Off the topic: Dynamips (again)

NetworkGod · April 2007

I know a couple of you guys got multiple machines connected through a switch (or a couple of switches).. Would you please help me out, i got 2 machines, trying to get them to work together, maybe a sample file would be helpful! Thank yous in advance.

mikej412 · April 2007

Are you using Dynagen? Or just Dynamips?

Dynagen ships with the multiserver sample topology.

NetworkGod · April 2007

I use Dynagen,
i have a lab setup with 2 Dynamips servers running on the same server, 7200 and 7201 ports. What i would like is to take the second part of the lab (7201 port) and put it on a different PC, since loading all 12 routers maxes out my CPU (even with idlepc values set)
I found the sample lab (multiserver.net) but it's not clear at all
do you put machine's host name in []'s or something? I don't quite get it, will try to look at Dynamips forums too..

Ferret999 · April 2007

All you need to do is put the second machines IP address in your .net file following the multiserver template. Then start dyanmips on both machines and then run the dynagen .net file from your main machine.

NetworkGod · April 2007

OK, now that i got that problem solved i got another question.. Regarding NM-16ESW module, i'm trying to emulate it to practice my BCMSN studies (STP tuning, VLANs etc.). Does NM-16ESW support STP?

mikej412 · April 2007

NetworkGod wrote:

do you put machine's host name in []'s or something?

Either a machine name (if you have DNS name resolution or a host file entry, or maybe even WINS) or IP address. It will default to port 7200.... so you don't need that, unless you want to run multiple Dynamips instances on the remote machines.

# Working with multiple dynamips servers

autostart=false
[localhost:7200]
    workingdir = \Program Files\Dynamips\sample_labs\MY_multiserver_test\working

    [[7200]]
    ghostios = true
    image = \Program Files\Dynamips\images\c3725-adventerprisek9-mz.124-7.image
    ram = 160

    [[ROUTER R1]]
    # Connect to s1/0 on R2 running on a different server
    s1/0 = R2 s1/0  

[192.168.200.181:7200]
    workingdir = \Program Files\Dynamips\sample_labs\MY_multiserver_test\working
    [[7200]]
    ghostios = true
    image = \Program Files\Dynamips\images\c3725-adventerprisek9-mz.124-7.image
    ram = 160

    [[ROUTER R2]]

And then I did another test from my core2 laptop just controlling remote dynamips servers.

# Working with multiple dynamips servers

autostart = False

[192.168.200.41]
    workingdir = \Program Files\Dynamips\sample_labs\MY_multiserver_test\working
    
    [[3640]]
        ghostios = True
        image = \Program Files\Dynamips\images\c3640-jk9o3s-mz.124-5a.image
    
    [[ROUTER A1]]
        s1/0 = B1 s1/0
        s1/1 = A2 s1/0
        model = 3640
     
    [[router A2]]
        model = 3640

[192.168.200.181]
    workingdir = \Program Files\Dynamips\sample_labs\MY_multiserver_test\working
    
    [[3640]]
        ghostios = True
        image = \Program Files\Dynamips\images\c3640-jk9o3s-mz.124-5a.image
    
    [[ROUTER B1]]
        s1/1 = B2 s1/0
        model = 3640
    
    [[router B2]]
        model = 3640

NetworkGod wrote:

Does NM-16ESW support STP?

In real life -- yes. In Dynamips.... um, the IOS is emulated, the hardware is simulated -- so the layer 2 stuff still needs a bunch of work. You can enter the commands (that are supported) and get output.... but the results will probably be different than if you were using real hardware.

I did a simple 3 router with 3 NM-16ESWs and connected them in a loop -- and had no blocking ports. But the good news was that I didn't seem to have an internal broadcast storm either. I haven't tried it again with the latest Dynamips/Dynagen since I'm busy with something else at the moment (for the next couple of months).

Off the topic: Dynamips (again)

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