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5 qos troubleshooting, 1 commands for monitor and debug, 1 show class-map – Accton Technology ES4626 User Manual

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Switch(Config-PolicyMap)#class c1

Switch(Config--Policy-Class)#set ip precedence 5

Switch(Config--Policy-Class)#exit

Switch(Config-PolicyMap)#exit

Switch(Config)#interface ethernet 1/1

Switch(Config-Ethernet1/1)#service-policy input p1

QoS configuration in SwitchB:

SWITCH#CONFIG

Switch(Config)#mls qos

Switch(Config)#interface ethernet 1/1

Switch(Config-Ethernet1/1)#mls qos trust ip-precedence pass-through-cos

8.1.5 QoS Troubleshooting

z

QoS is disabled on switch ports by default, 8 sending queues are set by default,

queue1 forwards normal packets, other queues are used for some important control

packets (such as BPDU).

z

When QoS is enabled in Global Mode,. QoS is enabled on all ports with 8 traffic

queues. The default CoS value of the port is 0; the port is in not Trusted state by

default; the default queue weight values are 1, 2, 3, 4, 5, 6, 7, 8 in order, all QoS Map

is using the default value.

z

CoS value 7 maps to queue 8 that has the highest priority and usually reserved for

certain protocol packets. It is not recommended for the user to change the mapping

between CoS 7 to Queue 8, or set the default port CoS value to 7.

z

Policy map can only be bound to ingress direction, egress is not supported yet.

z

If the policy is too complex to be configured due to hardware resource limit, error

massages will be provided.

8.1.5.1 Commands for Monitor And Debug

8.1.5.1.1 show class-map

Command: show class-map [<class-map-name>]

Function:

Displays class map of QoS.

Parameters: < class-map-name>

is the class map name.

Default:

N/A.

Command mode:

Admin Mode

Usage Guide:

Displays all configured class-map or specified class-map information.

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