Cisco Catalyst 3550 Series, Software Configuration Manual, Page: 250 / 992

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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 10 Configuring Interface Characteristics
Configuring Ethernet Interfaces
Default Ethernet Interface Configuration
Table 10-1 shows the Ethernet interface default configuration. For more details on the VLAN parameters
listed in the table, see Chapter 12, “Configuring VLANs.” For details on controlling traffic to the port,
see Chapter 21, “Configuring Port-Based Traffic Control.”
Table 10-1 Default Ethernet Interface Configuration
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.
Native VLAN (for 802.1Q trunks) VLAN 1.
VLAN trunking Switchport mode dynamic desirable (supports DTP).
Port enable state All ports are enabled.
Port description None defined.
Speed Autonegotiate.
Duplex mode Autonegotiate.
Flow control Flow control is set to off for receive and desired for send for
Gigabit Ethernet ports. For 10/100 Mb/s ports, send is always off.
EtherChannel (PAgP) Disabled on all Ethernet ports. See Chapter 30, “Configuring
EtherChannels.”
Port blocking (unknown multicast
and unknown unicast traffic) Disabled (not blocked). See the “Configuring Port Blocking”
section on page 21-6 .
Broadcast, multicast, and unicast
storm control Disabled. See the “Default Storm Control Configuration” section
on page 21-3 .
Protected port Disabled. See the “Configuring Protected Ports” section on
page 21-5 .
Port security Disabled. See the “Default Port Security Configuration” section
on page 21-10 .
Port Fast Disabled.