finance_teacher
asked on
VOIP Phone -- Daisy Chaining Fails ?
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
--------------------------
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
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SOLUTION
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ASKER
Any ideas like "Cisco Catalyst 3560G" has something build-in for security that says "Allow Daisy Chain = NO" ?