DSCP, dot1p, and MPLS EXP classification policies

This chapter provides information to configure the DSCP classification policy, dot1p classification policy, and MPLS EXP classification policy using the CLI.

Overview

These policies allow the user to define a policy or template that maps the packet priority bits, like dot1p, IP DSCP, and MPLS EXP bits to FC and profile. The template can then be used in a SAP ingress policy to define the ingress classification of flows to FC.

The following table describes the support available on different 7210 SAS platforms.

Table 1. Platforms supported for classification policies
Policy name	Support available
dot1p-classification	All platforms with sap-ingress policy and network-qos policy.
DSCP classification	All platforms with sap-ingress policy and network-qos policy.
MPLS-EXP classification	Only 7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C with network-qos policies

DSCP classification policy

This policy is used to define the map of IP DSCP values in the IP header of the packet to FC and profile (ingress profile).

dot1p classification policy

This policy is used define the map of dot1p values in the Ethernet frame to FC and profile (ingress profile).

MPLS EXP classification policy

This policy is used define the map of MPLS EXP values in the MPLS header of the packet to FC and profile (ingress profile).

Configuring classification policies

config>qos>dot1p-classification 1 create
    config>qos>dscp-classification 1 create
    config>qos>mpls-lsp-exp-classification 1 create

The following is a sample configuration output that shows the enabling of the DSCP classification policy, dot1p classification policy, and MPLS EXP classification policy.

*A:K-SASK12>config>qos># info detail
----------------------------------------------
---------exit
        dot1p-classification 1 create
            description "Default Dot1P Classification policy"
            dot1p 0 fc "be" profile out
            dot1p 1 fc "l2" profile in
            dot1p 2 fc "af" profile out
            dot1p 3 fc "af" profile in
            dot1p 4 fc "h2" profile in
            dot1p 5 fc "ef" profile in
            dot1p 6 fc "h1" profile in
            dot1p 7 fc "nc" profile in
        exit
        dot1p-classification 10 create
            no description
        exit
        dscp-classification 1 create
            description "Default DSCP Classification policy"
            dscp be fc "be" profile out
            dscp ef fc "ef" profile in
            dscp cs1 fc "l2" profile in
            dscp nc1 fc "h1" profile in
            dscp nc2 fc "nc" profile in
            dscp af11 fc "af" profile in
            dscp af12 fc "af" profile out
            dscp af41 fc "h2" profile in
        exit
        dscp-classification 20 create
            no description
        exit
        mpls-lsp-exp-classification 1 create
            description "Default MplsLspExp Classification policy"
            lsp-exp 0 fc "be" profile out
            lsp-exp 1 fc "l2" profile in
            lsp-exp 2 fc "af" profile out
            lsp-exp 3 fc "af" profile in
            lsp-exp 4 fc "h2" profile in
            lsp-exp 5 fc "ef" profile in
            lsp-exp 6 fc "h1" profile in
            lsp-exp 7 fc "nc" profile in
        exit
        mpls-lsp-exp-classification 20 create
            no description
        exit
*A:K-SASK12>config>qos>dot1p-classification#

*A:K-SASK12>config>qos>mpls-lsp-exp-classification# info detail
----------------------------------------------
            description "Default MplsLspExp Classification policy"
            lsp-exp 0 fc "be" profile out
            lsp-exp 1 fc "l2" profile in
            lsp-exp 2 fc "af" profile out
            lsp-exp 3 fc "af" profile in
            lsp-exp 4 fc "h2" profile in
            lsp-exp 5 fc "ef" profile in
            lsp-exp 6 fc "h1" profile in
            lsp-exp 7 fc "nc" profile in
----------------------------------------------
*A:K-SASK12>config>qos>mpls-lsp-exp-classification

DSCP, dot1p, and MPLS EXP classification policy command reference

Command hierarchies

Configuration commands for 7210 SAS-K 2F1C2T

    - config
        - qos
            - dot1p-classification classification-id [create]
            - no dot1p-classification classification-id
                - description description-string
                - no description
                - dot1p dot1p-priority fc fc-name profile {in | out}
                - no dot1p dot1p-priority
            - dscp-classification classification-id [use-ip-prec-classification] [create]
            - no dscp-classification classification-id
                - description description-string
                - no description
                - dscp dscp-name fc fc-name profile {in | out}
                - no dscp dscp-name

