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Monitoring CoS Forwarding Classes

Purpose

View the current assignment of class-of-service (CoS) forwarding classes to queues on the switch.

Action

To monitor CoS forwarding classes in the J-Web interface, select Monitor > Class of Service > Forwarding Classes.

To monitor CoS forwarding classes in the CLI, enter the following CLI command:

show class-of-service forwarding-class

Meaning

Table 1 summarizes key output fields for CoS forwarding classes.

Table 1: Summary of Key CoS Forwarding Class Output Fields

Field	Values
Forwarding Class	Names of forwarding classes assigned to queue numbers. The following are the default forwarding classes: best-effort—Provides no special CoS handling of packets. Loss priority is typically not carried in a CoS value. expedited-forwarding—Provides low loss, low delay, low jitter, assured bandwidth, and end-to-end service. assured-forwarding—Provides high assurance for packets within specified service profile. Excess packets are dropped. network-control—Packets can be delayed but not dropped. EX8200 switches have the following additional default forwarding classes: mcast-be—Provides no special CoS handling of packets. mcast-ef—Provides low loss, low delay, low jitter, assured bandwidth, and end-to-end service. mcast-af—Provides high assurance for packets within the specified service profile. Excess packets are dropped.
Queue	Queue number corresponding to the forwarding class name. The default forwarding classes are assigned as follows: best-effort—0 expedited-forwarding—5 assured-forwarding—1 network-control—7 mcast-be—2 mcast-ef—4 mcast-af—6
Fabric Priority	(EX8200 switches only) Fabric priority for the forwarding class, either high or low. The fabric priority determines the priority of packets ingressing the switch fabric.

Field

Values

Forwarding Class

Names of forwarding classes assigned to queue numbers. The following are the default forwarding classes:

best-effort—Provides no special CoS handling of packets. Loss priority is typically not carried in a CoS value.
expedited-forwarding—Provides low loss, low delay, low jitter, assured bandwidth, and end-to-end service.
assured-forwarding—Provides high assurance for packets within specified service profile. Excess packets are dropped.
network-control—Packets can be delayed but not dropped.

EX8200 switches have the following additional default forwarding classes:

mcast-be—Provides no special CoS handling of packets.
mcast-ef—Provides low loss, low delay, low jitter, assured bandwidth, and end-to-end service.
mcast-af—Provides high assurance for packets within the specified service profile. Excess packets are dropped.

Queue

Queue number corresponding to the forwarding class name. The default forwarding classes are assigned as follows:

best-effort—0
expedited-forwarding—5
assured-forwarding—1
network-control—7
mcast-be—2
mcast-ef—4
mcast-af—6

Fabric Priority

(EX8200 switches only) Fabric priority for the forwarding class, either high or low. The fabric priority determines the priority of packets ingressing the switch fabric.