Creating and Managing Wired CoS Profiles

This topic describes:

Managing Wired CoS Profiles

From the Manage CoS Profiles page, you can:

• Create a new CoS profile by clicking Add. For details, see Creating a Wired CoS Profile.
• Modify an existing CoS profile by selecting it and clicking Edit.
• View information about a profile by selecting the profile and clicking Details.
• Delete a CoS profile by selecting a profile and clicking Delete.

  Note: You cannot delete profiles that are in use—that is, assigned to objects or used by other profiles. To see the current assignments for a profile, select the profile and click Details.

• Clone an existing CoS profile by selecting it and clicking Clone.

Table 124 describes the information provided about wired CoS profiles on the Manage CoS Profiles page. This page lists all CoS profiles defined for your network, regardless of the scope you selected in the network view.

Using the Default CoS Profiles for Switches

When you install Network Director, a default CoS profile (juniper_CoS_template) is added to the Manage CoS Profiles page for EX Series switches and another with the same name is added for Campus Switching ELS. Default CoS profiles have most basic settings preconfigured. For example, the forwarding classes in the default CoS profile have already been assigned with default scheduler values. However, you can use the Edit CoS Profile page to optimize your communication with the network by customizing the bandwidth and buffer size assigned to each of the forwarding classes in the default CoS profile.

Using the Default CoS Profiles for Campus Switching ELS with Hierarchical Port Scheduling

When you install Network Director, juniper_CS_Hier_Ehernet_CoS is the default CoS profiles that is installed for Campus Switching ELS with Hierarchical Port Scheduling.

To see the settings configured for a default profile, select it on the Manage CoS Profiles page, then click Details.

Using the Default CoS Profiles for Data Center Switching

When you install Network Director, the following default CoS profiles are installed for Data Center Switching:

• juniper_DC_NonHier_Ethernet_CoS
• juniper_DC_Hier_Ethernet_CoS
• juniper_DC_NonHier_CoS
• juniper_DC_Hier_CoS
• juniper_DC_Hier_FCoE_CoS
• juniper_DC_Hier_CoS_Fusion
• juniper_DC_Non_Hier_CoS_ELS

To see the settings configured for a default profile, select it on the Manage CoS Profiles page, then click Details.

Creating a Wired CoS Profile

Procedure

1. Click in the Network Director banner.
2. Under Select View, select one of the following: Logical View, Location View, Device View or Custom Group View.

   Note: Do not select Dashboard View, Datacenter View or Topology View.

3. From the Tasks pane, expand Wired, expand Profiles, and then select CoS.
4. Click Add to add a new profile.

   Network Director opens the Device Family Chooser window.

5. From the Device Family Chooser, select the wired device family for which you want to create a profile. The available device families are Switching (EX), Campus Switching ELS>Non-Hierarchical Port Scheduling,Campus Switching ELS>Hierarchical Port Scheduling, and Data Center Switching.
6. Click OK.
7. Complete the appropriate settings using the steps mentioned in Specifying Settings for a Switching and Campus Switching ELS CoS Profile, Specifying Settings for a Campus Switching ELS CoS Profile with Hierarchical Port Scheduling (ETS), or Specifying Settings for a Data Center Switching CoS Profile.

Specifying Settings for a Switching and Campus Switching ELS CoS Profile

Procedure

1. Enter the CoS switching settings described in Table 125. Required settings are indicated by a red asterisk (*) that appears next to the field label in the user interface.

   Table 125: CoS Profile Settings for EX and Campus Switching ELS

   Field	Action
   Profile Name	Type the name of the profile. You can use up to 64 characters for profiles created for wired devices. Profile name must not contain special characters or spaces. Note that profiles that are automatically created by Network Director as part of device discovery or out-of-band changes may contain the underscore (_) character.
   Description	Type a description of the profile.

2. Network Director includes four predefined traffic types, Data, Voice, Video, and Network Control. You can either modify those traffic types or you can create your own traffic type. Modify and customize any listed traffic type by selecting the traffic type from the list and clicking Edit, then changing any of the settings described in Table 126.
3. To create your own traffic type, click Add and then configure the settings described in Table 126.

