09-15-2017 04:19 AM
Im a bit puzzeled by the flow control on a Long distance LS port
Will a ISL configured in LS mode ever take use of the Virtual channles ?
Solved! Go to Solution.
09-15-2017 05:28 AM
We have three major mode - R_RDY, VC_RDY (standard eport), EXT_VC_RDY (long distance). And QoS is working (Low, High) is working with VC_RDY and EXT_VC_RDY. So, QoS VC are can be used in LS (EXT_VC_RDY).
Further, do not forget that in LS mode (EXT_VC_RDY) without QoS, we have traffic on VC0 (F traffic) and VC2 (collapsed VC2 to VC5).
The only mode no using any VC, is R_RDY (portcfgislmode).
09-15-2017 07:00 AM
Hi Martin Thanks for the answer
I still have a follow up question
1- if R_RDY is not set on a LS port will then EXT_VC_RDY autmatically be enabled ?
2- Will EXT_VC_RDY use all the "datachannels" 2, 3, 4, and 5 for data transfere ?
09-15-2017 08:24 AM
when you specify a longdistance mode - LD,LS,LE (and the earlier L1 L2) - EXT_VC_RDY (reminder = EXTension) will be enabled (if not R_RDY mode is enabled).
The longdistance mode EXT_VC_RDY will use VC2 only (collapse VC2,3,4,5 onto VC2 for data transfer). So VC0 and VC2 is used only. If QoS is enabled, the VC8,9 (low) and VC10,11,12,13,14 (High) are also used.