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
Solved

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

Posted on 2013-11-21
4
358 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
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 45

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 Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Line cards, Supervisor, Control plane 7 52
Bandwidth issues? 5 41
Limit traffic to specific Cisco port? 12 52
Solar Winds can't see SQL Server Express 17 30
PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
When you try to share a printer , you may receive one of the following error messages. Error message when you use the Add Printer Wizard to share a printer: Windows could not share your printer. Operation could not be completed (Error 0x000006…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

790 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