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show class-of-service shared-buffer

Syntax

Description

Display the shared buffer allocation and partitioning configuration.

Note:

Due to QFX5200 cross-point architecture, all buffer usage counters are maintained separately. When usage counters are displayed with the command show class-of-service shared-buffer on QFX5200, various pipe counters are displayed separately.

Options

none

Display ingress and egress shared buffer settings.

egress

(Optional) Display the egress shared buffer settings.

ingress

(Optional) Display the ingress shared buffer settings.

Required Privilege Level

view

Output Fields

Table 1 describes the output fields for the show class-of-service shared-buffer command. Output fields are listed in the approximate order in which they appear.

Table 1: show class-of-service shared-buffer Output Fields

Field Name

Field Description

Ingress

Ingress shared buffer configuration.

Total Buffer

Total buffer space available to the ports in KB. This is the combined dedicated buffer pool and shared buffer pool.

Dedicated Buffer

Buffer space allocated to the dedicated buffer pool in KB.

Shared Buffer

Buffer space allocated to the shared buffer pool in KB.

Lossless

Buffer space allocated to the lossless traffic buffer pool in KB.

Lossless Headroom

Buffer space allocated to the lossless headroom traffic buffer pool to support priority-based flow control (PFC) and Ethernet PAUSE in KB. (Ingress ports only.)

Note:

OCX Series switches do not support PFC.

Lossy

Buffer space allocated to the lossy (best-effort) traffic buffer pool in KB.

Lossless Headroom Utilization

Utilization of the ingress lossless headroom buffer pool. (These fields can help you to determine how much headroom buffer space you need to reserve to support PFC and Ethernet PAUSE for lossless flows.)

Note:

OCX Series switches do not support PFC.

Node Device

Index number that identifies the switch. On a QFX3500 switch, this field always has a value of zero (0).

Total

Size of the lossless headroom ingress buffer pool in KB.

Used

Amount in KB of lossless headroom ingress buffer used.

Free

Amount in KB of lossless headroom ingress buffer free (unused).

Egress

Egress shared buffer configuration.

Multicast

Buffer space allocated to the multicast traffic buffer pool in KB. (Egress ports only.)

Sample Output

show class-of-service shared-buffer

Release Information

Command introduced in Junos OS Release 12.3.