Configuration commands for 7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C

    - config
        - qos
            - dot1p-classification classification-id [create]
            - no dot1p-classification classification-id
                - description description-string
                - no description
                - dot1p dot1p-priority fc fc-name profile {in | out}
                - no dot1p dot1p-priority
            - dscp-classification classification-id [use-ip-prec-classification] [create]
            - no dscp-classification classification-id
                - description description-string
                - no description
                - dscp dscp-name fc fc-name profile {in | out}
                - no dscp dscp-name
                - prec ip-prec-value fc fc-name profile {in | out}
                - no prec ip-prec-value 
            - mpls-lsp-exp-classification classification-id [create]
            - no mpls-lsp-exp-classification classification-id 
                - description description-string
                - no description
                - lsp-exp mpls-lsp-exp-priority fc fc-name profile {in | out}
                - no lsp-exp mpls-lsp-exp-priority

Show commands

    - show
        - qos
            - dot1p-classification policy-id association [detail]
            - dscp-classification policy-id association [detail]
            - mpls-lsp-exp-classification policy-id association [detail]

Operational commands

    - config
        - qos
            - copy dot1p-classification src-pol dst-pol [overwrite]
            - copy dscp-classification src-pol dst-pol [overwrite]

Command description

Configuration commands

dscp-classification

Syntax

dscp-classification classification-id [use-ip-prec-classification] [create]

no dscp-classification classification-id

Context

config>qos

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

This command defines the mapping of the IP DSCP value in the IP header of the received packet to the forwarding class (FC) and ingress profile.

Note:

A DSCP classification policy with IP precedence can be configured only in a service egress policy and used only with access SAP egress.

The no form of this command removes the definition of the DSCP classification policy. The no form of the policy cannot be executed if the policy is in use; for example, if the policy is associated with a network QoS policy.

Default

dscp-classification 1

Parameters

classification-id

Specifies the DSCP classification policy.

Values: 1 to 65535

use-ip-prec-classification

Keyword to configure the software to use IP precedence entries specified in the DSCP classification policy. If this keyword is not specified, the software uses DSCP classification entries. To maintain backward compatibility, use-ip-prec-classification is not configured by default.

This keyword is only supported on the 7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C.

create: Keyword to create the DSCP classification policy.

description

Syntax

description description-string

no description

Context

config>qos>dscp-classification

config>qos> dot1p-classification

config>qos> mpls-lsp-exp-classification

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

This command creates a text description stored in the configuration file for a configuration context.

The description command associates a text string with a configuration context to help identify the context in the configuration file.

The no form of this command removes any description string from the context.

Parameters

description-string: Specifies a text string describing the entity. Allowed values are any string up to 80 characters composed of printable, 7-bit ASCII characters. If the string contains special characters (#, $, spaces, and so on), the entire string must be enclosed within double quotes.

dscp

Syntax

dscp dscp-name fcfc-name profile {in | out}

no dscp dscp-name

Context

config>qos>dscp-classification

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

This command maps the IP DSCP value to an FC and assigns the ingress profile to the packet. The configured value is used to match the value in the received packet and assign the configured FC and profile on a exact match.

The no form of this command removes the mapping of the IP DSCP value to the FC.

Note:

A default FC is not assigned on executing the no form. The default FC is assigned in the QoS policy with which this policy is associated with.

Parameters

dscp dscp-name

Specifies the IP DSCP value to match by configuring the IP DSCP name corresponding to the DSCP value.

Values: be, ef, cp1, cp2, cp3, cp4, cp5, cp6, cp7, cp9, cs1, cs2, cs3, cs4, cs5, nc1, nc2, af11, af12, af13, af21, af22, af23, af31, af32, af33, af41, af42, af43, cp11, cp13, cp15, cp17, cp19, cp21, cp23, cp25, cp27, cp29, cp31, cp33, cp35, cp37, cp39, cp41, cp42, cp43, cp44, cp45, cp47, cp49, cp50, cp51, cp52, cp53, cp54, cp55, cp57, cp58, cp59, cp60, cp61, cp62, cp63

fc fc-name

Specifies a case-sensitive, system-defined FC name.

