Dell S4048–ON Configuration Manual page 1011

• Define a buffer profile for the FP queues.
CONFIGURATION mode
buffer-profile fp fsqueue
• Define a buffer profile for the CSF queues.
CONFIGURATION mode
buffer-profile csf csqueue
• Change the dedicated buffers on a physical 1G interface.
BUFFER PROFILE mode
buffer dedicated
• Change the maximum number of dynamic buffers an interface can request.
BUFFER PROFILE mode
buffer dynamic
• Change the number of packet-pointers per queue.
BUFFER PROFILE mode
buffer packet-pointers
• Apply the buffer profile to a line card.
CONFIGURATION mode
buffer fp-uplink linecard
• Apply the buffer profile to a CSF to FP link.
CONFIGURATION mode
buffer csf linecard
Examples of Viewing Buffer Information
Dell Networking OS Behavior: If you attempt to apply a buffer profile to a non-existent port-pipe, Dell Networking OS displays the
following message: %DIFFSERV-2-DSA_BUFF_CARVING_INVALID_PORT_SET: Invalid FP port-set 2 for
linecard 2. Valid range of port-set is <0-1>. However, the configuration still appears in the running-config.
Configuration changes take effect immediately and appear in the running configuration. Because under normal conditions all ports do
not require the maximum allocation, the configured dynamic allocations can exceed the actual amount of available memory; this
allocation is called oversubscription. If you choose to oversubscribe the dynamic allocation, a burst of traffic on one interface might
prevent other interfaces from receiving the configured dynamic allocation, which causes packet loss.
You cannot allocate more than the available memory for the dedicated buffers. If the system determines that the sum of the
configured dedicated buffers allocated to the queues is more than the total available memory, the configuration is rejected, returning
a syslog message similar to the following: 00:04:20: %S50N:0 %DIFFSERV-2-DSA_DEVICE_BUFFER_UNAVAILABLE:
Unable to allocate dedicated buffers for stack-unit 1, port pipe 0, egress port 25 due to
unavailability of cells.
Dell Networking OS Behavior: When you remove a buffer-profile using the no buffer-profile [fp | csf] command from
CONFIGURATION mode, the buffer-profile name still appears in the output of the show buffer-profile [detail |
summary] command. After a line card reset, the buffer profile correctly returns to the default values, but the profile name remains.
Remove it from the show buffer-profile [detail | summary] command output by entering no buffer [fp-
uplink |csf] linecard port-set buffer-policy from CONFIGURATION mode and no buffer-policy from
INTERFACE mode.
To display the allocations for any buffer profile, use the show commands.
Debugging and Diagnostics
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