Setup Guide
Description SOFS- iSCSI
no ip address
mtu 9216
portmode hybrid
switchport
spanning-tree rstp edge-port
spanning-tree 0 portfast
dcb-map iSCSI
!
protocol lldp
no shutdown
Preserving 802.1Q VLAN Tag Value for Lite
Subinterfaces
All the frames in a Layer 2 VLAN are identied using a tag dened in the IEEE 802.1Q standard to determine the VLAN to which the frames
or trac are relevant or associated. Such frames are encapsulated with the 802.1Q tags. If a single VLAN is congured in a network
topology, all the trac packets contain the same do1q tag, which is the tag value of the 802.1Q header. If a VLAN is split into multiple,
dierent sub-VLANs, each VLAN is denoted by a unique 8021.Q tag to enable the nodes that receive the trac frames determine the
VLAN for which the frames are destined.
Typically, a Layer 3 physical interface processes only untagged or priority-tagged packets. Tagged packets that are received on Layer 3
physical interfaces are dropped. To enable the routing of tagged packets, the port that receives such tagged packets needs to be
congured as a switchport and must be bound to a VLAN as a tagged member port.
A lite subinterface is similar to a normal Layer 3 physical interface, except that additional provisioning is performed to set the VLAN ID for
encapsulation.
A physical interface or a Layer 3 Port channel interface can be congured as a lite subinterface. Once a lite subinterface is congured, only
tagged IP packets with encapsulation VLAN ID are processed and routed. All other data packets are discarded except the Layer 2 and Layer
3 control frames. It is not required for a VLAN ID to be preserved (in the hardware or the OS application) when a VLAN ID, used for
encapsulation, is associated with a physical/Port-channel interface. Normal VLANs and VLAN encapsulation can exist simultaneously and
any non-unicast trac received on a normal VLAN is not ooded using lite subinterfaces whose encapsulation VLAN ID matches with that
of the normal VLAN ID.
You can use the encapsulation dot1q vlan-id command in INTERFACE mode to congure lite subinterfaces.
Flex Hash and Optimized Boot-Up
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