Switching Technologies Primer

 

Cisco Catalyst 2950 (24 - 10/100 Ethernet) Switch Configuration

 

To reset the Cisco 2950 switch to factory default:

 

1.       Connect a Cisco console cable to the console port on the switch

2.       Power on the switch holding down the mode button until you see the following prompt

 

Using driver version 1 for media type 1

Base ethernet MAC Address: 4c:30:2d:81:ef:80

Xmodem file system is available.

The password-recovery mechanism is enabled.

The system has been interrupted prior to initializing the

flash filesystem. The following commands will initialize

the flash filesystem, and finish loading the operating

system software:

flash_init

†boot

switch:

 

3.       Initialize the flash file system with the command flash_Init

4.       Delete the config.text file by entering Ė del flash:config.text

5.       Delete the vlan.dat file from the flash directory by entering Ė del flash:vlan.dat

6.       Reboot the switch

 

 

To configure the Cisco 2950 switch per our BNUG demo switch plan:

 

1.       Connect a Cisco console cable to the console port on the switch

2.       Power on the switch

3.       When prompted to enter the initial configuration dialog and basic management setup, answer No.† We will configure all required commands via the CLI.† Enter the following commands:

4.       enable

5.       clock set hh:mm:ss day month year (i.e. 13 Nov 2018)

6.       config t

7.       hostname cisco_2950

8.       enable secret secretPW (i.e. BNUGifm!)

9.       Line vty 0 15

a.       password telnetpw (i.e BNUGifm!)

b.      exit

10.   interface vlan 1

a.       ip address 192.168.100.5 255.255.255.0

b.      no shutdown

c.       exit

11.   show VLAN

12.   copy run start

13.   config t

14.   vlan 2

a.       name SAN

15.   vlan 3

a.       name VMotion

b.      exit

16.   int range fa0/1 -7

a.       switchport mode access

b.      switchport access vlan 1

17.   int range fa0/8- 14

a.       switchport mode access

b.      switchport access vlan 2

18.   int range fa0/15-21

a.       switchport mode access

b.      switchport access vlan 3

c.       exit

19.   show vlan

20.   copy run start

21.   config t

22.   int range fa0/22 -24

a.       switchport mode trunk

b.      channel-group 1 mode on

c.       exit

23.   show etherchannel summary

24.   show interface trunk

25.   show vlan

26.   copy run start

 


 

Dell PowerConnect 2748 (48 - 10/100/1000 Ethernet) Switch Configuration

 

To reset the Dell PowerConnect 2748 switch to factory default:

 

1.       With the switch powered on depress the Mode button until the Managed light blinks.† This light will blink for about two minutes and then turn off.

2.       Depress the Mode button again until the Manager light is back on.† Wait two minutes.

3.       Cable the configuration laptopís Ethernet port to any switch port

4.       Set the laptopís IP to be 192.168.2.100/24

5.       Open a browser and connect to http://192.168.2.1

6.       Login as admin with no password

7.       Do not restore configuration.† Just hit Apply Changes.† You will see a message stating that the device will be reset.† Hit OK.

 

To configure the Dell PowerConnect 2748 switch per our BNUG demo switch plan:

 

1.       Under the Switch Status tab enter -

a.       Name: Dell_2748

b.      Date: 13/Nov/18

c.       Time: hh:mm:ss

d.      Apply changes

2.       Under the Local User Database tab, select the admin user and enter a verify a secure password, then Apply

3.       Under the IP addressing tab enter Ė

a.       IP address: 192.168.100.6

b.      Subnet Mask: 255.255.255.0

c.       Default Gateway: 192.168.100.1

d.      Apply changes, then reboot

4.       Change the IP address of the configuration laptop to 192.168.100.100/24, browse to 192.168.100.6 and then relogin as Admin with no password.

5.       Under VLAN Membership, Create the following VLANs

a.       VLAN 1 Default VLAN Ö this should already be there

b.      VLAN 2 SAN

c.       VLAN 3 VMotion

6.       Initially, for VLAN 1 all ports and all LAGs will be listed as U(ntagged).† After we assign other VLANs to ports and set the correct PVID, VLAN1ís port assignments will look like this:

 

7.       Select VLAN 2 and update ports 16-30 to be U(ntagged) and LAG 1 to be T(aged) like this:

 

 

8.       Select VLAN 3 and update ports 16-30 to be U(ntagged) and LAG 1 to be T(aged) like this:

 

 

9.       Go to the VLAN Interface Settings and verify that ports 1 -15 and LAG 1 are set to PVID 1.

 

 

10.   Go to the VLAN Interface Settings and change ports 16 - 30 to PVID 2.† Select Apply after each port change.

 

 

11.   Go to the VLAN Interface Settings and change ports 31 - 45 to PVID 3.† Select Apply after each port change.

 

 

12.   Go to the LAG Membership tab, select LAG 1 and then assign ports 46 -48 as M(embers).

 

 

 

 

 

 


 

Can We Talk?

 

1.       With my PC (192.168.100.100) in port C1 and Adamís PC (192.168.100.200) in port C5, can we talk?

2.       With my PC (192.168.100.100) in port C1 and Adamís PC (192.168.100.200) in port C11, can we talk?

3.       With my PC (192.168.100.100) in port C1 and Adamís PC (192.168.100.200) in port D1, can we talk?

4.       With my PC (192.168.100.100) in port C1 and Adamís PC (192.168.100.200) in port D1, and we remove trunk port D46, can we talk?

5.       With my PC (192.168.100.100) in port C1 and Adamís PC (192.168.100.200) in port D1, and we remove trunk ports D46, D47 and D48, can we talk?

 

Putting all trunk cables back in placeÖ

 

6.       With my PC (192.168.100.100) in port C1 and Adamís PC (172.16.100.200) in port C5, can we talk?

7.       With my PC (172.16.100.100) in port C9 and Adamís PC (172.16.100.200) in port C14, can we talk?

8.       With my PC (172.16.100.100) in port C9 and Adamís PC (172.16.100.200) in port D29, can we talk?

9.       With my PC (10.16.100.100) in port C21 and Adamís PC (172.16.10.200) in port D40, can we talk?

10.   With my PC (10.16.100.100) in port C21 and Adamís PC (10.16.100.200) in port D40, can we talk?

 

>80% wins a prize!

 

Bonus Question

 

A.      The Dell 2748 switch is a 48 x 10/100/1000 mb/s switch.† The Cisco 2950 switch is a 24 x 10/00 mb/s switch.† What is the negotiated speed of the three Dell LACP trunk ports D46, D47 and D48?