Dell S5000 FTOS 9.0(1.3) Configuration Guide for the Switch - Page 1028

www.dell.com | support.dell.com Buffer tuning commands Task Define a buffer profile for the FP queues. Define a buffer profile for the CSF queues. Change the dedicated buffers on a physical 1G interface. Change the maximum amount of dynamic buffers an interface can request. Change the number of packet-pointers per queue. Apply the buffer profile to a stack unit. Apply the buffer profile to a CSF to FP link. Command buffer-profile fp fsqueue buffer-profile csf csqueue buffer dedicated buffer dynamic buffer packet-pointers buffer fp-uplink stack-unit buffer csf stack-unit Command Mode CONFIGURATION CONFIGURATION BUFFER PROFILE BUFFER PROFILE BUFFER PROFILE CONFIGURATION CONFIGURATION FTOS Behavior: If you attempt to apply a buffer profile to a non-existent port-pipe, FTOS displays the following message. However, the configuration still appears in the running-config. %DIFFSERV-2-DSA_BUFF_CARVING_INVALID_PORT_SET: Invalid FP port-set 2 for stack-unit 2. Valid range of port-set is Configuration changes take effect immediately and appear in the running configuration. Since under normal conditions all ports do not require the maximum possible allocation, the configured dynamic allocations can exceed the actual amount of available memory; this 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. Table 56-4. Buffer Allocation Error 00:04:20: %S5000:0 %DIFFSERV-2-DSA_DEVICE_BUFFER_UNAVAILABLE: Unable to allocate dedicated buffers for stack-unit 0, port pipe 0, egress port 25 due to unavailability of cells FTOS Behavior: When you remove a buffer-profile using the command no buffer-profile [fp | csf] from CONFIGURATION mode, the buffer-profile name still appears in the output of show buffer-profile [detail | summary]. After a stack unit is 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] stack-unit port-set buffer-policy from CONFIGURATION mode and no buffer-policy from INTERFACE mode. Display the allocations for any buffer profile using the show commands in Figure 56-10. Display the default buffer profile using the command show buffer-profile stack-unit from EXEC Privilege mode, as shown in Figure 56-9. 1028 | S5000 Debugging and Diagnostics