?
Solved

Why Cisco VOIP's link lights solid amber when connected, compared to computers blinking green?

Posted on 2008-06-18
2
Medium Priority
?
1,066 Views
Last Modified: 2008-07-22
We have several Cisco VOIP's ranging from 7940's-7971's. When we connect them to our switches, which range from Cisco 2950-3750,  the phone's link lights solid amber and the computers blink green. Is there any reason as to why the VOIP phones are able to work but the ports show up as amber. Also checked out the port configuration, they are all running Fast Ethernet, 100mbps, etc. We have a flat network here where every switch is daisy chained to each other. I was wondering if they show up amber because of how slow the network is going, QOS, or something else. Has anyone else seen this issue? Thanks.
0
Comment
Question by:Majestica
  • 2
2 Comments
 
LVL 32

Accepted Solution

by:
harbor235 earned 2000 total points
ID: 21821838

When you first attached a device to a switch port spanning tree will take the port through all the spanning tree states to intergrate that port with a vlan. If you want to reduce the time it takes to become active you can use the port-fast feature with identifies this port as a host port not requiring the full spanning tree state transitions.

Amber means the spanning tree is evaluating the port running through the five states for vlan intergration, essentially it ensures that a loop is not being introduced into the spanning tree topology.

spanning tree five states;
blocking
listening
learning
forwarding
disabled


harbor235 ;}

0
 
LVL 32

Assisted Solution

by:harbor235
harbor235 earned 2000 total points
ID: 21821854

You should have your switches configured like this with minimal daisy chaining

                                           sw1
                                        /    |     \
                                   sw2    |   sw3
                                             |
                                          sw4

You should follow this architecture where possible, you do not want to many layer 2 hops in your network.

harbor235 ;}
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

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…
I eventually solved a perplexing problem setting up telnet for a new switch.  I installed a new Cisco WS-03560X-24P switch connected to an existing Cisco 4506 running a WS-X4013-10GE Sup II-Plus. After configuring vlans and trunking,  I could no…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an anti-spam), the admin…
Stellar Phoenix SQL Database Repair software easily fixes the suspect mode issue of SQL Server database. It is a simple process to bring the database from suspect mode to normal mode. Check out the video and fix the SQL database suspect mode problem.
Suggested Courses
Course of the Month7 days, 21 hours left to enroll

616 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