Cat3550's Voice Vlan Question..

From: wwwjjang@chol.com
Date: Wed Jul 23 2003 - 22:11:33 GMT-3


I have been confused by the Voice Vlan ..
what's the right answer of the question?

Q>Asssme there are cisco ip-phones attatched to port fa0/20 & fa0/21.
 - Configure voice vlan 40 for ports 0/20 & 0/21 with the native
   and data vlans set to 10

--------------
My answer1>
--------------
 mls qos
 interface FastEthernet0/20
  mls qos trust cos
  switchport mode trunk
  switchport trunk encapsulation dot1q
  switchport trunk native vlan 10
  switchport voice vlan 40
  no ip address
  no cdp enable
  spanning-tree portfast trunk
!
 interface FastEthernet0/21
  mls qos trust cos
  switchport mode trunk
  switchport trunk encapsulation dot1q
  switchport trunk native vlan 10
  switchport voice vlan 40
  no ip address
  no cdp enable
  spanning-tree portfast trunk
--------------
My answer2>
--------------
 mls qos
 interface FastEthernet0/20
  mls qos trust cos
  switchport mode access **
  switchport access vlan 10 **
  switchport mode trunk
  switchport trunk encapsulation dot1q
  switchport trunk native vlan 10
  switchport voice vlan 40
  no ip address
  no cdp enable
  spanning-tree portfast trunk
!
 interface FastEthernet0/21
  mls qos trust cos
  switchport mode access **
  switchport access vlan 10 **
  switchport mode trunk
  switchport trunk encapsulation dot1q
  switchport trunk native vlan 10
  switchport voice vlan 40
  no ip address
  no cdp enable
  spanning-tree portfast trunk



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