Hi everyone, I’m currently working on a migration project for one of my customers, transitioning their network from a Cisco 3750 stack to a Meraki 9300M CS 16.8 environment. The current setup includes 3 Cisco 3750 switches in a stack, with 12 port-channels configured in "mode on" for EtherChannel. In the Meraki environment, I have configured link aggregation accordingly. I have a couple of questions: Compatibility of "mode on": On the 3750s, all EtherChannels are configured using channel-group <X> mode on. On the Meraki side, I have configured link aggregation. Is it correct to use Meraki aggregation with "mode on" on the Cisco 3750 side, or is there a better recommended configuration? Cross-stack port-channels: On the 3750 stack, several port-channels are configured using interfaces from different physical switches. For example: Port-channel 1: - Gi2/0/13 (Switch 2) - Gi3/0/13 (Switch 3) Port-channel 3: - Gi2/0/1 (Switch 2) - Gi3/0/1 (Switch 3) Port-channel 13: - Gi1/0/11 (Switch 1) - Gi2/0/11 (Switch 2) - Gi3/0/11 (Switch 3) Port-channel 15: - Gi1/0/5 (Switch 1) - Gi2/0/17 (Switch 2) - Gi3/0/17 (Switch 3) In the new Meraki 9300M setup, it appears that cross-switch (cross-stack) aggregation is not supported in the same way. Is it required that all member interfaces of a port-channel be on the same physical Meraki switch? For example, in the Meraki setup, I believe it would need to be restructured like this: Port-channel 1: Current (3750): Gi2/0/13 + Gi3/0/13 New (Meraki): Gi2/0/13 + Gi2/0/25 (if available) Port-channel 3: Current (3750): Gi2/0/1 + Gi3/0/1 New (Meraki): Gi2/0/1 + Gi2/0/26 I would appreciate any confirmation or recommendations on how to best approach this in the Meraki environment.
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