The TCP congestion control algorithm for XenServer SP2 is Reno even though the kernel version of Dom0 is 2.6.32
----------------+-----------------------------------
Kernel Version | TCP congestion algorithm
----------------+-----------------------------------
| Tahoe & Reno
----------------+-----------------------------------
| Vegas
----------------+------------------------------------
| New Reno
----------------+------------------------------------
| Hybla
----------------+------------------------------------
2.6.8 ~ 2.6.18 | BIC
----------------+------------------------------------
~ 2.6.19 | CUBIC
-----------------------------------------------------
참조
http://en.wikipedia.org/wiki/TCP_congestion_avoidance_algorithms
----------------+-----------------------------------
Kernel Version | TCP congestion algorithm
----------------+-----------------------------------
| Tahoe & Reno
----------------+-----------------------------------
| Vegas
----------------+------------------------------------
| New Reno
----------------+------------------------------------
| Hybla
----------------+------------------------------------
2.6.8 ~ 2.6.18 | BIC
----------------+------------------------------------
~ 2.6.19 | CUBIC
-----------------------------------------------------
참조
http://en.wikipedia.org/wiki/TCP_congestion_avoidance_algorithms