   Table 126: Traffic Configuration and Shaping for EX Switching and Campus Switching ELS

   Field	Description
   Traffic Type	If you are editing a Network Director default traffic type, this field cannot be changed. If you are adding a traffic type, indicate the type of traffic—this can be any value, such as a server name or something to do with your business.
   Forwarding Name	If you are editing a Network Director default traffic type, this field cannot be changed. If you are adding a traffic type, you can use one of the predefined forwarding classes for your switch or you can create your own forwarding class. These forwarding classes are always provided: nd_best-effort, nd_network-control, nd_video-forwarding, and nd_expedited-forwarding. To create your own forwarding class, type a name instead of selecting an option. Most switches support the four predefined forwarding classes listed above. The exception is the EX4300 switch, which has eight default forwarding classes, including the standard four classes, plus multicast-network-connect, multicast-assured-forwarding, multicast-expedited-forwarding, and multicast-network-connect.
   Forwarding Queue	Existing forwarding classes already have associated queues that cannot be altered. If you defined a new forwarding class by specifying your own Forwarding Name, then select an internal queue number to which forwarding classes are assigned. Most switches support queues 0 through 10. The exception is the EX4300 switch, which supports queues 0 through 11. By default, if a packet is not classified, it is assigned to the class associated with queue 0. You can assign only one forwarding class to a queue number.
   Scheduler Map A note in the Scheduler Map section indicates how much buffer size and bandwidth you have available to configure. For example, the message “You have been left with 0 percent buffer size and 0 percent bandwidth.” means that you have no available buffer or bandwidth, and you must reconfigure existing traffic types to free some bandwidth before configuring additional traffic types.
   Low Priority	Enable Low Priority if you want the queue to receive low priority.
   Strict High Priority	Enable Strict High Priority if you want the queue to receive preferential treatment over a low-priority queue. Unlimited bandwidth is assigned to a strict-high priority queue. A strict-high priority queue receives preferential treatment over a low-priority queue. Unlimited bandwidth is assigned to a strict-high priority queue. Queues are scheduled according to the queue number, starting with the highest queue, 7, with decreasing priority down through queue 0. Traffic in higher-numbered queues is always scheduled prior to traffic in lower-numbered queues. In other words, in case of two high-priority queues, the queue with the higher queue number is processed first. Note: You can modify this field in the Traffic Configuration and Shaping table or from the Traffic Configuration and Shaping window.
   Buffer Size (%)	Buffer Size (%) is the size of the memory buffer allocated for storing packets. Use the slider to specify the scheduler Buffer Size percentage. Note: You can modify this value by double-clicking this field in the Traffic Configuration and Shaping table or by sliding the bar in the Traffic Configuration and Shaping window.
   Bandwidth Reserved (%)	Bandwidth Reserved (%) is the amount of interface bandwidth assigned to the queue. Move the slider to specify the Bandwidth Reserved percentage. Defaults are: Data: 30% Voice: Strict High Video: 70% Network control: 0% If Strict-High is enabled for this traffic type, you cannot reserve bandwidth. Note: This field displays the value based on either your input or on the transmit-rate parameter from the switch, if that parameter is configured. While specifying transmit-rate on the EX Series switch, if you choose to specify the value as an exact rate, Network Director converts this value and displays it as a percentage in the Bandwidth Reserved (%) field. You can modify this percentage value from the CoS Profile page.
   Shaping Rate	Move the Shaping Rate slider to throttle the rate of packet transmission by setting a maximum bandwidth (rate in bits per second) or a maximum percentage of bandwidth for a queue or a forwarding class.
   Traffic Classification Behavior aggregate classification classifies packets. The DSCP or DSCP IPv6 precedence bits of the IP header convey the behavior aggregate class information. The information might also be found in the IEEE 802.1ad, or IEEE 802.1p CoS bits.
   Classifier Type	Select a classifier type—DSCP, DSCP-IPv6, INET-precedence, or IEEE-802.1—and associate the corresponding code-point aliases to loss priorities. Note: You can specify code-point—loss priority associations for one or more classifier types. DSCP—Differentiated services code point, a field in IPv4 headers, is used to classify traffic. DSCP-IPv6—Differentiated services code point, a field in IPv6 headers, is used to classify traffic. INET precedence—Field that indicates class of service rewrite rules are used to classify traffic. IEEE-802.1—IEEE 802.1ad, or IEEE 802.1p CoS bits are used to classify traffic.
   Classifier Code Points
   Code Points	The code points list includes all available and unselected code points for the selected classifier type. Specify one or more code-point aliases or bit sets to associate with a forwarding class by moving the value to one of the two lists, Loss Priority Low or Loss Priority High.
   Loss Priority Low	Indicate that packets have low loss priority by selecting code-point aliases from the Code Points table and using the LEFT and RIGHT arrows to move them into the appropriate loss priority table.
   Loss Priority Medium-Low	Indicate that packets have medium-low loss priority by selecting code-point aliases from the Code Points table and using the LEFT and RIGHT arrows to move them into the appropriate loss priority table.
   Loss Priority Medium-High	Indicate that packets have medium-high loss priority by selecting code-point aliases from the Code Points table and using the LEFT and RIGHT arrows to move them into the appropriate loss priority table.
   Loss Priority High	Indicate that packets have high loss priority by selecting code-point aliases from the Code Points table and using the LEFT and RIGHT arrows to move them into the appropriate loss priority table.

