We help IT Professionals succeed at work.
Get Started

Spanning Tree  + Switching Loops

688 Views
Last Modified: 2012-05-09
Hi,
I am trying to understand bridign loops to get better understanding of spanning tree
Firstly the cisco documentation talks alot about segments to me i take it as a segment is broadcast domain so each vlan is a segment??

So for example say we have 2 vlans spread over couple of switches same user vlans 2 + 3.

Say a pc connected to one of the access ports on 1  of the switches say fa0/3 in vlan 2 on switch2 . When it sends a frame to a pc on vlan 3. Does all the access ports in vlan 2 see the frame or is just fa0/3?? Do all switch access ports see all frames in the same vlan/same segment or is just broadcast frames that all switchports will see.
The way i though it happened was that each switch learns from each source address so say the pc on fa0/3 transmits a frame the switch puts in it cam table the source mac of the pc as reachable though fa0/3


What is confusing is the bridging loops.
the example i have  has    2 segments and 2 switches a pc on 1 segment transmits to a pc on another segment why does both switches on the first segment get the frame and put in there cam table would  switch 2 not just get it as it is on the fa0/3 of the switch ?? see attachement

Figure5-1.gif
Comment
Watch Question
Software Engineer
CERTIFIED EXPERT
Distinguished Expert 2019
Commented:
This problem has been solved!
Unlock 1 Answer and 7 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE