Wednesday, May 29, 2013

GNS As Network Interview Tool - Test 1 (Layer-2)

Recently I was interviewing lots of people for a Level-2 Engineer profile. The requirement  was for one of my Enterprise client NOC. The client simply asked me to ensure only quality Engineers get through this. So I decided to change my regular interview pattern this time. I designed a Series of hands on test for this purpose. So here is the Test-1. Though I wrote this for level-2 Engineers to ensure even a rusty CCNP Engineer can qualify this but even I expect a Good CCNA Engineer to pass this easily.




Guidelines
ü  All VLANs are preconfigured.
ü  All passwords are preconfigured.
ü  Verify VLAN database using “ sh vlan-switch brief “ command.
ü  Don’t configure any local user account.
ü  Don’t change default console settings.
ü  Use dummy username “abc” for ssh testing.
ü  There are some configuration faults which you may need to find and fix.
ü  Don’t reload the device without checking with Interviewer.
ü  The given time for test is 35 Mins.
Tasks

Ø  1. Configure all inter switch links as 802.1Q Trunks.
Ø  2. Make sure SW-1 is Root Bridge for VLAN 10 , SW-2 is Root Bridge for VLAN 20 , SW-3 is Root Bridge for VLAN 30
Ø  3. Confi gure the inter switch links between R1 & R2 , R1 & R3 so that none of the link is in spanning tree block state.
Ø  4. Make sure all switches are able to telnet each other. Use password as " cisco " whenever required. Management IPs are as Followed:
SW-1 > 1.1.1.1/24
SW-2 > 1.1.1.2/24
SW-3 > 1.1.1.3/24
Ø  5. Configure SW-1 so that it allows SSH connection for management in INBOUND direction. Make sure when you SSH from SW-2/SW-3, you are able to get SSH login Prompt.
 Example:

 

Ø  6. Enable SNMP environmental monitor traps on SW-2 to ensure traps are generated for High Temperature & Fan failures for example. The traps should be sent out to NMS Address “1.1.1.250”. Use community value as “ cisco “ if required.
Ø  7. Create a SPAN (AKA Port Mirroring) session with source interface as Fa1/5 on SW3. The SPAN Destination is Fa1/6

GNS Initials & Topology - http://www.4shared.com/rar/Zhou26u3/L2_Section.html

HTH...
Deepak Arora
Evil CCIE

6 comments:

Praveen said...

can we expect few more task like this

Krishna said...

Deepak,

I downloaded the topology file.

Can you please tell me how to open it up in GNS3?

How switching will work in GNS3.

Krishna

Anonymous said...

Appreciate this post. Let me try it out.

Check out my blog

Unknown said...

Hi Deepak

To meet with task no -3, i configured ehter-channel between R1 & R2. With this, all links will not be in block state. However not able to ping vlan1 IPs configured on R1 & R2 from R3.

Regards
Jagz.

Unknown said...

Hi Deepak

To accomplish task 3 - Confi gure the inter switch links between R1 & R2 , R1 & R3 so that none of the link is in spanning tree block state.

Configured ehter-channel between R1 & R2 to make all links not to be in block state. However not able to ping R1 & R2 vice versa. From R3, able to ping R2.


Regards
Jagz

Unknown said...

Hi Deepak

To accomplish task 3- Confi gure the inter switch links between R1 & R2 , R1 & R3 so that none of the link is in spanning tree block state.

Configured Ether-channel between R1 & R2, R1 & R3. However not able to ping R1 to R2 vice versa. Able to ping from R3 to R2 where ether-channel was not configured.

Regards
Jags