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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
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Chapter 9 Configuring Interface Characteristics
Configuring Ethernet Interfaces
Configuring User Network and Network Node Interfaces
By default, all the 10/100 ports on the Cisco ME switch are configured as UNIs, and the SFP module
ports are configured as NNIs.
You can use the port-type interface configuration command to change the port types. At any one time,
only four ports on the switch can be configured as NNIs, but every port on the switch can be configured
as UNIs.
When a port is changed from an NNI to a UNI, it inherits the configuration of the assigned VLAN, either
in isolated or community mode. For more information about configuring UNI isolated and UNI
community VLANs, see Chapter 11, “Configuring VLANs.”
Note When you change a port from NNI to UNI or the reverse, any features exclusive to the port type are
removed from the configuration to prevent conflicting configuration options on a specific interface type.
Table 9-2 Default Ethernet Configuration for UNIs
Feature Default Setting
Operating mode Layer 2 or switching mode (switchport command).
Allowed VLAN range VLANs 1– 4094.
Default VLAN (for access ports) VLAN 1 (Layer 2 interfaces only).
Native VLAN (for IEEE 802.1Q
trunks)
VLAN 1 (Layer 2 interfaces only).
VLAN trunking Switchport mode access (Layer 2 interfaces only).
Dynamic VLAN Enabled.
Port enable state Disabled when no configuration file exists.
Port description None defined.
Speed Autonegotiate.
Duplex mode Autonegotiate.
IEEE 802.3x flow control Flow control is set to receive: off. It is always off for sent packets.
EtherChannel Disabled on all Ethernet ports. See Chapter 31, “Configuring
EtherChannels.”
Port blocking (unknown multicast
and unknown unicast traffic)
Disabled (not blocked) (only Layer 2 interfaces). See the
“Configuring Port Blocking” section on page 21-7.
Broadcast, multicast, and unicast
storm control
Disabled. See the “Default Storm Control Configuration” section
on page 21-3.
Port security Disabled (only Layer 2 interfaces). See the “Default Port Security
Configuration” section on page 21-10.
Auto-MDIX Enabled.
