Port-Channel between 40gig and 10Gig interfaces

[Nehadeepu]

Hi,

I want to configure the port-channel between 49Gig and 10Gibs. One side is a Cisco 3850 with 40gig interfaces and remote end is a Cisco4500X with SPF + interface. Can we set up EtherChannel between the two switches?

[marce1000]

 - Only  , if the individual ports on  the 3850 can auto-downgrade-negotiate to 10g (you can't expect the 4500 to become suddenly 40g-capable).

 M.

[Deepak Kumar]

Hi,

Check the capabilities details as:

sho interfaces fortyGigabitEthernet 1/1/1 capabilities
FortyGigabitEthernet1/1/1
Model: WS-C3850-48XS
Type: unknown
Speed: 10,100,1000,auto
Duplex: full,half,auto
Trunk encap. type: 802.1Q
Trunk mode: on,off,desirable,nonegotiate
Channel: yes
Broadcast suppression: percentage(0-100)
Flowcontrol: rx-(off,on,desired),tx-(none)
Fast Start: yes
QoS scheduling: rx-(not configurable on per port basis),
tx-(2p6q3t)
CoS rewrite: yes
ToS rewrite: yes
UDLD: yes
Inline power: no
SPAN: source/destination
PortSecure: yes
Dot1x: yes

If you will find the details as highlighted (Speed and Duplex) then it will work.