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New Member

Can I mix Layer 2 and layer 3 Etherchannel

HI,

Can one end of the ehterchannel act as  layer 3 and other end act as layer 2 access  port?

int fa0/1

switchport mode access

channel-group 1 mode on

int fa0/2

switchport mode access

channel-group 1 mode on

!

interface Port-channel1

switchport mode access

Layer 3

int port-channel 1

IP adress 10.10.10.1 255.255.255.248

int G0/1

no ip address

channel-group 1 mode on

int G0/2

no ip address

channel-group 1 mode on

  • LAN Switching and Routing
5 REPLIES
Cisco Employee

Can I mix Layer 2 and layer 3 Etherchannel

Hello,

Yes, you can mix them. If possible, though, do not use the mode on but instead, use LACP using mode active on both ends of the EtherChannel.

Best regards,

Peter

New Member

Can I mix Layer 2 and layer 3 Etherchannel

Many thanks Peter.

I will now try that.

Regards

Salman

VIP Purple

Re: Can I mix Layer 2 and layer 3 Etherchannel

Hi Peter,

I also thought both end of a etherchannel should have same config (duplex, speed, config, etc). It is interesting if you could configure one end as L3 & other end of the etherchannel config as L2 & bring the etherchannel up.

Salman: Anyway test it & let us know if it works ?

Regards

Rasika

Re: Can I mix Layer 2 and layer 3 Etherchannel

Hi.

I will work but, for example if one end of the port-channel is configured in the broadcast domain 10.10.10.0/49 then the other end of the port-channel that is assigned to vlan x ( vlan 1 in the example you typed in the intial post) must be in the same broadcast domain otherwise traffic will be dropped.

Regards.

Wilson B.

New Member

Hi

Hi

Did you ever test this case? I need to do L3 etherchannel on ASR to L2 etherchannel on 2960X without using subinterfaces on router.

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