4. Click OK to close the Add Traffic and Classification window and save your configuration.

   Your changes are added to this CoS profile.

   Note: If all bandwidth has already been reserved, your changes are not made. Reduce the bandwidth reserved from another Traffic Type, then repeat the configuration.

5. To configure rewrite rules for a forwarding queue, click Configure Rewrite Rules at the bottom of the page. The Configure Rewrite Rules window appears. Specify rewrite rule settings as described below to alter CoS values in outgoing packets on the outbound interfaces of an edge switch:

   Procedure

   1. Select the forwarding class for which you want to create or modify rewrite rules. Network Director lists all the forwarding classes that you have used for configuring traffic in the Traffic Configuration and Shaping section.
   2. For each classifier’s loss priority, select a code-point alias for each loss-priority type—Low, Medium-Low, Medium-High, and High.
6. Click OK to save the rewrite rules and close the Configure Rewrite Rules window.

   The system saves the rewrite rules and returns to the Create CoS Profile page.

7. Click Done.

After you create a CoS profile for switching devices, associate the CoS profile with a Port profile. For directions, see Creating and Managing Port Profiles.

Specifying Settings for a Campus Switching ELS CoS Profile with Hierarchical Port Scheduling (ETS)

You can create a CoS profile for Campus Switching ELS with Hierarchical Port Scheduling by specifying the profile settings and the traffic configuration and shaping details. Hierarchical port scheduling is a two-tier process that provides better port bandwidth utilization and greater flexibility to allocate resources to queues and to groups of queues. Hierarchical scheduling includes the Junos OS implementation of enhanced transmission selection (ETS, described in IEEE 802.1Qaz).

When you open the Create CoS Profile page, Network Director displays two predefined priority groups—data_video_pg and voice_control_pg—with default forwarding classes grouped under each of them. You can modify these priority groups or forwarding classes according to your network requirements.

Procedure

1. Enter the settings described in Table 127. Required settings are indicated by a red asterisk (*) that appears next to the field label in the user interface.

   Table 127: CoS Profile Basic Settings for Campus Switching ELS CoS Profile with Hierarchical Port Scheduling (ETS)

   Field	Action
   Profile Name	Type the name of the profile. You can use up to 64 characters for profiles created for wired devices. Profile name must not contain special characters or spaces. Note that profiles that are automatically created by Network Director as part of device discovery or out-of-band changes may contain the underscore (_) character.
   Description	Type the description of the profile.

