BladeSystem Virtual Connect
cancel
Showing results for 
Search instead for 
Did you mean: 

Understanding VLAN Trunking Protocol and VirtualConnect

 
chuckk281
Trusted Contributor

Understanding VLAN Trunking Protocol and VirtualConnect

Scott needed some clarification around VLAN Trunking Protocol(VTP):

 

*******************************************************************************************************************

I understand we don’t support Cisco’s proprietary VTP and I have to admit I don’t fully understand it and it a bit over my head but a customer has asked;

 

If a VTP domain is presented to a VC uplink port (a number of Trunked VLAN’s) can the VC see the VLANS if individually added to the port profile in VC?

 

When VTP domains have similar VLAN’s, i.e VTP #1 has VLAN1 and VTD #2 has a VLAN1 can these VLANS be isolated between servers, or assigned to different servers? Or is this question completely irrelevant?

 

Maybe I need to ask how somebody using VTP domains connects to VC?

 

Thanks in advance and sorry if this is a dumb question.

****************************************************************************************************************

 

But to Paul there are no dumb questions:

 

************************************************************************************************************

So, from Cisco defining VTP

http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52.shtml

 

VLAN Trunk Protocol (VTP) reduces administration in a switched network. When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain. This reduces the need to configure the same VLAN everywhere. VTP is a Cisco-proprietary protocol that is available on most of the Cisco Catalyst series products.

 

So, VTP does nothing but propogate the VLAN config throughout the Cisco environment.  The fact that a VLAN was created on a switch via VTP doesn’t change how the VLAN works, nothing special about it.

Within a layer 2 network ( a collision domain, everything on the same side of a router), VLANx =VLANx=VLANx.

***********************************************************************************************************************

 

Hopes this helps. Do you use VTP from Cisco?