Fig1 represents 3 security contexts all sharing a common VLAN(500) a single IP subnet corresponds to that VLAN. This is equivalent to connecting three security appliances using an ethernet switch. A property of the FWSM makes all interfaces all interfaces across the entire module use only one global MAC address. This is usually not a problem, until multiple contexts start sharing an interface which operational function within the FWSM handles this issue?
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