2. Specify settings in the Priority Group and Traffic Settings section.

   The table lists priority groups and the forwarding classes they contain in an expandable list. Priority groups refer to forwarding class sets in the device. You can perform these tasks on priority groups and forwarding classes:

   • To add a new priority group, click Add Priority Group. The Add Priority Group and Traffic Control Profile window opens. Enter the settings as described in Table 128.

     Table 128: Add Priority Group and Traffic Control Profile Window

     Field	Description
     Priority Group Name	Enter a name for the priority group.
     Traffic Control Profile Settings
     Transmit Rate (%)	Select a transmit rate percentage for the priority group.
     Shaping Rate (%)	Select a shaping rate percentage for the priority group.

   • To edit a priority group or forwarding class’s properties, click the field that you want to edit in the table. The properties that can be edited are described in Table 129.

     Table 129: Priority Group and Traffic Settings Table Properties

     Field	Description
     No Loss	Select to make the forwarding class lossless. Not applicable to priority groups.
     Strict High	Select to cause the forwarding class to receive preferential treatment over a low-priority queue. Unlimited bandwidth is assigned to a strict-high priority queue. Not applicable to priority groups.
     Transmit Rate (%)	Select the percentage of interface bandwidth assigned to the forwarding class or priority group. If you have enabled Strict-High, you cannot reserve bandwidth for this traffic type.
     Transmit Exact	Select a transmit rate exact to shape or limit the maximum bandwidth.
     Shaping Rate (%)	Select a shaping rate percentage for the forwarding class or priority group.
     Buffer Size (%)	Select the percentage of the memory buffer allocated for storing packets for the forwarding class. Not applicable to priority groups.

   • To edit a forwarding class’s properties, click its name. The Edit Traffic Classification and Shaping for priority group window opens. Enter the settings as described in Table 130.

     Table 130: Edit and Add Traffic Classification and Shaping for Priority Group Window

     Field	Description
     Forwarding Class Name	Select or specify a name for the forwarding class.
     Forwarding Class Queue	Specify the internal queue numbers to which forwarding classes are assigned.
     No Loss	Select to make the forwarding class lossless.
     Scheduler Map
     Strict High	Select if you want the queue to receive preferential treatment over a low-priority queue. Unlimited bandwidth is assigned to a strict-high priority queue.
     Transmit Rate	Select the percentage of interface bandwidth assigned to the forwarding class. If you have enabled Strict-High, you cannot reserve bandwidth for this traffic type.
     Shaping Rate	Select a shaping rate percentage for the forwarding class.
     Buffer Size (%)	Select the percentage of the memory buffer allocated for storing packets for the forwarding class.
     Traffic Classification
     Classifier Type	Select the classifier type that maps packets to a forwarding class and a loss priority.
     Code Points	Specify one or more code-points for associating with a forwarding class.
     Loss Priority Low	Indicates that packets have low loss priority. Select code points from the Code Points table and use the LEFT and RIGHT arrows to move them into the appropriate loss priority table.
     Loss Priority Medium High	Indicates that packets have medium high loss priority. Select code points from the Code Points table and use the LEFT and RIGHT arrows to move them into the appropriate loss priority table.
     Loss Priority High	Indicates that packets have high loss priority. Select code points from the Code Points table and use the LEFT and RIGHT arrows to move them into the appropriate loss priority table.

   • To add a forwarding class to a priority group, click the Add Forwarding Class link at the end of the priority group’s list of forwarding classes. The Add Traffic Classification and Shaping for priority group window opens. Enter the settings as described in Table 130.
   • To remove a priority group or forwarding class, click the X at the end of its table row.
3. Specify priority-based flow control (PFC) settings in the PFC Settings section. Enter the settings as described in Table 131.

   Table 131: PFC Settings for Campus Switching ELS CoS Profile with Hierarchical Port Scheduling (ETS)

   Field	Description
   Input Cable Length (meter)	Enter the length of the cable attached to the input interface, in meters.
   Input
   Add	Click to add an input congestion notification profile (CNP). A new entry appears in the table.
   Remove	Click to remove the selected input CNP.
   IEEE Code Point	Select the IEEE code point for the input CNP.
   Maximum Receive Size (bytes)	Enter the maximum receive unit (MRU) on an interface for traffic that matches the PFC priority, in bytes.
   Output
   Add	Click to add an output CNP. A new entry appears in the table.
   Remove	Click to remove the selected output CNP.
   IEEE Code Point	Select the IEEE code point for the output CNP.
   Queue List	Select output queues on which to enable flow control (PFC pause).

4. Specify rewrite rule settings in the Rewrite Rule Settings section. Enter the settings as described in Table 132.

   Table 132: Rewrite Rule Settings for Campus Switching ELS CoS Profile with Hierarchical Port Scheduling (ETS)

   Field	Description
   Forwarding Name	The name of the forwarding class.
   Queue	The number corresponding to the forwarding queue. You cannot modify this field.
   Rewrite Type	Select a rewrite-rules mapping for the traffic that passes through the various queues on the interface.
   Egress Code Point - Loss Priority Low	Specify a code-point for association with a forwarding class for loss priority low.
   Egress Code Point - Loss Priority Medium High	Specify a code-point for association with a forwarding class for loss priority medium high.
   Egress Code Point - Loss Priority High	Specify a code-point for association with a forwarding class for loss priority high.

5. Click Done to save the changes to the profile.

Specifying Settings for a Data Center Switching CoS Profile

You can create a CoS profile by specifying the profile settings and the traffic configuration and shaping details.

Procedure

1. Enter the settings described in Table 133. Required settings are indicated by a red asterisk (*) that appears next to the field label in the user interface.

   Table 133: CoS Profile Basic Settings for Data Center Switching

   Field	Action
   Profile Name	Type the name of the profile. You can use up to 64 characters for profiles created for wired devices. Profile name must not contain special characters or spaces. Note that profiles that are automatically created by Network Director as part of device discovery or out-of-band changes may contain the underscore (_) character.
   Description	Type the description of the profile.

2. In the Traffic Classification and Shaping Settings section, select one of these as the port scheduling type:
   • Hierarchical—Hierarchical port scheduling (Enhanced Transmission Selection, or ETS) is a two-tier process that provides better port bandwidth utilization and greater flexibility to allocate resources to queues and to groups of queues. Select this scheduling type for QFX3500, QFX3600, QFX5100 devices, and QFabric systems. Skip to Step 3 and continue.
   • Non Hierarchical (EX)—Non-hierarchical scheduling is a one-tier process that provides port bandwidth utilization and allocates resources to queues. Select this scheduling type for EX4500 and EX4550 transit switches. Skip to step 4 and continue.
   • Non Hierarchical (Fusion)—Similar to non-hierarchical (EX) Port Scheduling, but with different forwarding queues. Select this scheduling type if you plan to assign the CoS profile to QFX10002 and QFX10008 switches and use non-hierarchical port scheduling. Skip to step 4 and continue.
   • Hierarchical (Fusion)—Uses hierarchical port scheduling wherein you must assign the forwarding classes to a priority group before assigning it to an interface. Select this scheduling type if you plan to assign the CoS profile to QFX10002 and QFX10008 switches and use hierarchical port scheduling.

     Note: This release of Network Director supports QFX10002 and QFX10008 switches as standalone switches and not as part of the Junos Fusion.

     Skip to step 3 and continue.

   • Non-Hierarchical— Select this scheduling type if you plan to assign the CoS profile to QFX5200 switches. Skip to step 4 and continue.
3. If you selected Hierarchical and Hierarchical (Fusion) as the port scheduling type, specify settings in the Priority Group and Traffic Settings section.

