VTP

Question 1

What are the 3 modes of VTP?

Answer 1

Client- 1. Can’t modify, create of delete VLANs. 2. Forwards advertisments. 3. Only sends advertisements at bootup.

Server- Can modify, create of delete VLANs. 2. Originate VTP advertisments. 3. Accepts advertisements from Servers/Clients

Transparent- 1. Can modify, create of delete VLANs. 2. Does NOT advertise anything. 3. Forwards advertisments from other switches (does not look at them)

4. Same as disabling VTP
5. Needed for private VLAN. (can’t do private VLAN and VTP)
6. Needed for extended VLAN 1006-4094

Question 2

What does VTP do?

Answer 2

1. Cisco Proprietary
2. Used to Dynamicly to manage VLANs across multiple switches.

Question 3

How does VTP Work?

Answer 3

1. All Switches must belong to the same domain to exchange info.
2. Server is the default mode.
3. Highest revision # is considered newest DB. (a switch in client mode could update VLAN DB at bootup with higher Revision #)
4. VTP is only advertised over Trunk Ports

Question 4

Describe VTP version 1

Answer 4

1. Supports VLAN 1-1005
2. If a switch with version 1 detects a switch with version 3, the switch with version 1 will try to upgrade itself.

Question 5

Describe VTP version 2

Answer 5

1. supports VLAN 1-1005
2. Consistenty checks when changes are made to VLAN or VTP configuration
3. Transparent VTP switches will forward advertisments via trunk enen if domain name is different

Question 6

Describe VTP version 3

Answer 6

1. Into off mode
2. able to disable VTP at port level
3. Secure Mode

• Hidden (hash, not visable)
• Secret (encrypted)

4. VTP Primary Server Feature
5. Supports VLAN 1-4094
6. Supports Private VLAN

Question 7

What are 2 ways to reset the VTP reversion #?

Answer 7

1. Change Domain Name
2. Change mode to Transparent and back to desirered mode.

Question 8

What are the 3 VTP advertisments types?

Answer 8

1. Summary advertisments
2. Subset advertisments
3. client advertisment request

Question 9

What do VTP summary advertisments contain?

Answer 9

1. Domain
2. Config Revision #
3. MD5
4. Timestamp

Question 10

How often are VTP Summary advertisments sent?

Answer 10

1. Every 5 minutes by VTP Server
2. Everytime a DB change

Question 11

What are VTP subset advertisments?

Answer 11

VLAN Config change

Question 12

When would a VTP client advertisment request be sent?

Answer 12

1. If the client switch VLAN DB comes corrupt
2. If client DB get deleted

Question 13

What is VTP Prunning?

Answer 13

When enabled a switch will not send broadcast, multicast and unicast down a trunk to another switch when it knows there is not a port with that VLAN on it.

Question 14

What is the command to enable VPT Prunning?

Answer 14

(config)#vtp pruning