Values: be, l2, af, l1, ef, h1, nc

profile {in | out}: Specifies whether the packets assigned to this FC are considered in or out of profile. A value of in defines the packet profile as in-profile and a value of out defines the packet profile to be out-of-profile.

prec

Syntax

prec ip-prec-value [fc fc-name] [profile {in | out}

no prec

Context

config>qos>dscp-classification

Platforms

7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C

Description

This command defines a specific IP precedence value that must be matched to perform the associated reclassification actions. If an egress packet on the SAP matches the specified IP precedence value, the FC or profile may be overridden. By default, the FC and profile of the packet are derived from ingress classification and profiling functions.

The IP precedence bits used to match against precedence reclassification rules come from the Type of Service (ToS) field within the IPv4 header. If the packet does not have an IPv4 header, precedence-based matching is not performed.

The reclassification actions from an IP precedence reclassification rule may be overridden by a DSCP matching event.

The fc keyword is optional. When specified, the egress classification rule overwrites the FC derived from ingress. The new FC is used for egress remarking and queue mapping decisions. If a DSCP match occurs after the IP precedence match, the new FC may be overridden by the higher priority match actions. If the higher priority match actions do not specify a new FC, the FC from the IP precedence match is used.

The profile keyword is optional. When specified, the egress classification rule overwrites the profile of the packet derived from ingress. The new profile value is used for egress remarking and queue congestion behavior. If a DSCP match occurs after the IP precedence match, the new profile may be overridden by the higher priority match actions. If the higher priority match actions do not specify a new profile, the profile from the IP precedence match is used.

The no form of this command removes the reclassification rule from the SAP egress QoS policy.

Parameters

ip-prec-value

Specifies the IP precedence value.

Values: 0, 1, 2, 3, 4, 5, 6, 7

fc-name

Specifies that packets matching the IP precedence value are explicitly reclassified to the specified FC regardless of the ingress classification decision. The explicit FC reclassification may be overwritten by a higher priority DSCP reclassification match. The FC name defined must be one of the eight FCs supported by the system. To remove the FC reclassification action for the specified precedence value, the prec command must be re-executed without the fc-name parameter defined.

Values: be, l2, af, l1, ef, h1, nc

profile: Optional keyword to specify that packets matching the IP precedence value are explicitly reclassified to the specified profile regardless of the ingress profiling decision. The explicit profile reclassification may be overwritten by a higher priority DSCP reclassification match. To remove the profile reclassification action for the specified precedence value, the prec command must be re-executed without the profile parameter defined.

in: Keyword to specify that any packets matching the reclassification rule are treated as in-profile by the egress forwarding plane.

out: Keyword to specify that any packets matching the reclassification rule are treated as out-of-profile by the egress forwarding plane.

dot1p-classification

Syntax

dot1p-classification classification-id [create]

no dot1p-classification classification-id

Context

config>qos

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

This command defines the map of the dot1p value in the Ethernet header of the received frame to the FC and ingress profile.

The no form of this command removes the definition of the policy. The no form of the policy cannot be executed if the policy is in use; for example, if the policy is associated with a network QoS policy.

Default

dot1p-classification 1

Parameters

classification-id

Specifies the policy ID.

Values: 1 to 65535

create: Keyword to create.

dot1p

Syntax

dot1p dot1p-priority fcfc-name profile {in | out}

no dot1p dot1p-priority

Context

config>qos>dot1p-classification

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

This command maps the dot1p value to an FC and assigns the ingress profile to the packet. The configured value is used to match the value in the received packet and assign the configured FC and profile on a exact match.

The no form of this command removes the mapping of the dot1p value to FC.

A default FC is not assigned on executing the no form of this command. The default FC is assigned in the QoS policy with which this policy is associated with.

Parameters

fc fc-name

Specifies a case-sensitive, system-defined FC name.

