Users Guide

Table Of Contents
5–Fibre Channel Noninteractive Commands
-bbcr (BB Credit Recovery)
Doc. No. TD-000947 Rev. 1
Janurary 29, 2021 Page 33 Copyright © 2021 Marvell
-bbcr (BB Credit Recovery)
Buffer-to-buffer credit recovery (BB-CR) enables two FC peer ports (N_Port,
F_Port, or E_Port) to periodically send and receive the quantity of receiver ready
(R_RDY) signals transmitted. The BB-CR feature allows the peer port to recover
from possible R_RDY signals lost over a lossy link. BB-CR enables two FC ports
logged in with each other to recover lost buffer-to-buffer credits. These lost credits
can impact throughput, cause link resets, and disrupt traffic flow.
To display current BB credit status of a specific HBA port, issue the following
command:
qaucli -bbcr <hba instance>|<hba wwpn>|<all> --info
To enable a BB credit of 5 to a specific HBA port of the HBA, issue the following
command:
qaucli -bbcr <hba instance>|<hba wwpn>|<all> --enable 5
To disable the BB credit option on a specific HBA port of the HBA, issue the
following command:
qaucli -bbcr <hba instance>|<hba wwpn>|<all> --disable 0
To display BB credit statistics on a specific HBA port of the HBA, issue the
following command:
qaucli -bbcr <hba instance>|<hba wwpn>|<all> --stats
(To stop running BB credit statistics, press the ENTER key.)
Where:
NOTE
On Solaris only:
Reset is disabled if the system detects storage SR-IOV or VFs.
The Flash update does not take effect until the system is restarted
<hba instance> = Adapter number (use the -g command to find)
<hba wwpn> = World wide port name of the adapter
<all> = All discovered adapters