Deployment Guide

BUFFER PROFILE mode
buffer dedicated
• Change the maximum number of dynamic buers 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 buer prole to a CSF to FP link.
CONFIGURATION mode
buffer csf linecard
Dell Networking OS Behavior: If you attempt to apply a buer prole 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 conguration still appears in the running-cong.
Conguration changes take eect immediately and appear in the running conguration. Because under normal conditions all ports do not
require the maximum allocation, the congured 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 trac on one interface might prevent other
interfaces from receiving the congured dynamic allocation, which causes packet loss.
You cannot allocate more than the available memory for the dedicated buers. If the system determines that the sum of the congured
dedicated buers allocated to the queues is more than the total available memory, the conguration 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 buer-prole using the no buffer-profile [fp | csf] command from
CONFIGURATION mode, the buer-prole name still appears in the output of the
show buffer-profile [detail | summary]
command. After a stack unit reset, the buer prole correctly returns to the default values, but the prole 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 buer prole, use the show commands.
To display the default buer prole, use the show buffer-profile {summary | detail} command from EXEC Privilege mode.
Example of Viewing the Default Buer Prole
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 Buer Prole Allocations
Dell#show running-config interface tengigabitethernet 2/0 !
interface TenGigabitEthernet 2/0
Debugging and Diagnostics
347