Configuring Port Buffering


Port buffering allocates storage for packets that cannot be immediately forwarded or processed on a port.


To display port buffer information (in percentages and bytes), use the port-buffer-show command. This command displays ingress and egress buffer utilization for each port:


CLI (network-admin@switch) > port-buffer-show


port-buffer-show

Display port buffer information.

time date/time: yyyy-mm-ddThh:mm:ss

Time to start statistics collection.

start-time date/time: yyyy-mm-ddThh:mm:ss

Start time of statistics collection

end-time date/time: yyyy-mm-ddThh:mm:ss

End time of statistics collection

duration duration: #d#h#m#s

Duration of statistics collection

interval duration: #d#h#m#s

Interval between statistics collection.

since-start

Specify to display port buffering since start.

older-than duration: #d#h#m#s

Specify an older-than time to display port buffering.

within-last duration: #d#h#m#s

Specify a within-last time to display port buffering.

port port-list

The list of ports.


CLI (network-admin@switch*) > port-buffer-show


port ingress-used-buf ingress-used-buf-val egress-used-buf egress-used-buf-val 

---- ---------------- -------------------- --------------- ------------------- 

5    2%               150K                 0%              0                   

9    0%               0                    0%              0                   

13   0%               0                    0%              0                   

17   0%               22.5K                0%              0                   

21   0%               0                    0%              0                   

25   0%               0                    0%              0                   

29   0%               0                    0%              0                   

33   0%               0                    0%              0                   

34   0%               0                    0%              0                   

35   0%               0                    18%             1.12M               

37   0%               0                    0%              0                   

41   0%               0                    0%              0                   

45   6%               405K                 0%              0                   

49   0%               0                    0%              0                   

61   0%               0                    0%              0                   

69   0%               0                    0%              0                   

121  8%               567K                 0%              0                   

129  0%               0                    0%              0                   

130  0%               0                    0%              0


Use the port-buffer-settings-modify command to enable the collection of port buffer information and to modify the logging interval and the internal storage space (called disk-space) allocated for the data collected for the command output above:


CLI (network-admin@switch) > port-buffer-settings-modify


port-buffer-settings-modify

Modify port buffer settings.

enable|disable

Specify if you want to enable or disable the collection of port buffer information.

interval duration: #d#h#m#s

Specify the interval for the logging of port buffer information.

disk-space disk-space-number

Specify the amount of memory to be allotted for the collection of port buffering information. The default value is 50MB.


For example, to set an interval of 2 minutes for logging port buffer information, use the command:


CLI (network-admin@switch) > port-buffer-settings-modify interval 2m


To display the port buffering settings, use the port-buffer-settings-show command:


CLI (network-admin@switch) > port-buffer-settings-show

switch: switch

enable: yes

interval: 2m

disk-space: 50M

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