Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide, Rel. 12.2(25)SEF1

10-14
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
OL-8915-01
Chapter 10 Configuring VLANs
Configuring VLAN Trunks
For more details about the show command options and explanations of output fields, see the command
reference for this release.
Configuring VLAN Trunks
These sections contain this conceptual information:
• Trunking Overview, page 10-14
• Encapsulation Types, page 10-16
• Default Layer 2 Ethernet Interface VLAN Configuration, page 10-17
• Configuring an Ethernet Interface as a Trunk Port, page 10-17
• Configuring Trunk Ports for Load Sharing, page 10-21
Trunking Overview
A trunk is a point-to-point link between one or more Ethernet switch interfaces and another networking device
such as a router or a switch. Ethernet trunks carry the traffic of multiple VLANs over a single link, and you
can extend the VLANs across an entire network.
Two trunking encapsulations are available on all Ethernet interfaces:
• Inter-Switch Link (ISL)—Cisco-proprietary trunking encapsulation.
• IEEE 802.1Q— industry-standard trunking encapsulation.
show interfaces [vlan
vlan-id]
Privileged EXEC Display characteristics for all interfaces or for
the specified VLAN configured on the switch.
show vlan [id vlan-id] Privileged EXEC Display parameters for all VLANs or the
specified VLAN on the switch.
Table 10-3 VLAN Monitoring Commands (continued)
Command Command Mode Purpose