Solved

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

Posted on 2013-11-21
4
345 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

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

If your business is like most, chances are you still need to maintain a fax infrastructure for your staff. It’s hard to believe that a communication technology that was thriving in the mid-80s could still be an essential part of your team’s modern I…
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.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

707 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

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now