Table of Contents
Advertisement
Configuring Interfaces
Configuring Ethernet Interfaces
Default Ethernet Interface Configuration
Table 6 on page 32
Ethernet interface default configuration for UNIs and ENIs. For more details on the VLAN parameters listed in the table,
see
Configuring VLANs, page 271
Note:
To configure Layer 2 parameters, if the interface is in Layer 3 mode, you must enter the switchport interface
configuration command without any parameters to put the interface into Layer 2 mode. This shuts down the interface
and then re-enables it, which might generate messages on the device to which the interface is connected. When you
put an interface that is in Layer 3 mode into Layer 2 mode, the previous configuration information related to the affected
interface might be lost, and the interface is returned to its default configuration.
Table 6
Default Ethernet Configuration for NNIs
Feature
Operating mode
Allowed VLAN range
Default VLAN (for access ports)
Native VLAN (for 802.1Q trunks)
VLAN trunking
Port enable state
Port description
Speed
Duplex mode
802.3x flow control
EtherChannel
Port blocking (unknown multicast and unknown
unicast traffic)
Broadcast, multicast, and unicast storm control
Port security
Port Fast
Auto-MDIX
Power over Ethernet (PoE)
Cisco Discovery Protocol (CDP)
VMPS
shows the Ethernet interface default configuration for NNIs, and
Default Setting
Layer 2 or switching mode (switchport command).
VLANs 1– 4094.
VLAN 1 (Layer 2 interfaces only).
VLAN 1 (Layer 2 interfaces only).
Switchport mode access (Layer 2 interfaces only).
Enabled.
None defined.
Autonegotiate.
Full.
Flow control is set to receive: off. It is always off for sent packets.
Disabled on all Ethernet ports. See
page 1027
Disabled (not blocked) (only Layer 2 interfaces).
Disabled.
Disabled (only Layer 2 interfaces).
Disabled.
Enabled.
Note:
device—such as Cisco IP phones and access points that do not fully
support 802.3af/802.3at—if that powered device is connected to the
switch through a crossover cable. This is regardless of whether
auto-MIDX is enabled on the switch port.
Enabled (auto).
Enabled.
Not configured.
The switch might not support a pre-standard powered
32
Table 7 on page 33
shows the
Configuring EtherChannels,
- Quick Links:
- Configuration Overview
Hide quick links:
Advertisement
Chapters
Table of Contents
Troubleshooting
