VTP - What am I doing wrong?

I am working in packet tracer, and I suspect that is my problem. Is there something wrong with my VTP configurations, it is practically default!

Solved:

Turns out it was because it was default. You need at least a domain for VTP packets to be sent. Apparently NULL and NULL don't match each other.

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Comments

JaCkNiFe

You need to set a case sensitive VTP domain name on both routers, immediately after that VTP messages will be sent out and you should be in business.

Monkerz

Set a VTP domain name

ConstantlyLearning

I'm gonna go with domain name.

Heero

ConstantlyLearning wrote: »

I'm gonna go with domain name.

Basic troubleshooting of VTP. Check domain name, check version number, check to see if revision numbers match, check for password.

no domain name = no communication, as indicated by the differing revision numbers.

rogue2shadow

I agree with the rest. Don't forget to use show vtp password to verify the passwords on each switch.

wbosher

As well as checking you config as mentioned above, I have found that occasionally PT misbehaves.

I had an issues with VTP where for some reason one of my three switches weren't getting the lastest VLAN data. My config was ok, all trunks were working, really had me scratching my head. I closed down PT and restarted it and it worked fine!

That's the problem with simulators, sometimes you just don't know if it's an error with your config, or a bug in the sim. It's pretty rare, but just something to look out for.

phantasm

They're both configured as a server. Change one to client mode.

networker050184

phantasm wrote: »

They're both configured as a server. Change one to client mode.

Theres nothing technically wrong with having them both as a server. It will still function correctly.

ConstantlyLearning

networker050184 wrote: »

Theres nothing technically wrong with having them both as a server. It will still function correctly.

Yeah, another thing people seem to get hung up on is thinking that a client can't update a server even if it has a high revision number.

thehourman

Yep, you need to configure the vtp domain on both routers. If I remember it right the other router will learn the vtp domain name automatically, and that is when the vtp password comes into play. The password on both routers got to be the same for them to share their vtp update.

chmorin

Well, it was the domain. Forgive my logic, but I figured since they were both by default NULL they would match.

Well, I'm embarrased now. I was doing some crazy configs before in PT with a bunch of etherchannels and VTP and STP, but I could never get VTP to work even with a domain and password set.

So I decided to take it to its most basic form and see if I could get VTP to work in it. So I left everything to defaults and assumed it would work. Oh well. I had never configured VTP without a domain in a lab till now... haha I assumed it would work by default.

thehourman

chmorin wrote: »

Well, it was the domain. Forgive my logic, but I figured since they were both by default NULL they would match.

Well, I'm embarrased now. I was doing some crazy configs before in PT with a bunch of etherchannels and VTP and STP, but I could never get VTP to work even with a domain and password set.

So I decided to take it to its most basic form and see if I could get VTP to work in it. So I left everything to defaults and assumed it would work. Oh well. I had never configured VTP without a domain in a lab till now... haha I assumed it would work by default.

Off-topic
How is the CCNA:Voice? Is it really hard?

chmorin

thehourman wrote: »

Off-topic
How is the CCNA:Voice? Is it really hard?

I enjoyed the subject manor much more than the CCNA, so I found it fun. It was fun learning about everything from how phones used to ring, to making them ring in my room! The codecs and the processes were really interesting to me too. It is certainly different than the CCNA side of things.

Would I say it is hard? No. It is easier than the CCNA IMO.