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Assuming you are talking about Link Aggregation Groups (please specify, because "LAG" can have many meanings), they only make sense when connecting two switches together, or two network ports on the same server, or in any other situation when you want to treat two physical links as a single logical one (this is known as "Etherchannel" in Cisco land). This ...


A Cisco router will not let you have interfaces with overlapping IP address ranges (unless you start looking into VRF's). R1(config)#int fa0/0 R1(config-if)#ip address R1(config-if)#int fa0/1 R1(config-if)#ip address % overlaps with FastEthernet0/0 To be honest, the topology that you propose ...


You're using /24 on one switch and /28 on the other. That means thinks is in the same subnet, it is not. You'll need to route between the networks.

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