search for: at_a_glance_c45

Hi there, I?m working on deploying our new cluster. Masters have 5?1gbps (i210 and i350, thus using igb.ko), configured with mtu 9000, 802.3ad. Works fine *but* I can?t get DCB working (pause frame, aka flow control, which is supported by and enabled on our switches). [root at master2 ~]# dcbtool gc eno1 dcb Command: Get Config Feature: DCB State Port: eno1 Status:

...itches purposefully disable 802.3x flow control. Also PFC has to negotiate between two devices/switches matching QoS/CoS/no-drop policies. Some good reading for beginner PFC knowledge: http://www.cisco.com/c/dam/en/us/solutions/collateral/data-center-virtualization/ieee-802-1-data-center-bridging/at_a_glance_c45-460907.pdf What exactly are you trying to pause? Typically FCoE/iSCSI is set to "no-drop" and Ethernet traffic is paused/dropped in favor of storage traffic. If there is only one type/class/CoS of traffic PFC won't gain much over regular flow control/802.3x. Hope that helps.