VTP Model 3 Information – IP With Ease

As applied sciences are enhancing and wish for improved variations of protocols turns into crucial, Cisco and different business distributors maintain full-throttle on creating new enhancements within the present merchandise and community companies.

One such case is of VTP the place community directors face the important thing problem to reduce errors and have scalability in options.

Two key duties are – modification of the VLAN configuration and the MST (A number of Spanning Tree) environments which require the constant modification of a gaggle of units.

Associated – Cisco vs HP Vlan Configuration

Cisco Methods gives a novel and confirmed instrument to optimise such duties; VTP model 3 eases and secures the administration and the deployment within the area.

VTP Model 3 Rationalization –

The principle objective of VTP model 3 stays to synchronize VLANs however it has a quantity for extras. It’s been round for some time however till current IOS variations, it wasn’t supported on Cisco Catalyst Switches.

VTP model 3 is the third model of the VLAN trunk protocol and enhances its preliminary capabilities effectively past the dealing with of VLAN issues.

VTP v3 interoperates with VTP model 2 however not VTP model 1. For units which can be able to working VTP model 2 however are working in VTP model 1 mode, a change to VTP model 2 is required.

Associated – VTP Mode and Model Comparability

Earlier than contemplating VTP model 3 to your community it’s endorsed that you simply confirm if all switches within the current or potential VTP area are able to working in VTP model 2 mode.

One of the best outcomes shall be achieved in a homogeneous VTP model 3 setting.

VTP model 3 helps beneath given options that aren’t supported in model 1 or model 2:

1. Non-public VLAN help.
2. A number of Spanning Tree (MST) Help – VTP model 3 can propagate A number of Spanning Tree (MST) protocol database data.
3. VTP main server and VTP secondary servers.
4. Help to show VTP on or off on a per-trunk (per-port) foundation.
5. Help for prolonged vary VLAN (VLANs 1006 to 4094) which was initially upto 1005 till Model 2 of VTP.
6. Enhanced authentication the place Authentication will be configured as hidden or secret.
7. RSPAN VLANs: distant SPAN VLANs can now be synchronized
8. VTP will be disabled globally.
9. Safety from unintended database overrides throughout insertion of latest switches – VTP mode shoppers, and secondary servers can not write the VLAN database. There can solely be one main server. The first server is the one server allowed to put in writing the VLAN database.
10. In VTP model 3, VLAN configurations are saved in NVRAM in shopper mode. Earlier model didn’t save VLAN configurations in NVRAM

VTP Model 3 Operation –

VTP model 3 makes use of the mannequin of machine roles. Along with the three roles utilized in model 1 and a pair of i.e. “shopper”, “server”, and “clear” position, there’s one other fourth position which has been launched – It’s referred to as “off” position.

This position is sure to the occasion or mode for VTP model 3 operations. (The occasion right here will be VLAN or MST). Let’s element on the 4 roles in VTP model 3 –

Clear: On this position, the change makes use of NVRAM to retailer the domestically created configuration of an occasion of VLAN database.

VTP clear switches don’t take part in VTP nevertheless do ahead VTP ads that they obtain from different switches via their trunk interfaces.

VTP messages are neither despatched nor evaluated when acquired. The native configuration revision quantity will all the time be 0 in clear mode/position. Area test will not be applied not like throughout version1 the place it was carried out.

Shopper: A tool utilizing native momentary cupboard space to carry by way of VTP acquired data. This data is used to replace different units, equivalent to a tool that’s working as a server.

Native configuration of units within the shopper position will not be attainable i.e. we can not create, change, or delete VLANs on a VTP shopper. After booting, a shopper machine points a VTP message asking for the configuration of different VTP units.

VLANs are configured on one other change within the area that’s in server mode.

Off: Launched with CAT OS 7.X, a mode much like clear was supplied. The distinction between clear and off is the termination of acquired VTP messages as a substitute of relaying them. With VTP model 3, off mode will be configured globally or on a per-port base. The off mode was previously solely obtainable with CAT OS. The configuration of off on an interface will apply to all VTP cases. Turning VTP to off permits a VTP area to hook up with switches in a unique administrative area. In a world configuration, the off key phrase applies to the desired or default occasion.

Server: In VTP server mode, you possibly can create, modify, and delete VLANs, and specify different configuration parameters (such because the VTP model) for the whole VTP area. VTP servers promote their VLAN configurations to different switches in the identical VTP area and synchronize their VLAN configurations with different switches based mostly on ads acquired over trunk hyperlinks. VTP v3 expands and enhances the idea of the server position. Just one server per area will be prompted to be a main server. Shopper and secondary server units obtain a configuration from a main server. A secondary server shops the acquired configuration in an area everlasting cupboard space (for instance, NVRAM) and updates different units in the identical area and for a similar occasion.

Associated- VTP Pruning

Beneath is a pattern case the place we configure change (SW1) in model 3 of server mode as beneath:

v3 can’t be enabled with out specifying a website. Earlier variations of VTP took the area title from its neighbors if one will not be specified.

Now we’ll make SW1 as main server. There can solely be one main server. The first server is the one server allowed to put in writing the VLAN database: