Solved

2 ends of trunk - allowed vlan 2-4094 - other end allowed all - will vlan1 pass through trunk

Posted on 2013-11-21
4
373 Views
Last Modified: 2013-11-27
Hi - can someone please explain this. - here are 2 settings for either end of trunk
int2.jpg
int1.jpg
0
Comment
Question by:philb19
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 50

Expert Comment

by:Don Johnston
ID: 39668680
What exactly do you want explained?

Looks like VTP is pruning the VLANs on the trunk at one end of the trunk.
0
 
LVL 3

Accepted Solution

by:
RKnebel512 earned 500 total points
ID: 39669671
No, vlan 1 should not pass through this trunk.  Interface 2 will neither send it out this port nor receive it.  But depending on the way your network is configured, you might want that behavior.

Since the native vlan is vlan 1, the switches put any packets that don't have another place into vlan 1.  

For security purposes, many network administrators run everything on other vlans, then filter out vlan 1.  That way any traffic that they didn't specifically put in one of their own vlans doesn't get sent anywhere.  

But if you aren't using any other vlans, then everything is dumped into vlan 1.  In that case, you definitely want to allow the traffic.

Either way, you should configure the ports so they match, just for simplicity's sake
0
 
LVL 46

Expert Comment

by:Craig Beck
ID: 39671890
In addition to what the other experts have said here, it's fine to have different pruning settings at each end of a trunk link from a technical perspective.  You don't need things to match like you do with an EtherChannel.

The beauty of this (depending on how you look at it) is that you can prune VLANs at one end only if you want to, without having to prune at the other end.
0
 

Author Closing Comment

by:philb19
ID: 39682630
great explanation - Thanks
0

Featured Post

Free NetCrunch network monitor licenses!

Only on Experts-Exchange: Sign-up for a free-trial and we'll send you your permanent license!

Here is what you get: 30 Nodes | Unlimited Sensors | No Time Restrictions | Absolutely FREE!

Act now. This offer ends July 14, 2017.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this article, I am going to show you how to simulate a multi-site Lab environment on a single Hyper-V host. I use this method successfully in my own lab to simulate three fully routed global AD Sites on a Windows 10 Hyper-V host.
Make the most of your online learning experience.
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…
Suggested Courses
Course of the Month10 days, 21 hours left to enroll

628 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question