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The host network adapter’s gateway and DNS configure collision lead the host can’t connect to the internet

Publication Date:  2012-09-18 Views:  57 Downloads:  0
Issue Description
Customer use a S2600 as the mail server’s storage. There are two network adapters in the mail server. One is connected to internet to offer mail service. The other one supply storage service. Customers say that they can’t connect to the internet if they connect to the mail server. The storage and server use direct connection type without switch.
Alarm Information
Null
Handling Process
Please clear the default gateway and DNS in the network adapter which connects to the storage, reserve IP address and subnet mask. The mail server can connect to the internet and we can find arrays.
Root Cause
Customer configure the default gateway and DNS in a network adapter which connects to the storage, and the default gateway is same with the network adapter connected to internet
We can’t connect the internet because the server choose the network adapter which is connected to the storage as the network exit.
Suggestions
When engineers come with these phenomena, ensure the networking mode first. Exclude the two network adapters in the same network segment and connect to the storage without layer 3 equipment. Then we can make sure the network adapter’s configuration in server.

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