   The table lists priority groups and the forwarding classes they contain in an expandable list. Priority groups refer to forwarding class sets in the device. You can perform these tasks on priority groups and forwarding classes:

   • To add a new priority group, click Add Priority Group. The Add Priority Group and Traffic Control Profile Window opens. Enter the settings as described in Table 134.

     Table 134: Add Priority Group and Traffic Control Profile Window

     Field	Description
     Priority Group Name	Enter a name for the priority group.
     Traffic Control Profile Settings
     Transmit Rate (%)	Select a transmit rate percentage for the priority group.
     Shaping Rate (%)	Select a shaping rate percentage for the priority group.

   • To edit a priority group or forwarding class’s properties, click the field that you want to edit in the table. The properties that can be edited are described in Table 135.

     Table 135: Priority Group and Traffic Settings Table Properties

     Field	Description
     Strict High	Select to cause the forwarding class to receive preferential treatment over a low-priority queue. Unlimited bandwidth is assigned to a strict-high priority queue. Not applicable to priority groups.
     Transmit Rate (%)	Select the percentage of interface bandwidth assigned to the forwarding class or priority group. If you have enabled Strict-High, you cannot reserve bandwidth for this traffic type.
     Shaping Rate (%)	Select a shaping rate percentage for the forwarding class or priority group.

   • To edit a forwarding class’s properties, click its name. The Edit Traffic Classification and Shaping for priority group window opens. Enter the settings as described in Table 136.

     Table 136: Edit and Add Traffic Classification and Shaping for Priority Group Window

     Field	Description
     Forwarding Class Name	Select or specify a name for the forwarding class. Note: Since all queues in Hierarchical (Fusion) port scheduling can act as unicast and multicast queues, there is no separate Multicast queue in Hierarchical (Fusion) port scheduling.
     Forwarding Class Queue	Specify the internal queue numbers to which forwarding classes are assigned.
     No Loss	Select to make the forwarding class lossless. Note: No Loss does not apply to CoS profiles that you are creating for EX4500 and EX4550 devices.
     Scheduler Map
     Strict High	Select if you want the queue to receive preferential treatment over a low-priority queue. Unlimited bandwidth is assigned to a strict-high priority queue.
     Transmit Rate	Select the percentage of interface bandwidth assigned to the forwarding class. If you have enabled Strict-High, you cannot reserve bandwidth for this traffic type.
     Shaping Rate	Specify the shaping rate to throttle the rate of packet transmission by setting a maximum bandwidth (rate in bits per second) or a maximum percentage of bandwidth for a queue or a forwarding class. Note: This field is available only if you selected Hierarchical (Fusion) as the port scheduling type.
     Transmit Exact	Select to enforce the exact transmission rate or the value you configure as the transmit-rate percentage. Note: This field is not available if you selected Hierarchical (Fusion) or Non-Hierarchical (Fusion) as the port scheduling type.
     Shaping Rate	Select a shaping rate percentage for the forwarding class. Note: This field is not available if you selected Hierarchical (Fusion) or Non-Hierarchical (Fusion) as the port scheduling type.
     Buffer Size (%)	Select the percentage of the memory buffer allocated for storing packets for the forwarding class.
     Traffic Classification
     Classifier Type	Select the classifier type that maps packets to a forwarding class and a loss priority.
     Code Points	Specify one or more code-points for associating with a forwarding class.
     Loss Priority Low	Indicates that packets have low loss priority. Select code points from the Code Points table and use the LEFT and RIGHT arrows to move them into the appropriate loss priority table.
     Loss Priority Medium High	Indicates that packets have medium high loss priority. Select code points from the Code Points table and use the LEFT and RIGHT arrows to move them into the appropriate loss priority table.
     Loss Priority High	Indicates that packets have high loss priority. Select code points from the Code Points table and use the LEFT and RIGHT arrows to move them into the appropriate loss priority table.

   • To add a forwarding class to a priority group, click the Add Forwarding Class link at the end of the priority group’s list of forwarding classes. The Add Traffic Classification and Shaping for priority group window opens. Enter the settings as described in Table 136.
   • To remove a priority group or forwarding class, click the X at the end of its table row.
4. If you selected Non Hierarchical or Non Hierarchical (Fusion) Port Scheduling, specify settings in the Traffic Configuration and Shaping table.