Values: be, l2, af, l1, ef, h1, nc

profile {in | out}: Specifies whether the packets assigned to this FC are considered in or out of profile. A value of in defines the packet profile as in-profile and a value of out defines the packet profile to be out-of-profile.

dot1p-priority

Specifies the dot1p priority value to match.

Values: 0 to 7

mpls-lsp-exp-classification

Syntax

mpls-lsp-exp-classification classification-id [create]

no mpls-lsp-exp-classification classification-id

Context

config>qos

Platforms

7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C

Description

This command defines the map of the MPLS EXP value in the MPLS header of the received packet to the FC and ingress profile.

Default

default policy 1

Parameters

classification-id

Specifies the policy.

Values: 1 to 65535

create: Keyword to create.

lsp-exp

Syntax

lsp-exp mpls-lsp-exp-priority fc fc-name profile {in | out}

no lsp-exp mpls-lsp-exp-priority

Context

config>qos>mpls-lsp-exp-classification

Platforms

7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C

Description

This command is used to map the MPLS EXP value to an FC and assigns the ingress profile to the packet. The configured value is used to match the value in the received packet and to assign the configured FC and profile on a exact match.

The no form of this command removes the mapping of the MPLS EXP value to the FC.

Note:

A default FC is not assigned on executing the no form. The default FC is assigned in the QoS policy with which this policy is associated with.

Default

default FC is not assigned; the mapping must be explicitly configured

Parameters

mpls-lsp-exp-priority

Specifies the LSP EXP value to match.

Values: 0 to 7

fc fc-name

Specifies a case-sensitive, system-defined FC name.

Values: be, l2, af, l1, ef, h1, nc

profile {in | out}: Specifies whether the packets assigned to this FC is considered in or out of profile. A value of in defines the packet profile as in-profile and a value of out defines the packet profile to be out-of-profile.

Show commands

dot1p-classification

Syntax

dot1p-classification [policy-id] association

dot1p-classification [policy-id] detail

Context

show>qos

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

This command displays the dot1p classification.

Parameters

policy-id: Displays information about the specific policy ID.

associations: Displays the associations of the dot1p classification policy.

detail: Displays the detailed information of the dot1p classification policy.

Output

The following output is an example of dot1p classification policy information, and Output fields: dot1p classification describes the output fields.

Sample output

*A:Dut-A# show qos dot1p-classification 10 detail 
===============================================================================
DOT1P Classification Maps
===============================================================================
-------------------------------------------------------------------------------
Dot1P Class Id     : 10
Description        : (Not Specified)
-------------------------------------------------------------------------------
Dot1P Bit Map                         Forwarding Class                Profile
-------------------------------------------------------------------------------
No Matching Entries
 
-------------------------------------------------------------------------------
Network Policy Associations
-------------------------------------------------------------------------------
No Network Policy Associations found.
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
SAP Ingress Associations
-------------------------------------------------------------------------------
No SAP Ingress Associations found.
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
SAP Egress Associations
-------------------------------------------------------------------------------
SAP Egress Id             : 10
-------------------------------------------------------------------------------
===============================================================================

Table 2. Output fields: dot1p classification
Label	Description
Dot1p Class Id	Displays the dot1p classification policy identifier
Description	Displays a text string that helps identify the policy context in the configuration file
Dscp Bit Map	Displays the dot1p value
Forwarding Class	Displays the forwarding class assigned
Profile	Displays the profile assigned
SAP Egress Id	Displays the associated SAP egress policy ID

dscp-classification

Syntax

dscp-classification [policy-id] association

dscp-classification [policy-id] detail

Context

show>qos

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

This command displays the DSCP classification.

Parameters

policy-id: Displays information about the specific policy ID.

associations: Displays the associations of the dscp-classification policy.

detail: Displays the detailed information of the dscp-classification policy.

Output

The following outputs are examples of DSCP classification policy information, and Output fields: DSCP classification describes the output fields.

