Does Cisco recommend VTP?
Does Cisco recommend VTP?
Cisco recommends placing VTP version 1 and 2 switches at the edge of the network because they do not forward VTP version 3 advertisements.
What are the 3 VTP modes?
VTP modes – There are 3 modes:
- Server – The switches are set to this mode by default.
- Client – In this mode, the switches receives the updates and can also forward the updates to other switches(which are in same VTP domain).
- Transparent – This mode only forwards the VTP summary advertisements through trunk link.
What is a best practice for VLAN design?
A recommended best practice is to change the Native VLAN to another unused VLAN where no hosts or other devices reside. This is done in order to avoid VLAN hopping attacks such as double-tagging. It’s easy to confuse the ideas of the Native VLAN and the Default VLAN.
Is VTP a security risk?
It might sound useful but VTP has a big security risk…the problem with VTP is that a VTP server is also a VTP Client and any VTP client will synchronize itself with the highest revision number.
What is Cisco VTP?
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks (VLAN) on the whole local area network. To do this, VTP carries VLAN information to all the switches in a VTP domain.
What is VLAN pruning?
VLAN Trunking Protocol (VTP) pruning is a feature in Cisco switches, which stops VLAN update information traffic from being sent down trunk links if the updates are not needed. If the VLAN traffic is needed later, VLAN Trunking Protocol (VTP) will dynamically add the VLAN back to the trunk link.
Should I disable VLAN 1?
Not use VLAN 1 for inband management traffic and pick a different, specially dedicated VLAN that keeps management traffic separate from user data and protocol traffic. Prune VLAN 1 from all the trunks and from all the access ports that don’t require it (including not connected and shutdown ports).
Why should you not use VLAN 1?
The advice is always to not use VLAN 1, so if an attacker or unwanted client connects and ends up on VLAN 1 and there is nothing configured on this VLAN, such as a useable gateway, they are pretty much stuck and can’t go anywhere, while you native VLAN is something like VLAN 900 which is less likely to have any port …
How does Cisco VTP work?
VTP (VLAN Trunking Protocol) is a Cisco proprietary protocol used by Cisco switches to exchange VLAN information. With VTP, you can synchronize VLAN information (such as VLAN ID or VLAN name) with switches inside the same VTP domain.
What is the primary benefit of Cisco VTP?
The primary benefit of VTP is that in large environments it facilitates adding and deleting VLANs, as well as making changes to VLAN configurations.
What is the use of VTP protocol?
VTP is a Layer 2 protocol that maintains VLAN configuration consistency by managing the additions, deletions, and name changes of VLANs across networks, as shown in Figure 3-15. Switches transmit VTP messages only on 802.1Q or ISL trunks.
What is VTP Domain in Cisco switch?
A VTP domain, which is also called a VLAN management domain, consists of one or more trunk-connected switches that have the same VTP domain name. VTP allows users to make VLAN configuration changes centrally on one or more switches, which are then communicated to all the other switches in the VTP domain.
What are the advantages of VTP over VLAN?
With VTP, you can make configuration changes centrally on one or more switches and have those changes automatically communicated to all the other switches in the network, and put into effect on all switches in the VTP domain. None, but note that Private VLANs are only be supported in VTP transparent or off modes.
Which version of VTP should I use with my Catalyst switch?
Cisco Catalyst switches support three different versions of VTP: 1, 2, and 3. It is important to decide which version to use because they are not interoperable. In addition, Cisco recommends running only one VTP version for network stability.