Dynamips : How to get 10% CPU load only !

Hello all,

I found a nice info about Dynamips today. With the IOS image mentionned below, you’ll be able to run up to five 7200 routers and have a cpu load around 10% !!

IOS Image	IdlePC	%stable CPU Usage
c7200-jk9o3s-mz.124-7.bin	0×608049e8	<10%
c7200-pk9u2-mz[1].124-17.bin	0×60848e80	<9%

Enjoy

New page : Tools

Hello all,

I just published a new page, where you’ll find some network tools. I stored some on my usb key and cannot do without… Let’s enjoy !

See you later

BGP regular expressions

Hello,

Here is an article to remain or learn each metacharacter feature in ip as-path command.

. Any single character, including white space.
[] Any character listed between the brackets.
[^] Any character except those listed between the brackets. (The caret is placed before the sequence of literals.)
- (Hyphen) Any character in the range between the two literals separated by the hyphen.
? Zero or one instances of the character or pattern.
* Zero or more instances of the character or pattern.
+ One or more instances of the character or pattern.
^ Start of a line.
$ End of a line.
| Either of the literals separated by the metacharacter.
_ (Underscore) A comma, the beginning of the line, the end of the line, or a space.

Link on Cisco Documentation

HTH

How to list all ACL defined under a particular interface or route-map

Hello,

Here is an IOS tips to find all access-lists applied on an interface or route-map.

R1#sh run | inc ^(interface|route-map) | access-group
interface Dialer 0
ip access-group 102 out
interface FastEthernet0/0
ip access-group 101 in
route-map rm-lan permit 10

HTH

How to use SecureCRT with Dynamips

Hello,

If SecureCRT is your favorite telnet/ssh tool, you can now use it with Dynamips !
Procedure is quite simple and is described below :

- Modify your dynagen.ini file in C:\Program Files\Dynamips and add the following line :
telnet = start C:\progra~1\SecureCRT\SecureCRT.EXE /script c:\progra~1\dynamips\securecrt.vbs /arg %d /T /telnet %h %p & sleep 1

- Write a vbs script and copy it into the same folder as dynagen.ini file. The script filename must be securecrt.vbs
#$Language="VBScript"
#$Interface=”1.0″
Sub main
crt.window.caption = crt.arguments(0)
End Sub

All is ready now, when you issue a “telnet /all” on dynamips console, SecureCRT will run and each router will be displayed in its own tab.

HTH

BGP Lab

Hello,

Following the mpls lab I posted last week, I made the same for Knet BGP lab.
I just set up the dynagen file with ip address and interfaces configuration.
I let you choose the IGP you would like to implement.
I know it will be a cornelian choice between eigrp and ospf
Here is the link to download the archive.

Enjoy !

Physical Topology

Logical Topology

MPLS Lab

Hello,

I’m currently doing Knowledge Net MPLS labs.
I set up my lab on Dynamips and for the moment it runs very well…
You can download the dynagen .net file here.

Enjoy !

White Paper : Cisco Catalyst 3750 Switches

Hello folks,

I found an interesting white paper on Cisco’s website about Stackwise feature on 3750 switches.

Here is the link

Terminal settings on Cisco IOS

Hello,

You have already been blocked while troubleshooting an issue by an infinite traceroute. You did not find which keys to use to stop it ? Here is the solution : In EXEC mode, type terminal escape-character 03
Now you can stop any traceroute or ping at anytime by using Ctrl + C sequence !

If you need further tips, check this page : Link.

See you later !

How to configure SDM with Dynamips

Hello gears,

I installed SDM engine today in order to prepare myself for ISCW test.

I searched the web about howto’s but I never found what I needed. Hope that tutorial can help someone else.

Steps :

• Configure an ip address on a router interface and enable it. This interface must be fast/ethernet type.
  • Ex :
  • Router#conf t
  • Router(config)#ip http secure-server (Some keys should be generated…)
  • Router(config)#interface fastethernet0/0
  • Router(config-int)#ip address 172.16.0.2
  • Router(config-int)#duplex full
  • Router(config-int)#no shut
• Install a loopback adaptater on your pc : You can follow the following article for this Link.
• Run the “Network device list” batch from Dynamips folder and gather the hardware reference for your network adaptater.
• Edit you .net file and add the following statement
  • F0/0 = NIO_gen_eth:DeviceNPF_{ ** your nic reference **}
• Modify the new Windows network connection and assign it a static ip address such as 172.16.0.1/24.
• Run your .net file and try to ping from both sides : Router->PC and PC->Router
• Install SDM engine on your PC. I’m currently using the version 2.4.1. You may need to allow activex, you can trust them.
• Use the ip address you defined on the router and enter it into SDM. 172.16.0.2 in our case.
• You will be prompted for a username and a password. You have to define it into router configuration. Below is an example.
  • Router(config)#usernmame sdm priv 15 password sdmlab

Cheers and Enjoy !