Deployment Guide
Note that in the sample commands provided in the following procedure, 12 buffers are configured
for an F_Port.
To disable the port buffer configuration and return to the default buffer allocation, use the --disable
option.
switch:admin> portcfgfportbuffers --disable 2/44
NOTE
The configured number of buffers for a given port is stored in the configuration database and is
persistent across reboots. The F_Port buffer feature does not support EX_Port, Port Mirroring,
Long-Distance, L_Port, FastWrite, QoS, and Trunk Area enabled ports. F_Port Buffers are mutually
exclusive to E_Port Credits
Monitoring buffers in a port group
Use the portBufferShow command to monitor the remaining buffers on a long-distance link and to
monitor the average frame size and average buffer usage for a given port.
1. Connect to the switch and log in using an account assigned to the admin role.
2. Enter the portBufferShow command.
The average frame size in bytes is shown in parentheses with the average buffer usage for packet
transmission and reception.
switch:admin> portbuffershow 17
User Port Lx Max/Resv Avg Buffer Usage & FrameSize Buffer Needed Link Remaining
Port Type Mode Buffers Tx Rx Usage Buffers Distance Buffers
---- ---- ---- ------- ---------------------------- ------ ------- --------- ------
64 - 8 - ( - ) - ( - ) 0 - -
65 - 8 - ( - ) - ( - ) 0 - -
66 - 8 - ( - ) - ( - ) 0 - -
67 - 8 - ( - ) - ( - ) 0 - -
68 E LS 806 197(2012) 201(2044) 206 206 100km
69 E - 8 1(2016) 1(2020) 26 26 2km
70 E - 8 1(2012) 1(2036) 26 26 2km
71 E - 8 1(2008) 2(2052) 26 26 2km
192 - 8 - ( - ) - ( - ) 0 - -
193 - 8 - ( - ) - ( - ) 0 - -
194 - 8 - ( - ) - ( - ) 0 - -
195 - 8 - ( - ) - ( - ) 0 - -
196 - 8 - ( - ) - ( - ) 0 - -
197 - 8 - ( - ) - ( - ) 0 - -
198 - 8 - ( - ) - ( - ) 0 - -
199 - 8 - ( - ) - ( - ) 0 - - 4556
--------------------------------------------------------------------------------------------------
Buffer credits per switch or blade model
The following table shows the total FC ports in a switch or blade, the number of user ports in a port
group, and the unreserved buffer credits available per port group.
Formula: Remaining buffers = Total Buffers - [(Total FE Ports * 8) + (Total BE/BI Ports * Buffers for
BE/BI Port) + EMB Buffers + SAB Buffers.
Monitoring buffers in a port group
124 Fabric OS Administrators Guide
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