Trunk Port Downlink Configuration - Dell Force10 C150 Manual

Deploying the Dell Force10 MXL into a Cisco Nexus Network Environment

Trunk Port Downlink Configuration

Trunk ports can participate in multiple VLANs over one Ethernet interface and are often used for
connection to virtualization hosts and other VLAN aware applications. To keep the traffic of the
different VLANs from mixing, a numbered tag is inserted in each Ethernet frame (with the optional
exception of the interface's "native" VLAN). To deploy a trunk port on an MXL running PVST follow
these four steps.
Configure a Downlink as a Trunk Port
MXL2#configure
MXL2(conf)#interface tengigabitethernet 0/1
MXL2(conf-if-te-0/1)#portmode hybrid
MXL2(conf-if-te-0/1)#switchport
MXL2(conf-if-te-0/1)#spanning-tree pvst edge-port
MXL2(conf-if-te-0/1)#exit
MXL2(conf)#exit
MXL2#
The "switchport" setting enables a switch's Ethernet interface to participate in VLANs. A switchport
enabled interface is referred to as a layer-2 interface. (Note: If the Ethernet interface had previously
been configured as a layer-3 interface—which is one with an IP address directly configured on it—than
the "no ip address" command would need to be run on the interface before the switchport feature
could be enabled.)
The "portmode hybrid" command allows an Ethernet interface to carry both multiple tagged VLANs and
a single untagged (also called a native) VLAN. If a given port is only expected to carry tagged VLANs or
a single untagged VLAN, the "portmode hybrid" command may be omitted from its configuration.
The "spanning-tree pvst edge-port" command should only be run on ports that will connect to servers
or other end nodes and never on ports that will connect to other switches. This command designates a
port as an expected edge of the spanning tree (only switches participate in spanning tree) and enables
it to begin forwarding traffic as soon as it's link is active (many seconds before the spanning-tree
protocol would otherwise allow it to forward traffic).
With the switchport feature enabled, the Ethernet interface is now ready for one or more tagged
VLANs to be configured for it.
Configure Tagged VLANs for a Trunk Port Interface
MXL2#configure
MXL2(conf)#interface vlan 11
MXL2(conf-if-vl-11)#tagged tengigabitethernet 0/1
MXL2(conf-if-vl-11)#no shutdown
MXL2(conf-if-vl-11)#exit
MXL2(conf)#interface vlan 12
MXL2(conf-if-vl-12)#tagged tengigabitethernet 0/1
MXL2(conf-if-vl-12)#no shutdown
MXL2(conf-if-vl-12)#exit
MXL2(conf)#exit
MXL2#
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