Server Fault
Server Fault

Questions tagged [gns3]

19 questions
4
votes
1 answer

Linux: STP does not converge among linux containers

I'm trying to create a lab in GNS3 with docker containers to understand more about spanning-tree. My lab is very simple: there are two Linux/Alpine containers with two links connecting them: -------- …
José Rios
  • 43
  • 3
2
votes
0 answers

Is there a way to automate testing for a GNS3 network topology?

I'm working on an MPLS backbone topology using GNS3, this topology includes configuration of several networking technologies such as IPv6, BGP, OSPF, IPv6 to IPv4 dynamic tunneling, MPLS based VPNs, MPLS based traffic engineering... So I'm a…
Chedy2149
  • 223
  • 4
  • 14
2
votes
1 answer

connecting to packet tracer from pc

How I can connect to a router that runs in Packet Tracer from the pc that the program (Packet Tracer) runs on it using telnet or Putty or SecureCRT or other shell programs? I use GNS3 but need to work with Cisco 2800 routers so need to use Packet…
Sam
  • 123
1
vote
0 answers

GNS3 - Connecting Emulalated IOS to TWO PHYSICAL networks

I have a CISCO c3725 router on GNS3 connected to two different and separate unique LANs via the CLOUD/HOST icon, attaching each of the virtual CISCO c3725 to my computer's physical NIC (NIC 1 and NI2.) I have also DHCP installed on both these…
etnemo
  • 57
1
vote
0 answers

xinetd service is up but not listening on port 23

I am trying to open a telnet connection from a Wheezy VM to a router in GNS3 but even though the ping is successful, I am unable to open a telnet connection from the VM to any of the routers. the connectivity is as such : VM > hub > router1 Note…
surya
  • 151
1
vote
0 answers

How to create a link between GNS3 and a VMWare Workstation VM that is totally isolated from the physical host?

My physical host machine runs windows server 2012 R2 with a DHCP server. I have the following topology in GNS3: Windows Server is the physical machine, it is connected to both VMNet 2 and VMNet 3 networks. Windows 7 is a Virtual Machine running…
Chedy2149
  • 223
  • 4
  • 14
1
vote
2 answers

GNS3 setup connected to real network. ping failure

I am building a lab environment for CCNA training, using GNS3. The GNS3 network is connected to a real network, let's call it LAN 1. LAN 1 is not connected to the internet and is completely wired Ethernet. A single instance of GNS3 runs on a…
T. Webster
  • 366
0
votes
0 answers

KVM host with GNS3 LAB

This is for SDN LAB in the GNS3 with Asterisk. I have KVM physical host in Germany (everyone knows where I guess). I have a GNS3 lab running on Debian VM with some more VMs inside Vbox there. I'm connected to Internet via GNS3 Cloud and it's…
JorgeRaggs
  • 1
0
votes
2 answers

Physical Interface VS Multipoint Subinterface in Cisco Frame Relay

I am new in learning about Cisco Frame Relay. And I am having trouble in understanding the difference between using physical interface or multipoint subinterface, because it looks the same to me. Example in the topology below: All routers are in…
randms26
  • 21
0
votes
1 answer

IP SLA: tcpConnect frequency and jitter codec

I am trying to generate different kinds of traffic with IP SLA on a c7200 router, I am using the simulation software GNS, so if required I can change my router. My aim is to generate congestion to see how my network react. But I have a problem with…
Vulpo
  • 123
0
votes
1 answer

RIP Advertising Networks of EIGRP without Redistributing

This is the topology I have set up in my GNS3. The RIP V2 protocol of Router R2 is recognizing and advertising the two networks that are advertised in EIGRP, even though the said information should only have been received through redistribution.…
gokul varma nk
  • 67
0
votes
1 answer

GNS3 - Emulating a not supported Cisco router (model 881w)

I want to create a new configuration for a Cisco 881w from scratch. So I want to replicate my environment on GNS3. But I cannot emulate a Cisco 881w (which is the router i have) into it. So I am wondering which other router supported by GNS3 should…
Jonathan Rioux
  • 1,988
0
votes
0 answers

How to connect gns3 simulated network to my physically existed network

I have a VM existing in one network and a c3660 R1 router in a different network within GNS3. I would like to establish connectivity between router R1 and my VM. The details for the VM and gns3 R1 router are as follows: VM IP address is…
Yaswanth Maddirevula
  • 1
0
votes
1 answer

GNS3 - Router doesn't forward DHCP Discover Messages

I wanted to post a picture of my network, but I don't have enough reputation, so I'm going to try to explain it without one: I have a router R1 which is the DHCP Server for my Network, which is connected (Interface f0/0) to a switch (SW1) and…
Syd
  • 3
0
votes
1 answer

Why a ubuntu virtual machine hosted in GNS3 can ping but cannot access local services?

I am experiencing an issue where my Ubuntu 20.04.4 virtual machine is unable to access any locally hosted services within the same network. The services are running on various machines within the network, and I can access them from my PC without any…
Reinis
  • 13
1
2