Today I started on my switching lab.  The lab was written for two 2950 switches, however I have a 2971XL switch with an IOS that is a little older than on the lab.  I was able to do just about everything in the lab, however some changes were needed in the commands to get things to work correctly.  I actually liked it this way as I had to work harder at making it happen and seeing how it all came together.  I’ll more than likely get a 2950 switch pair as well so I can try it out on those as well.

The first issue I ran into was after setting up VTP.  I joined both switches to the vtp domain CCNA and gave them the password CISCO, set both to pruning.  I change switch  2 to client mode and left switch 1 on server mode.  I then setup vlan 23, which had to be done differently on my switch.  The lab calls for doing it in conf t.  Instead I had to go into vlan database and set up my vlans there.  After creating my vlan 23 on the server switch I noticed that vlan 23 wasn’t showing up on the client side.  Turns out that trunking isn’t setup by default on this IOS.  No problem, I just had to do some research and configured trunking manually.  I ended up using:

en
conf t
int fa0/21
switchport trunk encapsulation dot1q
switchport mode trunk

I did this also for fa0/22, fa0/23, and fa0/24 (I had four crossover cables so I figured why not).  Once I did that vlan 23 showed up on the client side, and the two routers I put into the vlan were able to ping themselves.

The last item I worked on was setting up an etherchannel on my trunk ports.  Normally you would use channel-group 1 mode on, however no such command existed for me.  So did more digging around on cisco and and looking in IOS help and I found that I could just type:

en
conf t
int fa0/21
port group 1

I did this for all four ports on both switch one and two.  After I did that they showed as one port set for forwarding with a sh spanning vlan 23 command.  Next I’m going to be working on a Frame Relay lab.  I’m going to wait a few days and go over my training material on switching as I’m waiting for another DCE/DTE cable that I’ll need for my labs.  This will be a direct serial connection between router 1 and 2, which bypasses the frame relay cloud I have setup.

Leave a Reply

Your email address will not be published. Required fields are marked *

ten + 14 =