 1
Router B in site 2
Router C in site 3
Router A and B are connection via a point to point 100M link and from Router C we have a 2 point to point one of which is 5Mpbs and going to Router A and Router B.
For Router C to reach Router A network it will go via Router B and these are 100M connection. When the link between Router A and B goes down. Router C should update and start using the 5m route.
For some reson, the routes are not updating. I have to do 'clea ip eigrp ne' for the routes to update and if I reload the routers all works well, it seems the problem is intermittent.

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Cisco Switching/Routing :: 2821 Multicast Routing Relay Basic

Mar 12, 2013

I  start configuring Cisco 2821 router for multicast . First short  description and attached sheme explanation. Let we say  I have small  network with 100 users. One router and Cisco switch 3560. Two VLAN’s,  one for data another for multicast. Data from internet works fine but  now I want to connect multicast servers (or source of more multicast  streams) from another subnet. Router have three interfaces.I expect there should be no problems with multicast configuration, but unfortunately it is not like I expect. What I did ?

First step:  enable multicast routing

Second step: on both interfaces (Fe 0/1 and Fe 0/2)  - ip pim sparse-mode

Third step: configure switch that users are connected to access port in VLAN 222 (temporary to see if multicast work)
When  I start VLC on computer nothing happend. If I try to connect computer  on same subnet where is source of multicast streams it works fine.What  I am doing wrong ? Is there anything about routing ? All subnets are  directly connected. RP is not needed if I have one router or ?

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Cisco :: IDS Image For GNS3?

Jan 7, 2013

Have anybody direct link to download IDS image for GNS3 ?

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How To Connect LAN PCs With GNS3

Sep 13, 2012

I want to ping my GNS3 routers from my real LAN PCs. Right now I am able to ping those GNS3 routers from real PC on which GNS3 is installed. The network topology is something like this.

-IP of GNS3 PC on which GNS3 is installed. default gateway of LAN:

I have created a loopback adapter and assigned the IP address of (IP is also of same LAN) the cloud and virtual router is dragged and router interface is assigned the IP I am able to ping my router interface from (System on which GNS3 is installed). What I want is to ping my router's interface from other LAN PCs line, 192.168.105 or from my gateway

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Cisco :: Multicast Lab In Gns3 With A Tap Interface?

Feb 20, 2013

I am trying to do a Multicast lab in gns3 with a tap interface in os x and a linux vm in virtualbox. The os x box is broadcasting to I have verified IP connectivity. I am using PIM dense mode. When I perform a packet capture on the tap interface I see no traffic to However when I ping from os x I see the traffic. Attached is my topology

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Cisco :: Can't Ping From ASA To Host In GNS3

Apr 24, 2012

I test all devices using ping command, from ASA to router was fine (on both interface) but not to Host , and host to router was fine, but only on directly interface(F1/0), and to ASA was not success. am i miss something in my configuration?

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Cisco WAN :: GNS3 Track 1 IP SLA Command Not Available

Dec 20, 2011

I was just brushing up few things in GNS3 and after setting up an SLA.Now when I want to set the track ip I get not option for sla why??I am running  c3725-adventerprisek9-mz.124-15.T5 shouldn't it be available?

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Cisco Firewall :: Simulating ASA 8.2 In GNS3?

Oct 18, 2010

Any one has succeeded in simulating ASA 8.2(not ASA 8.02) in GNS3 ?
I see some are very close in getting it running on GNS3...

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IOS Image For GNS3 / Dynamips?

Apr 30, 2012

I get an IOS image for GNS3? I dont work in a company that would do that for me

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Cisco Firewall :: ASA IOS Version 8.4 Download For GNS3

Apr 2, 2013

I have to test new Cisco ASA's IOS version 8.4 in my GNS3 LAB . do provide the link for downloading the same.I dont have direct download access from

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Cisco Firewall :: ASA 5540 Simulation In GNS3

Jan 26, 2013

I have to use GNS3 for simulate ASA5540.but it does not work. I've installed latest GNS3( all in one) in Win7 32bit environment, and used IOS file is asa842-k8.bin.but i can't unpack it properly. it said "Couldn't find any ZIP header in asa842-k8.bin".

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Cisco Firewall :: Setup ASA Configuration With GNS3?

Jan 12, 2013

I'm about to setup as ASA configuration with GNS3 ASA. how to best test the configuration once complete? I need something like a verification plan to ensure that the configuration would perform if in production.

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Use GNS3 For ASA 5500 Firewalls Along With ASDM?

Jan 3, 2012

How many of you use GNS3 for ASA 5500 Firewalls along with ASDM? While I am on the subject of GNS3 I had a questions about the new version and the capture feature. I installed the latest version last night with the new live capture features but it seems to be only one way capture. T Is there a way to fix this?

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Cisco WAN :: GNS3 Additional BGP Process On Single Router

Jun 16, 2012

I need to be able to  run more than one BGP routing process on my lab router. I have over   connected BGP routers connected to my live production network and I  need to emulate the production network with GNS3. However, BGP rules  only allow a single BGP routing process on a single router. how to overcome this limitation for my lab?

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Cisco WAN :: GNS3 / Router CPU Usage Stress Test?

Dec 7, 2012

how to stress a GNS3 router in order view an increase in its CPU usage?

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Cisco VPN :: GNS3 - AnyConnect Client Profile In ASDM

Sep 21, 2012

I am trying to configure a client profile under the Any Connect Client Profile tab in the ASDM but keep getting an error message stating "Check that you have a proper Any Connect package installed in the Any Connect Client Software menu.  Also check that your ASDM username have enough privilege." My user has sufficient privilege but I am not sure which Any Connect software I should have to enable this.  Right now I have anyconnect-win-3.0.10055-k9.pkg installed. This is a lab setup using GNS3.

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Cisco :: Can Entire CCNA / CCNP Sec Track Be Emulated In GNS3

Nov 14, 2012

I'm reading the CCNA Sec book (554) and I've just finished a few chapters on CCP.Is the tool free? Can it be simulated in PT, or emulated in GNS3? Speaking of which, can the entire CCNA/CCNP Sec track be emulated in GNS3?

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Cisco Switching/Routing :: Configuring PBR On 300 Series

Jun 1, 2013

Configuring an application using routing mode on cisco ace clients ---asa--3750--cisco ace--- servers behind vip,visa card transaction servers.i am able to setup a vip on ace using routing mode on ACE,as the  servers need to see the client ip ,so we are not  performing SNAT,this  part is working fine,when a request comes from the client ,it goes to the vip and to one of the backend servers ,and the request will be forwaded back to the ace ,as the default gateway on the servers is pointing to the server vlan on ace.but if the transaction from the servers need to go to the visa card transaction servers ,how can we achieve this ,and after fetching the data from visa servers,does the reply will be fwd to the ACE or ASAs directly.

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Cisco Switching/Routing :: 891 - Configuring FTP On Port 990?

May 25, 2012

I currently have a Cisco 891 running with a FTP running on port 21.  I currently have the NAT from external IP to and internal IP for port 21.  And the firewall allowing that traffic through and client software is working fine.  However I need this FTP to be running on port 990 and anytime I change the NAT and the firewall, the external FTP clients connect but then drop when recieving the directory listing. 

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Cisco Switching/Routing :: Configuring Qos In 2960?

Feb 21, 2013

I have IP phones connected to 2960 i want to segregate traffic traffic comming from IP phones which has a COS value of 5 and want to allocate a band width of 200 MBPS for those traffic .
Can any one share sample QOS configuration for achiving this in  2960 ?

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