   The table lists forwarding classes. You can perform these tasks on forwarding classes:

   • To add traffic configuration and shaping details for different types of traffic, click Add in the Traffic Configuration and Shaping box. The Add Traffic Classification and Shaping window opens.
   • To modify the details of an existing traffic configuration, select the traffic configuration from the list and click Edit. The Edit Traffic Classification and Shaping window opens.

     Note: You can modify some of the details in the Traffic Configuration and Shaping table without having to open the Edit Traffic Classification and Shaping window—by clicking the field that you want to modify.

   • To delete a traffic configuration entry, select the traffic configuration from the list and click Remove.

     The system deletes the selected traffic configuration entry.

   To create your own traffic type, click Add and then configure the settings described in Table 137.

   Table 137: Traffic Configuration and Shaping for Non-Hierarchical and Non-Hierarchical (Fusion)

   Field	Description
   Traffic Type	If you are editing a Network Director default traffic type, this field cannot be changed. If you are adding a traffic type, indicate the type of traffic—this can be any value, such as a server name or something to do with your business.
   Forwarding Name	If you are editing a Network Director default traffic type, this field cannot be changed. If you are adding a traffic type, you can use one of the predefined forwarding classes for your switch or you can create your own forwarding class. These are some of the most common forwarding classes used for data center switches: nd_dc_lan_fc, nd_dc_network-control, nd_dc_best-effort, nd_dc_no-loss, nd_dc_fcoe_fc, nd_dc_fcoend_dc_video-forwarding, nd_dc_mcast, and nd_dc_expedited-forwarding. To create your own forwarding class, type a name instead of selecting an option.
   Forwarding Queue	Existing forwarding classes already have associated queues that cannot be altered. If you defined a new forwarding class by specifying your own Forwarding Name, then select an internal queue number to which forwarding classes are assigned. Most switches support queues 0 through 8. By default, if a packet is not classified, it is assigned to the class associated with queue 0. You can assign more than one forwarding class to a queue number. Queue 8 is classified as the multicast queue. Multicast queue is not applicable for QFX10002, QFX10008, EX4500, and EX4550 switches.
   No Loss	Select to make the forwarding class lossless.
   Scheduler Map A note in the Scheduler Map section indicates how much buffer size and bandwidth you have available to configure. For example, the message “You have been left with 0 percent buffer size and 0 percent bandwidth.” means that you have no available buffer or bandwidth, and you must reconfigure existing traffic types to free some bandwidth before configuring additional traffic types.
   Low Priority	Enable Low Priority if you want the queue to receive low priority.
   Strict High Priority	Enable Strict High Priority if you want the queue to receive preferential treatment over a low-priority queue. Unlimited bandwidth is assigned to a strict-high priority queue. A strict-high priority queue receives preferential treatment over a low-priority queue. Unlimited bandwidth is assigned to a strict-high priority queue. Queues are scheduled according to the queue number, starting with the highest queue, 7, with decreasing priority down through queue 0. Traffic in higher-numbered queues is always scheduled prior to traffic in lower-numbered queues. In other words, in case of two high-priority queues, the queue with the higher queue number is processed first. Note: You can modify this field in the Traffic Configuration and Shaping table or from the Traffic Configuration and Shaping window.
   Buffer Size (%)	Buffer Size (%) is the size of the memory buffer allocated for storing packets. Use the slider to specify the scheduler Buffer Size percentage. Note: You can modify this value by double-clicking this field in the Traffic Configuration and Shaping table or by sliding the bar in the Traffic Configuration and Shaping window.
