Archive for July 2015

Configure Terminal Server

Configure Terminal Server

1. Configure an IP address on the ethernet interface
cisco(config)# int fa0/0
cisco(config-if)# ip add
cisco(config-if)# no shut

2. Create a loopback interface
cisco(config)# int lo0
cisco(config-if)# ip add

3. Configure the line based on the “show line” output. 
* If enabled, the port will be accessible through the network on TCP port 20xx where xx is the TTY of the port on the router
cisco(config)# line 1 16
cisco(config-line)# no exec  //unwanted signals from the attached device do not launch.
cisco(config-line)# exec-timeout 0 0 //disable the line timeout period
cisco(config-line)# logging synchronous
cisco(config-line)# transport input all 

4. Configure default route
cisco(config)# ip route
cisco(config)# ip default-gateway  
// ip default-gateway is configured as well in case routing is not enabled. E.g. the terminal server is in ROMMON mode as a result of a bad reboot after power outage.

5. Enable telnet line
cisco(config)# line vty 0 4
cisco(config-line)# password cisco
cisco(config-line)# login

6. Configure host and line mapping
*e.g. Router A is connected to line 1
cisco(config)# ip host RouterA 2001

Thursday, 2 July 2015
Posted by Christina Evangeline

How to use VPCS with GNS3 in Ubuntu

How to use VPCS with GNS3 in Ubuntu

1.Download vpcs from here VPCS 0.20a

2.Extract and look for vpcs32.linux(for 32-bit systems) and vpcs64.linux (for 64-bit systems)

3.Fire up the Terminal and issue following command 
chmod +x vpcs32.linux

4.Then we'll open and configure startup.vpc in gedit 

gedit startup.vpc 

5.Now configure startup.vpc according to your requirement. For example I'll add just two hosts for this tutorial.
Host 1 (VPCS1) with Ip and as its gateway.
Host 2 (VPCS2) with Ip and as its gateway.

** add # to the rest of the lines.

6.Now lets start VPCS by issuing the following command within the terminal.

7.Use show command to see all the configured ip addresses.

8. We are done with VPCS configuration part, minimize the vpcs window, and lets configure port settings for VPCS on GNS3.

Fire up GNS3 (run gns3 as a root).

9.This is a optional step where I'll be adding symbols to PC hosts.

10.Add computer symbol from 'available symbol' to 'customized nodes'
    on name = anyname ie, PC1
    on type  = Cloud
    click ok
Do the same for PC2

11.Drag and Drop PC1 and PC2 into the GNS3 Workboard.
    Double click on PC1
    click on 'C1'
    go to tab 'NIO UDP'
    go back to Step 7
    Check the LPORT and RPORT

12.On Local port add rport value
    on Remote port add lport value
    on Remote host add
    click add
    Do the same for PC2 (again check the respective ports)

13. Lets add a Ethernet switch to the GNS3 workboard and check the connectivity between the two hosts.

14. Maximize vpcs window and lets ping to each host to check the connectivity between them.
     To navigate from 1 pc to another, simply type the number

As you see, a successful connectivity has been established between the two hosts.  

Wednesday, 1 July 2015
Posted by Christina Evangeline

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