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Interoperate with other vendors' switches

Hello, I have a Catalyst Express 500 Switch (WS-CE500-24-TT) and a TrendNet TE-100-S24 Fast Ethernet Switch connected by the port 24 each one, but I have some problems with the people connected to TrendNet switch, because the Cisco display the following error message:

Severity: 3-Error

Description: Port Fa24: Dynamic Host Configuration Protocol (DHCP) reply messages dropped for non-existing or disconnected devices on this in interface.

I tried to apply Cisco Smartport "Switch" port role to the port 24, but it doesn't function well, then I applied the "Other" role, and it allow to connect the people to the network, but I have to disconnect the user, run standard diagnostic test along with link test to the Cisco's port 24 and the reconnect the user.

Could you give me any suggestions?

My e-mail is:

Thanks in advance for your support.

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