show class-of-service forwarding-class
Syntax
show class-of-service forwarding-class
Description
Display information about forwarding classes, including the mapping of forwarding classes to queue numbers.
Required Privilege Level
view
Output Fields
Table 1 describes
the output fields for the show class-of-service forwarding-class command. Output fields are listed in the approximate order in which
they appear.
Field Name |
Field Description |
|---|---|
|
Name of the forwarding class. |
|
Forwarding class identifier. (QFX5110, QFX5200, and QFX5210 switches only) For DSCP-based PFC, the forwarding class ID is assigned from (and should be the same as) the configured PFC priority for the forwarding class. See Configuring DSCP-based PFC for Layer 3 Untagged Traffic for details. |
|
CoS output queue mapped to the forwarding class. |
|
Not supported on EX Series switches or the QFX Series and can be ignored. |
|
(EX8200 switches only) Fabric priority
for the forwarding class, either |
|
(QFX Series only) Packet loss attribute to differentiate lossless forwarding classes from lossy forwarding classes:
|
PFC Priority |
(QFX5110, QFX5200, and QFX5210 switches only) For DSCP-based PFC, the explicitly configured PFC priority configured for the forwarding class. The DSCP value on which PFC is enabled maps to this priority, and this priority is used in PFC pause frames sent to the peer to request to pause traffic on the mapped DSCP value when the link becomes congested. The forwarding class ID is assigned from and should match this value in the output of this command. See Configuring DSCP-based PFC for Layer 3 Untagged Traffic for details. |
Sample Output
show class-of-service forwarding-class
user@switch> show class-of-service forwarding-class Forwarding class ID Queue Policing priority best-effort 0 0 normal expedited-forwarding 1 5 normal assured-forwarding 2 1 normal network-control 3 7 normal
Sample Output
show class-of-service forwarding-class (EX8200 Switch)
user@switch> show class-of-service forwarding-class Forwarding class ID Queue Fabric priority best-effort 0 0 low expedited-forwarding 1 5 low assured-forwarding 2 1 low network-control 3 7 low mcast-be 4 2 low mcast-ef 5 4 low mcast-af 6 6 low
Sample Output
- show class-of-service forwarding-class (QFX Series)
- show class-of-service forwarding-class (QFX Series with DSCP-based PFC)
show class-of-service forwarding-class (QFX Series)
user@switch> show class-of-service forwarding-class Forwarding class ID Queue Policing priority No-Loss best-effort 0 0 normal Disabled fcoe 1 3 normal Enabled no-loss 2 4 normal Enabled network-control 3 7 normal Disabled mcast 8 8 normal Disabled
show class-of-service forwarding-class (QFX Series with DSCP-based PFC)
user@switch> show class-of-service forwarding-class Forwarding class ID Queue Policing priority No-Loss PFC priority best-effort 0 0 normal Disabled fcoe 1 3 normal Enabled no-loss 2 4 normal Enabled fc2 3 2 normal Enabled 3 network-control 5 7 normal Disabled fc1 7 1 normal Enabled 7 mcast 8 8 normal Disabled
On switches that do not use different forwarding classes and
output queues for unicast and multidestination (multicast, broadcast,
destination lookup fail) traffic, there is no mcast forwarding
class and there is no queue 8. (Switches that use different forwarding
classes and output queues for unicast and multidestination traffic
support 12 forwarding classes and output queues, of which four of
each are dedicated to multidestination traffic. Switches that use
the same forwarding classes and output queues for unicast and multidestination
traffic support eight forwarding classes and eight output queues.)
Release Information
Command introduced in Junos OS Release 9.0.
PFC priority output field introduced for DSCP-based PFC in Junos OS Release 17.4R1 for the QFX Series.