6.0

Table Of Contents
When TSO is enabled on a vNIC, the vNIC might send a large packet to a distributed switch. When LRO is
enabled on a vNIC, small packets sent to it might be merged into a large packet.
Source Destination Description
TSO LRO Packets from the source vNIC might be large packets, and whether they are split is
determined by whether their sizes are larger than the destination vNIC LRO limitation.
TSO Any destination Packets from the source vNIC might be large packets, and they are split to standard
packets at the destination vNIC.
Any source LRO Packets from the source vNIC are standard packets, and they might be merged into
larger packets at the destination vNIC.
Create a Port Mirroring Session with the vSphere Client
Create a port mirroring session to mirror vSphere distributed switch traffic to specific physical switch ports.
Prerequisites
Create a vSphere distributed switch version 5.0.0 or later.
Procedure
1 Specify Port Mirroring Name and Session Details on page 289
Specify the name, description, and session details for the new port mirroring session.
2 Choose Port Mirroring Sources on page 290
Select sources and traffic direction for the new port mirroring session.
3 Choose Port Mirroring Destinations on page 290
Select ports or uplinks as destinations for the port mirroring session.
4 Verify New Port Mirroring Settings on page 290
Verify and enable the new port mirroring session.
Specify Port Mirroring Name and Session Details
Specify the name, description, and session details for the new port mirroring session.
Prerequisites
Launch the vSphere Client and log in to a vCenter Server system.
Procedure
1 Log in to the vSphere Client and select the Networking inventory view.
2 Right-click the vSphere distributed switch in the inventory pane, and select Edit Settings.
3 On the Port Mirroring tab, click Add.
4 Enter a Name and Description for the port mirroring session.
5 (Optional) Select Allow normal IO on destination ports to allow normal IO traffic on destination ports.
If you do not select this option, mirrored traffic will be allowed out on destination ports, but no traffic
will be allowed in.
6 (Optional) Select Encapsulation VLAN to create a VLAN ID that encapsulates all frames at the
destination ports.
If the original frames have a VLAN and Preserve original VLAN is not selected, the encapsulation
VLAN replaces the original VLAN.
Chapter 23 Advanced Networking
VMware, Inc. 289