Pakets destined to different ip destinations seen on the same switch port
I am using a WS-C4948 to connect many subnets in different vlans. The 27 bit subnets contain customer servers and one of these subnets conatains 3 "DataDomain Servers" 2 of them have more than one interface in this subnet. The customer-servers backup there Data to the DataDomain servers unsing NFS or Windows shares. See the Network diagram attached
The DataDomain Servers are
CISS012 - Interface 26 - IP 172.18.0.14/27.
CISS012 - Interface 44 - IP 172.18.0.13/27.
CISS013 - Interface PO1 - IP 172.18.0.15/27.
CISS013 - Interface 41 - IP 172.18.0.16/27.
CISS902 - Interface 42 - IP 172.18.0.19/27.
The problem that i have is that exactly the same pakets are being received on interface 26 and 41. I done the following test:
I have configured 2 span ports to receive the data from pots 26 and 41 separetly and connected to notebooks to the span ports, startted wireshark and can see that
- The data destined to 172.18.0.16 and the data destined to 172.18.0.14 are being received on both interfaces 26 and 41.
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