Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

Dell Networking OS Behavior : If you attempt to apply a buffer profile to a non-existent port-pipe, the system 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 0, 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 stack unit 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.

To display the allocations for any buffer profile, use the show commands.

To display the default buffer profile, use the show buffer-profile {summary | detail} command from EXEC Privilege mode.

Example of Viewing the Default Buffer Profile

Dell#show buffer-profile detail interface tengigabitethernet 0/1
                                 Interface tengig 0/1
                                 Buffer-profile -
                                 Dynamic buffer 194.88 (Kilobytes)
                                 Queue# Dedicated Buffer  Buffer Packets
                                 (Kilobytes)
                                 0      2.50              256
                                 1      2.50              256
                                 2      2.50              256
                                 3      2.50              256
                                 4      9.38              256
                                 5      9.38              256
                                 6      9.38              256
                                 7      9.38              256
                              

Example of Viewing the Buffer Profile Allocations

Dell#show running-config interface tengigabitethernet 0/6 !
                                 interface TenGigabitEthernet 0/6
                                 mtu 9252
                                 switchport
                                 no shutdown
                                 buffer-policy myfsbufferprofile
                                 
                              

Example of Viewing the Buffer Profile (Interface)

Dell#
                                 show buffer-profile detail int te 0/2
                                 Interface Te 0/2
                                 Buffer-profile fsqueue-fp
                                 Dynamic buffer 1256.00 (Kilobytes)
                                 Queue# Dedicated Buffer  Buffer Packets
                                 Kilobytes)
                                 0      3.00              256
                                 1      3.00              256
                                 2      3.00              256
                                 3      3.00              256
                                 4      3.00              256
                                 5      3.00              256
                                 6      3.00              256
                                 7      3.00              256
                                 
                              

Example of Viewing the Buffer Profile (Linecard)

Dell#
                                 show buffer-profile detail fp-uplink stack-unit 0 port-set 0
                                 Linecard 0 Port-set 0
                                 Buffer-profile fsqueue-hig
                                 Dynamic Buffer 1256.00 (Kilobytes)
                                 Queue# Dedicated Buffer Buffer Packets
                                 (Kilobytes)
                                 0      3.00             256
                                 1      3.00             256
                                 2      3.00             256
                                 3      3.00             256
                                 4      3.00             256
                                 5      3.00             256
                                 6      3.00             256
                                 7      3.00             256