Here are my flash cards for 2.1.d Implement and troubleshoot Trunking. I am giving these flash cards in TXT and in an ANKI package.
If you don’t have or know what Anki is, it is my favorite , free flash card program:
Here is the Anki package you may import and start using the flash cards right away:
What does VTP stand for? vlan trunking protocol
Regarding VTP, what is true about the domain name in V1-2 and V3?
Switches automatically learn the domain name as long as they have an active trunk formed between them (static or DTP).
What types of ports does VTP require its messages to go across?
VTP requires either static trunks (.1q or ISL) or DTP negotiated trunks
What is true about the VTP password for all switches in 1 VTP domain?
It must be the same for the domain
What show command will display version, domain, operating status and other VTP info?
show vtp status
What other L2 Encapsulation does VTP support besides ethernet?
Token ring, since VTP version 2
Regarding normal, reserved, and extended VLANs, what did VTPv3 introduce?
VTPv3 introduced support for the extended vlan range.
Which versions of VTP support private VLANs?
Only VTP V3
Which versions of VTP allow us to turn it off PER PORT? How about turning it back on? Do it for port g0/1.
Only in V3
What is true about the VTP password and protecting it in all versions of VTP?
The VTP password will not show up in the running config.
How do we show the VTP password?
show vtp password
What hashing algorithm is used to send the VTP password?
In VTP v1 and 2 can we have multiple VTP servers?
Yes we can have multiple VTP servers by default switches are VTP servers but they can be changed to client.
What is a VTP client not allowed to do? Add or delete vlans
What special command must be run on the server to become the master for VTP v3, in exec or global config?
In exec mode you must run
With VTP v3, what 3 other features do we have available for the password? Give examples..
We have the options for:
The above shows the password as an MD5 hash using “show vtp password”
Are VTP messages encapsulated as 802.3 Ethernet or Ethernet II?
“Configure the 3 switches in the VTP domain of “test” with a password of “mypassword”, use VTP version 3, with a primary server of SW2.
Configure the 3 switches in the VTP domain of “test” with a password of “mypassword”, use VTP version 2
What is the VTP MD5 digest for?
The VTP MD5 digest is a digest of the password and of the VTP config.
What is the VTP configuration revision?
What issues can arise when the client revision is higher than the server when joining a VTP domain? How do you fix it?
What issue can arise if a server joins a domain with a higher revision number (in VTP v1-2)
The VTP configuration revision number is the number of times VTP has changed its config.
If the client’s revision number exceeds the server it will not properly join the domain. The only fix for this is to raise the revision on the server by changing the config.
If a server joins the domain with a higher revision then he will wipe out the vlan database.
What are the 4 VTP modes possible?
In VTPv3, how do you configure a switch as secondary? What is its purpose?
“In VTP we have client and server modes. In VTPv3 we have added the “”vtp primary”” config in exec mode which designates the primary server. Only this server may make changes to the VTP database, no other switch can, no matter their vtp mode. There may only be one active primary.”
In VTP, what command will show all VTP devices participating in the database?
show vtp devices
“In the following network, configure VTP v3, with SW2 being the primary server, and SW1 and 3 being clients. Configure a domain name of test, with a password of mypassword
Finally configure MST propagation via VTP from SW2, show how to verify it, then set SW1 and 3 to use MST.
How do devices running in VTP transparent mode operate?
In the following topology, configure SW1 (server) and SW3 (client) in a VTP domain of test, with a password of mypassword, with VTP version 2. Configure SW2 such that it only passes these messages and does not participate in VTP.
How do we enable VTP pruning? How do we verify it? What is its behavior in V1-2 vs V3?
What 2 ways can we verify which vlans are pruned via VTP from a trunk? Check trunk g0/1
“show interface <int> pruning
Are any extra trunk configurations required for VTP pruning or will it just work as long as VTP messages can pass?
“No extra trunk configurations necessary, a trunk may be “”allowed vlan all”” it may also be DTP negotiated or static.”
How do we prevent vlan 5 from being pruned for the Trunk int g0/1? How do we verify it? How does VTP accomplish it?
In VTP, what is a advertisement request message for ?
It is a message by clients to the servers requesting VTP information (they might have received a summary or seen a different revision number)
In VTP, what is a summary advertisement?
This advertisement happens every 5 minutes, every switch sends out their VTP domain with revision number, this message contains no VLAN info.
In VTP, what is a subset advertisement?
This advertisement contains all of the VLAN info for other switches.
In VTP, what is a join ?
This message is utilized if we have VTP pruning enabled, the join message is used to tell upstream switches to allow the joined vlan on their trunk. These go out every 6 minutes.
What is true about VTP pruning and the extended vlan range?
The extended VLAN is not eligible for VTP pruning
Is VTP pruning enabled by default?
No it is not
What is true about VTP compatability in V1-3?
V1 and 2 are compatible, v2 and 3 are compatible, v1 and 3 are NOT compatible
What command allows us to add vlan 5 to the trunk g0/1?
switchport trunk allowed vlan add 5
What command allows us to delete vlan 10 from the trunk g0/1?
switchport trunk allowed vlan remove 10
By default which vlans are allowed on a trunk?
What command will verify which vlans are manually pruned from a trunk?
show interface trunk
What global config command will tag the native vlan on all trunks?
vlan dot1q tag native
What two features detect native VLAN mismatches?
CDP and PVST+
What command allows us to change the vlan encapsulation to ISL, how about 802.1q?
Do it for G0/1 switchport trunk encapsulation isl
When in VTP mode client what will happen if you create a vlan by configuring the port in that vlan?
If you create a vlan via assigning a port to it, the switch will accept the commands with no warning, however it will NOT actually work because of being in VTP mode client.
What command will display general info about DTP and the DTP timers?
How do you get the DTP information for an interface ? Do it for g0/1
show dtp int g0/1
How can we change the native vlan on the trunk (int g0/1) to vlan 2?
switchport trunk native vlan 2