Guidelines And Limitations For Vn-Segment; Enabling Vn-Segment - Cisco Nexus 6000 Series Configuration Manual

Configuring VN-Segment
4 S4 receives the VN-Segment ID tagged packet and performs packet lookups. Once the packet destination
port is identified as a VNSEG edge port, S4 uses the VLAN ID corresponding to the VN-Segment ID in
the packet and sends the packet.
If the VN-Segment ID to VLAN mapping does not exist, the packet is dropped.
Note
5 Server B receives the .1Q data packet from Server A.
The same process is followed in the data packets from server B to server A.

Guidelines and Limitations for VN-Segment

VN-Segment has the following guidelines and limitations:
• The VN-Segment tag is added to traffic egressing FabricPath (FP) links only.
• Data forwarding semantics is the same as that of the VLANs.
• The devices must be VN-Segment aware with appropriate hardware support.
• Leaf switches must be configured for VN-Segment.
• The Virtual Network Identifier (VNI) is the network global ID, not the VLAN ID.
• Up to 4K VN-Segments and global VLANs are supported per leaf switch. There are only 4K VLANs.
• Different leafs can have different mapping to up to support 50K tenants on the fabric, depending on
• If compatibility checks fail for the image, ISSD might be rejected .
• The VLAN-to-VN-Segment mapping must be consistent on the vPC+ peer switches for correct traffic

Enabling VN-Segment

Procedure
Step 1
Step 2
Step 3
Step 4
hardware and software limitations.
flow. vPC type 1 consistency checks suspend VLANs on vPC peer swtiches with inconsistent mappings.
Command or Action
switch# configure terminal
switch(config)# install feature-set
fabricpath
switch(config)# feature-set fabricpath
switch(config)# feature
vn-segment-vlan-based
Cisco Nexus 6000 Series NX-OS Layer 2 Switching Configuration Guide, Release 7.x

Guidelines and Limitations for VN-Segment

Purpose
Enters global configuration mode.
Installs the FabricPath feature set on the switch.
Enables the FabricPath feature set on the switch.
Enables the VN-Segment feature on the switch.
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