Sample output 1

*A:Dut-A# show qos dscp-classification 20 detail 
===============================================================================
DSCP Classification Maps
===============================================================================
-------------------------------------------------------------------------------
Dscp Class Id      : 20
Description        : (Not Specified)
-------------------------------------------------------------------------------
Dscp Bit Map                         Forwarding Class                Profile
-------------------------------------------------------------------------------
cp7                                     nc                              None
 
-------------------------------------------------------------------------------
IP Prec Bit Map                      Forwarding Class                Profile
-------------------------------------------------------------------------------
No Matching Entries
 
-------------------------------------------------------------------------------
Network Policy Associations
-------------------------------------------------------------------------------
No Network Policy Associations found.
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
SAP Ingress Associations
-------------------------------------------------------------------------------
No SAP Ingress Associations found.
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
SAP Egress Associations
-------------------------------------------------------------------------------
SAP Egress Id             : 10
-------------------------------------------------------------------------------
===============================================================================

Sample output 2

*A:Dut-A# show qos dscp-classification 10 detail
===============================================================================
DSCP Classification Maps
===============================================================================
-------------------------------------------------------------------------------
Dscp Class Id      : 10
Description        : (Not Specified)
-------------------------------------------------------------------------------
Dscp Bit Map                         Forwarding Class                Profile
-------------------------------------------------------------------------------
No Matching Entries
 
-------------------------------------------------------------------------------
IP Prec Bit Map                      Forwarding Class                Profile
-------------------------------------------------------------------------------
0                                       nc                              In
1                                       be                              None
2                                       af                              Out
-------------------------------------------------------------------------------
Network Policy Associations
-------------------------------------------------------------------------------
No Network Policy Associations found.
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
SAP Ingress Associations
-------------------------------------------------------------------------------
No SAP Ingress Associations found.
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
SAP Egress Associations
-------------------------------------------------------------------------------
SAP Egress Id             : 10
-------------------------------------------------------------------------------
===============================================================================

Table 3. Output fields: DSCP classification
Label	Description
Dscp Class Id	Displays the DSCP classification policy identifier
Description	Displays a text string that helps identify the policy context in the configuration file
Dscp Bit Map	Displays the DSCP value
Forwarding Class	Displays the forwarding class assigned
Profile	Displays the profile assigned
IP Prec Bit Map	Displays the IP precedence value This field is supported only on the 7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C
SAP Egress Id	Displays the associated SAP egress policy ID

mpls-lsp-exp-classification

Syntax

mpls-lsp-exp-classification [policy-id] association

mpls-lsp-exp-classification [policy-id] detail

Context

show>qos

Platforms

7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C

Description

This command displays the association between network ingress MPLS LSP-EXP values and FCes and profiles.

Parameters

policy-id: Displays information about the specific policy ID.

associations: Displays the associations of the mpls-lsp-exp-classification policy.

detail: Displays the detailed information of the mpls-lsp-exp-classification policy.

Output

The following output is an example of MPLS LSP-EXP information, and Output fields: MPLS LSP EXP classification describes the output fields.

Sample output

===============================================================================
MPLS-LSP-EXP Classification Maps
===============================================================================
-------------------------------------------------------------------------------
Mpls-Lsp-Exp Class Id      : 10
Description                : (Not Specified)
-------------------------------------------------------------------------------
Mpls-Lsp-Exp Bit Map                    Forwarding Class                Profile
-------------------------------------------------------------------------------
1                                       nc                              In
 
-------------------------------------------------------------------------------
Network Policy Associations
-------------------------------------------------------------------------------
Network Policy Id             : 10
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
SAP Ingress Associations
-------------------------------------------------------------------------------
No SAP Ingress Associations found.
-------------------------------------------------------------------------------
===============================================================================

Table 4. Output fields: MPLS LSP EXP classification
Label	Description
Mpls-Lsp-Exp Class Id	Displays the MPLS LSP EXP classification policy identifier
Description	Displays a text string that helps identify the policy context in the configuration file
Mpls-Lsp-Exp Bit Map	Displays the MPLS LSP EXP value
Forwarding Class	Displays the forwarding class assigned
Profile	Displays the profile assigned
Network Policy Id	Displays the network policy identifier
SAP Ingress Associations	Displays the associated SAP ingress policy identifier