Cisco SX350 Series Administration Manual page 15

Getting Started
Out-Of-Band Port
Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x
The switch supports an Out-of-Band (OOB) port. This port is used for the management
network. The out-of-band and the in-band ports share the same IP routing table, therefore you
cannot use the same subnet on both in-band and out-of-band interfaces.
The OOB port is assigned an MAC address which is different from the base MAC
address and the addresses of the in-band ports. This MAC address is used as the
source MAC address in all frames (including IP frames) sent by the switch on the
OOB port.
The IP address assigned to this port cannot be assigned to the in-band ports at the same time.
In addition, the IP address assigned to the OOB port must not belong to any IP subnet
configured at the in-band interfaces of the devices.
By default, the OOB port is configured with the default IP address 192.168.1.254. This default
IP address is used when no other address was assigned (dynamically or statically). This sub net
is a reserved one and cannot be assigned on the in-band interfaces.
Bridging
Bridging between the OOB port and the in-band Layer 2 interfaces is not
supported. The OOB port cannot be a member of VLAN or LAG, and the bridge's
protocols (for example, STP, GVRP, etc.) cannot be enabled on the OOB port.
Only untagged traffic is supported on the OOB port.
Port Configuration
The following Ethernet configuration is supported for the OOB port:
• Speed (10/100/1000)
• Duplex
• Auto-negotiation
DHCP Client
DHCP client (IPv4 and IPv6) is enabled by default on the OOB port and on the default VLAN.
Static route on OOB port
Static routes are supported on the OOB port.
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