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11-17-2014 01:45 PM
11-17-2014 01:45 PM
HP TEAM vs NIC properties
Javier had a question regarding NIC teaming properties in the OS vs NIC properties on each adapter:
*************
Hello Team,
Win2K8 R2
NC522SFP + TEAM v10.90
A customer is asking me about disabling the following TEAM/NIC properties:
· Large Received Offload (LRO)
· Large Send Offload V1 IPV4
· Large Send Offload V2 (IPV4)
· TCP Checksum Offload (IPv4)
· TCP Connection Offload (IPv4)
Sometimes some properties appear in both TEAM and NIC driver properties.
Is it necessary disable them in both (TEAM and NIC properties)?, I'm unable to find information about this.
************
Input from Richard:
**************
I cannot speak to Windows, but in linux-land at least, if a feature is disabled at the NIC, it will not be enabled at the bond.
Also, ChecKsum Offload (CKO) is the foundation of virtually all the stateless offloads of a NIC. Disable that, and LRO and LSO are effectively toast. Also, from the standpoint of CPU consumed per unit of network transfer, the NIC will basically be little more than a 1990's era 100Base-T NIC with multi-queue. Unless the customer's workload is all small packets which don't really benefit from stateless offloads in the first place, there will be an increase in CPU consumption and a corresponding performance drop. Perhaps a considerable one.
***********
Other comments?
- Tags:
- NIC