Flow Control ProCurve 2810

[NS2004]

My objective is to try and eliminate performance bottlenecks on my iscsi setup. Various suggestions have indicated swtiching on flow control on the ports.

Now i need some advice. Why would flow control not be running on port that is enabled for flow control. See config below (relevant lines in bold)

Ports 13, 16, 19 - 21 are all enabled for flow control yet the only one that seems to have it switched on is port 19.

PStack-1# show int con

 Port Settings

  Port   Type      | Enabled Mode         Flow Ctrl MDI
  ------ --------- + ------- ------------ --------- ----
  1      100/1000T | Yes     Auto         Disable   Auto
  2      100/1000T | Yes     Auto         Disable   Auto
  3      100/1000T | Yes     Auto         Disable   Auto
  4      100/1000T | Yes     Auto         Disable   Auto
  5-Dyn1 100/1000T | Yes     Auto         Disable   Auto
  6-Dyn1 100/1000T | Yes     Auto         Disable   Auto
  7-Dyn1 100/1000T | Yes     Auto         Disable   Auto
  8-Dyn1 100/1000T | Yes     Auto         Disable   Auto
  9      100/1000T | Yes     Auto         Disable   Auto
  10     100/1000T | Yes     Auto         Disable   Auto
  11     100/1000T | Yes     Auto         Disable   Auto
  12     100/1000T | Yes     Auto         Disable   Auto
  13     100/1000T | Yes     Auto         Enable    Auto
  14     100/1000T | Yes     Auto         Disable   Auto
  15     100/1000T | Yes     Auto         Disable   Auto
  16     100/1000T | Yes     Auto         Enable    Auto
  17     100/1000T | Yes     Auto         Disable   Auto
  18     100/1000T | Yes     Auto         Disable   Auto
  19     100/1000T | Yes     Auto         Enable    Auto
  20     100/1000T | Yes     Auto         Enable    Auto
  21     100/1000T | Yes     Auto         Enable    Auto
  22     100/1000T | Yes     Auto         Disable   Auto
  23     100/1000T | Yes     Auto         Disable   Auto
  24     100/1000T | Yes     Auto         Disable   Auto

PStack-1# show int brief

 Status and Counters - Port Status

                   | Intrusion                           MDI   Flow  Bcast
  Port   Type      | Alert     Enabled Status Mode       Mode  Ctrl  Limit
  ------ --------- + --------- ------- ------ ---------- ----- ----- ------
  1      100/1000T | No        Yes     Down   1000FDx    MDI   off   0
  2      100/1000T | No        Yes     Down   1000FDx    MDI   off   0
  3      100/1000T | No        Yes     Down   1000FDx    MDI   off   0
  4      100/1000T | No        Yes     Down   1000FDx    MDIX  off   0
  5-Dyn1 100/1000T | No        Yes     Up     1000FDx    MDIX  off   0
  6-Dyn1 100/1000T | No        Yes     Up     1000FDx    MDIX  off   0
  7-Dyn1 100/1000T | No        Yes     Up     1000FDx    MDI   off   0
  8-Dyn1 100/1000T | No        Yes     Up     1000FDx    MDIX  off   0
  9      100/1000T | No        Yes     Down   1000FDx    MDI   off   0
  10     100/1000T | No        Yes     Down   1000FDx    MDIX  off   0
  11     100/1000T | No        Yes     Down   1000FDx    MDIX  off   0
  12     100/1000T | No        Yes     Down   1000FDx    MDI   off   0
  13     100/1000T | No        Yes     Up     1000FDx    MDI   off   0
  14     100/1000T | No        Yes     Down   1000FDx    MDI   off   0
  15     100/1000T | No        Yes     Down   1000FDx    MDIX  off   0
  16     100/1000T | No        Yes     Up     1000FDx    MDIX  off   0
  17     100/1000T | No        Yes     Down   1000FDx    MDIX  off   0
  18     100/1000T | No        Yes     Down   1000FDx    MDIX  off   0
  19     100/1000T | No        Yes     Up     1000FDx    MDIX  off   0
  20     100/1000T | No        Yes     Up     1000FDx    MDI   on    0
  21     100/1000T | No        Yes     Up     1000FDx    MDIX  off   0
  22     100/1000T | No        Yes     Down   1000FDx    MDIX  off   0
  23     100/1000T | No        Yes     Down   1000FDx    MDIX  off   0
  24     100/1000T | No        Yes     Down   1000FDx    MDI   off   0

Thanks

[JeroenL]

Is Flow-Control enabled on the devices connected to the ports you specify?

[NS2004]

I eventually changed out the switches. ProCurve 2810-24G were simply not good enough for iSCSI. I put in old Dell powerConnects with large port buffers and everything started working smoothly. And to answer your question, yes flow control was switched on then. Not any more as not needed.

[jmglass]

we went from 2810 to 2910al switches for iSCSI for better performance, also no Jumbo and flow control at same time per HP on the 2810, OK to do both on 2910al switches.