Solved

VOIP Phone -- Daisy Chaining Fails ?

Posted on 2015-02-24
3
604 Views
Last Modified: 2015-03-10
Any ideas on how to fix below "Test #1" ?
----------------------------------------------
Details
  ** phone and computer both get
     assigned 192.168.28.x IPs
  ** using my Cisco Catalyst 2550
     managed switch works fine for all
     3 of the below tests for 10+ days
  ** using my Cisco Catalyst 3560G
     managed switch makes below
     "Test #1" fail, even when it looks
     like PORT is programmed for "AUTO"
     everything and not on a weird VLAN
  ** factory resetting the phone, using
     a different phone, using external
     power supply, changing computer and
     phone to a static IP, etc do nothing
     to solve the issue
----------------------------------------------
Test #1 = phone works, computer fails
 1. from Cisco switch port
 2. to Yealink DHCP-based IP phone
 3. to Desktop DHCP-based IP computer
----------------------------------------------
Test #2 = phone works
 1. from Cisco switch port
 2. to Yealink DHCP-based IP phone
----------------------------------------------
Test #3 = computer works
 1. from Cisco switch port
 2. to Desktop DHCP-based IP computer
0
Comment
Question by:finance_teacher
[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
  • 2
3 Comments
 
LVL 35

Accepted Solution

by:
Kimputer earned 500 total points
ID: 40628137
Which Yealink phone type is it exactly? Check PC port config of the phone. Have either VLAN functions off, or if you see anything about port mode, set it to Bridge
0
 

Author Comment

by:finance_teacher
ID: 40628170
Yealink T28P, already set to Bridge mode, phone works fine with COMPUTER if I plug it into Cisco Catalyst 2550, but only works as STAND-ALONE when plugged into Cisco Catalyst 3560G, both Cisco's seem to have NO weird VLAN settings.

Any ideas like "Cisco Catalyst 3560G" has something build-in for security that says "Allow Daisy Chain = NO" ?
0
 
LVL 35

Assisted Solution

by:Kimputer
Kimputer earned 500 total points
ID: 40628195
Oh I see now you have 2 Cisco switches of which only one works as expected. I missed that point. There should be no built-in security like this behavior as far as I know. But having more experienced Cisco experts look at this is better. Therefore I suggest you change the subject or tags to include Cisco.
0

Featured Post

Flexible connectivity for any environment

The KE6900 series can extend and deploy computers with high definition displays across multiple stations in a variety of applications that suit any environment. Expand computer use to stations across multiple rooms with dynamic access.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
voicemail issue - voip 16 68
set url:tel to a website 3 137
record audio and video on skype without speed slow down 6 61
VTP Setup 4 35
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…
Article by: user_n
How Sip Phone (User Agent) works and communicates with sip servers 1.  There is a sip server and a sip registrar.  The sip server and sip registrar can be one server or two different servers. The sip registrar is the server on which it is record…

739 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