Vxlan Offload - Chelsio Communications Terminator Series Installation And User Manual

Chapter II. Network (NIC/TOE)
v. Synchronize the system clock to a PTP hardware clock (PHC) on slave nodes.
[root@host~]# phc2sys -s <interface> -c CLOCK_REALTIME -w -m
4.4.

VXLAN Offload

Virtual Extensible LAN (VXLAN) is a network virtualization technique that uses overlay
encapsulation protocol to provide Ethernet Layer 2 network services with extended scalability and
flexibility. VXLAN extends the virtual LAN (VLAN) address space by adding a 24-bit segment ID
and increasing the number of available logical networks from 4096 to 16 million, thereby
addressing the scalability and network segmentation issues associated with large cloud
computing deployments. Chelsio's Terminator based adapters are uniquely capable of offloading
the processing of VXLAN encapsulated frames such that all stateless offloads (checksums and
TSO) are preserved, resulting in significant performance benefits. This is enabled by default on
loading the driver.
Host Configuration
i. Load the network driver.
[root@host~]# modprobe cxgb4
ii. Configure larger MTU on the Chelsio interface to accommodate the larger frame size due to
VXLAN encapsulation. Assign IP address and bring it up.
[root@host~]# ifconfig <interface> <IP iaddress> mtu 1600 up
Chelsio Unified Wire for Linux 59