Etherchannel suspended between Catalyst 4948 and VSS 6506E

Hello,
I describe an issue when i need to performe an L2 or L3 Etherchannel from a Catalyst 4948 IOS Enterprise and 2 xCatalyst 6506E bandled with VSS.
From the VSS Side when i plug cables i see on the physicals and Etherchannel that Physical and protocole layer are up. On the 4948 side,
I see that physical layer is up and protocol and Etherchannel interfaces are down.
On the Etherchannel port summary i see that the port state is supended.
On the first attempt, i have test with a L3 etherchannel on both side using no switchport with two IP addresses one at each side on etherchannel interfaces.
The etherchannel are bundled with LACP mode active and on the second attempt with PAGP mode ON.
The same configured on VSS 6506E work fine with Catalyst 3560E.
Please do you have any idea?

Hi David, when ı type "no mls qos channel-consistency" under port-channel
the issue was solved. But ı am not comfortable with that, Because ı want to use Qos feature
here the "show module all"
GedizCore#show module switch all
Switch Number: 1 Role: Virtual Switch Standby
Mod Ports Card Type Model Serial No.
1 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX SAL10478XGB
4 16 CEF720 16 port 10GE WS-X6716-10GE SAL17204RU1
5 5 Supervisor Engine 720 10GE (Hot) VS-S720-10G SAL1833YQER
8 16 CEF720 16 port 10GE WS-X6716-10GE SAL16010BSU
Mod MAC addresses Hw Fw Sw Status
1 001a.2f08.6930 to 001a.2f08.695f 2.11 12.2(18r)S1 15.1(1)SY1 Ok
4 4c4e.3591.2378 to 4c4e.3591.2387 2.0 12.2(18r)S1 15.1(1)SY1 Ok
5 bc16.655b.a27c to bc16.655b.a283 4.3 8.5(4) 15.1(1)SY1 Ok
8 7081.055f.91c0 to 7081.055f.91cf 1.2 12.2(18r)S1 15.1(1)SY1 Ok
Mod Sub-Module Model Serial Hw Status
1 Centralized Forwarding Card WS-F6700-CFC SAL10478RZ7 2.1 Ok
4 Distributed Forwarding Card WS-F6700-DFC3C SAL172052B2 1.6 Ok
5 Policy Feature Card 3 VS-F6K-PFC3C SAL1834Z3M7 1.3 Ok
5 MSFC3 Daughterboard VS-F6K-MSFC3 SAL1827VVKQ 5.2 Ok
8 Distributed Forwarding Card WS-F6700-DFC3C SAL160315JW 1.6 Ok
Mod Online Diag Status
1 Pass
4 Pass
5 Pass
8 Pass
Switch Number: 2 Role: Virtual Switch Active
Mod Ports Card Type Model Serial No.
2 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX SAL1442WG3X
3 16 CEF720 16 port 10GE WS-X6716-10GE SAL1441WAPL
5 5 Supervisor Engine 720 10GE (Active) VS-S720-10G SAL1441VWRG
Mod MAC addresses Hw Fw Sw Status
2 1cdf.0f90.89e8 to 1cdf.0f90.8a17 3.4 12.2(18r)S1 15.1(1)SY1 Ok
3 f866.f220.3258 to f866.f220.3267 1.0 12.2(18r)S1 15.1(1)SY1 Ok
5 c47d.4ffe.40b0 to c47d.4ffe.40b7 3.2 8.5(4) 15.1(1)SY1 Ok
Mod Sub-Module Model Serial Hw Status
2 Distributed Forwarding Card WS-F6700-DFC3C SAL1442WFR0 1.4 Ok
3 Distributed Forwarding Card WS-F6700-DFC3C SAL1441W1B8 1.4 Ok
5 Policy Feature Card 3 VS-F6K-PFC3C SAL1440VPD4 1.1 Ok
5 MSFC3 Daughterboard VS-F6K-MSFC3 SAL1441VWZG 5.1 Ok
Mod Online Diag Status
2 Pass
3 Pass
5 Pass

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