port channel, switchport trunk allowed vlan

Hi all:

CISCO6509#show vlan id 123

VLAN Name Status Ports

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I only issued the "switchport trunk allowed vlan 123" on Po64, not on Po200. but when I "show vlan id" as above, It said both Po200, Po64 allowed vlan 123. Are there any reason causing this problem?

----------------------------------------------------------------------------------------------------------------------------- interface Port-channel64 switchport switchport trunk encapsulation dot1q switchport trunk allowed vlan 123 switchport mode trunk switchport nonegotiate no ip address end

interface Port-channel200 switchport switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate no ip address end

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Regards