Configuring VTP on Cisco 3550 !

Nishesh.Prasad

*** SCENARIO ***

I am currently using BOSON NetSim 7.0 and simulating a 3550 switch. I have two 3550s connected to each other as following :
Switch_01 via FastEthernet 0/2 to Switch_02 on FastEthernet 0/2.
(As per my knowledge, ALL the ports by default are assigned to VLAN 1 in a Cisco Switch)

So i start the Switch_01 and enter the INterface VLAN 1 Config mode. I assign the following IP : 192.168.1.10 /24. Thereafter, i enable VLAN 1.
If i run the 'Show IP Interface Brief' command, VLAN 1 comes up with the IP Address, Line Protocol is UP. Same goes for the Line Protocol for

ALL other interfaces - State is Changed to UP. (Everything is fine uptil now).

Next, i start the Switch_02 and enter the INterface VLAN 1 Config mode. I assign the following IP : 192.168.1.11 /24. Next, i enable VLAN 1. The

'Show IP Interface Brief' command yields the same results as Switch_01. (Everything is fine uptil now)

Now in order to replicate VLAN traffic between the 2 switches, i need to hardcode port Fa0/2 on both switches to TRUNK mode. So under both

Switch_01 and Switch_02, i enter the INterface Fa0/2 Config mode and run the following:

(config)#Switchport trunk encapsulation dot1q
(config)#Switchport mode trunk
(config)#No Shutdown

Next i hardcode all the remaining ports under both the switches to 'ACCESS' mode using 'Interface Range'.
FYI : Both the switches are by default under the same VTP Domain (in Boson) and are functioning under SERVER mode.

*** QUERIES ***

1. If i run a 'Show Vlan' command via the Priviledge mode, all the Ports, including Fa0/2 comes under VLAN 1. After i have configured Fa 0/2 to

'TRUNK', why is it still coming under VLAN 1 ? Should'nt it be excluded from the list ?

2. Under Switch_01, if i create VLAN 10, it gets replicated over to Switch_02 which i can see under show Vlan ( under Switch_02). Back to

Switch_01, if i run a SHOW VTP STATUS, the revision number is still the same and the Local Updater ID is 0.0.0.0 (no valid interface found).

Should'nt the Local Updater ID be 192.168.10.1 (VLAN 1) ? Why is the Revision Number not Incrementing ? The results are exactly the same on

Switch_02 as well. (I have'nt Assigned the Ports yet to the VLANs but that has nothing to do with VTP Replication) .

PLEASE HELP !

Nishesh.Prasad

ANYONE ??????????? : : :

remyforbes777

What type of cable is connecting the switches?

Nishesh.Prasad

Its a Simulator !

IT Man

If you apply the "show vtp interface" command, does it show the 2 ports that you configured as trunk?

remyforbes777

So what you are telling me is that you can't simulate the connections? I use Packet Tracer and I can pick the connections. I can choose straight through, cross over, serial DCE or DTE links, fiber etc.

Nishesh.Prasad

ITMan : I'll check the show VTP Interface and come back with the results.

remyforbes777: My question is with regards to VTP (Updater ID & Revision Number). This has got Nothing to do with Physical Connections coz it's a 'Simulator'. They are all fine.

Nishesh.Prasad

SAD NEWS : The Two ports come listed as 'TRUNKING' when i use the Show Interface Trunk or Show VTP Interface command.

Basically, the ports should'nt list themselves under VLAN 1 once they are configured as 'Trunk' ports, which, by the way, is not happening as i have mentioned before. I dont know what exactly is wrong, but i have been breaking my head over it for two days. CURSE YOU BOSON !

i have'nt got any answers here yet from anybody !! i think i'll just skip it ... its been a horrific day so far.

astorrs

Nishesh.Prasad wrote:

Its a Simulator !

Umm... did you consider that's the problem, maybe it's just a bug.

Nishesh.Prasad

i seriously hope it is. m not aware of any means by which i could verify that.