Users Guide

• 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 CSF to FP link.
CONFIGURATION mode
buffer csf linecard
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 -
Debugging and Diagnostics
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