?
Solved

NEXUS 5548

Posted on 2014-11-23
5
Medium Priority
?
155 Views
Last Modified: 2014-11-23
How do non Layer 3 devices such as l2 switches deal with MTU issues.
0
Comment
Question by:sectel
[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
  • 3
  • 2
5 Comments
 
LVL 50

Expert Comment

by:Don Johnston
ID: 40461042
You're going to have to provide more information.

The title of "Nexus 5548" gives no information as to what you're looking for.

How do non Layer 3 devices such as l2 switches deal with MTU issues.
What do you mean by "MTU issues"?  For most Layer 2 switches, the default MTU is 1500 bytes. Frames larger than that are discarded.
0
 

Author Comment

by:sectel
ID: 40461063
Today's networks are jumbo capable (9216) ....hence part of a network could be jumbo capable and another portion may only provide 1500 MTU capability.

What happens when a jumbo frame crossed the boundary and egresses a  L2 switch that can only pass packets that are 1500 bytes of smaller.  

The Switch would then have to fragment the packet..  Since l2 switches don't look at the l3 header how does the fragmentation work out.
0
 
LVL 50

Expert Comment

by:Don Johnston
ID: 40461072
If a layer 2 is not configured for jumbo frames, it will just discard any frames larger than 1518 bytes.
0
 

Author Comment

by:sectel
ID: 40461076
So your saying a l2 switch will not fragment....correct?
0
 
LVL 50

Accepted Solution

by:
Don Johnston earned 2000 total points
ID: 40461080
Correct.
0

Featured Post

Simple, centralized multimedia control

Watch and learn to see how ATEN provided an easy and effective way for three jointly-owned pubs to control the 60 televisions located across their three venues utilizing the ATEN Control System, Modular Matrix Switch and HDBaseT extenders.

Question has a verified solution.

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

I see many questions here on Experts Exchange regarding switch port configurations and trunks. This article is meant for beginners in the subject to help to get basic knowledge about Virtual Local Area Network (VLAN (http://en.wikipedia.org/wiki/Vir…
Arrow Electronics was searching for a KVM  (Keyboard/Video/Mouse) switch that could display on one single monitor the current status of all units being tested on the rack.
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…

764 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