   Bandwidth Reserved (%)	Bandwidth Reserved (%) is the amount of interface bandwidth assigned to the queue. Move the slider to specify the Bandwidth Reserved percentage. Defaults are: Data: 30% Voice: Strict High Video: 70% Network control: 0% If Strict-High is enabled for this traffic type, you cannot reserve bandwidth. Note: This field displays the value based on either your input or on the transmit-rate parameter from the switch, if that parameter is configured. While specifying transmit-rate on the EX Series switch, if you choose to specify the value as an exact rate, Network Director converts this value and displays it as a percentage in the Bandwidth Reserved (%) field. You can modify this percentage value from the CoS Profile page.
   Shaping Rate	Move the Shaping Rate slider to throttle the rate of packet transmission by setting a maximum bandwidth (rate in bits per second) or a maximum percentage of bandwidth for a queue or a forwarding class. Note: This field is not available if you selected Non-Hierarchical (Fusion) as the port scheduling type.
   Transmit Exact	Select to enforce the exact transmission rate or the value you configure as the transmit-rate percentage. Note: This field is available only if you selected Non-Hierarchical (Fusion) as the port scheduling type.
   Traffic Classification Behavior aggregate classification classifies packets. The DSCP or DSCP IPv6 precedence bits of the IP header convey the behavior aggregate class information. The information might also be found in the IEEE 802.1ad, or IEEE 802.1p CoS bits.
   Classifier Type	Select a classifier type—DSCP, DSCP-IPv6, INET-precedence, or IEEE-802.1—and associate the corresponding code-point aliases to loss priorities. Note: You can specify code-point—loss priority associations for one or more classifier types. DSCP—Differentiated services code point, a field in IPv4 headers, is used to classify traffic. DSCP-IPv6—Differentiated services code point, a field in IPv6 headers, is used to classify traffic. INET precedence—Field that indicates class of service rewrite rules are used to classify traffic. IEEE-802.1—IEEE 802.1ad, or IEEE 802.1p CoS bits are used to classify traffic.
   Classifier Code Points
   Code Points	The code points list includes all available and unselected code points for the selected classifier type. Specify one or more code-point aliases or bit sets to associate with a forwarding class by moving the value to one of the two lists, Loss Priority Low or Loss Priority High.
   Loss Priority Low	Indicate that packets have low loss priority by selecting code-point aliases from the Code Points table and using the LEFT and RIGHT arrows to move them into the appropriate loss priority table.
   Loss Priority Medium-Low	Indicate that packets have medium-low loss priority by selecting code-point aliases from the Code Points table and using the LEFT and RIGHT arrows to move them into the appropriate loss priority table.
   Loss Priority Medium-High	Indicate that packets have medium-high loss priority by selecting code-point aliases from the Code Points table and using the LEFT and RIGHT arrows to move them into the appropriate loss priority table.
   Loss Priority High	Indicate that packets have high loss priority by selecting code-point aliases from the Code Points table and using the LEFT and RIGHT arrows to move them into the appropriate loss priority table.

5. Specify the priority-based flow control (PFC) settings in the PFC Settings section. PFC is a link-level flow control mechanism that allows you to selectively pause traffic according to its class instead of pausing all traffic on a link.

   Enter the settings as described in Table 138.

   Table 138: PFC Settings for Data Center Switching Hierarchical Port Scheduling (ETS) CoS Profile

   Field	Description
   Input Cable Length (meter)	Enter the length of the cable attached to the input interface, in meters.
   Input
   Add	Click to add an input congestion notification profile (CNP). A new entry appears in the table.
   Remove	Click to remove the selected input CNP.
   IEEE Code Point	Select the IEEE code point for the input CNP.
   Maximum Receive Size (bytes)	Enter the maximum receive unit (MRU) on an interface for traffic that matches the PFC priority, in bytes.
   Output Note: This section does not apply to Non-Hierarchical (EX) port scheduling.
   Add	Click to add an output CNP. A new entry appears in the table.
   Remove	Click to remove the selected output CNP.
   IEEE Code Point	Select the IEEE code point for the output CNP.
   Queue List	Select output queues on which to enable flow control (PFC pause).

6. If you selected Hierarchical or Hierarchical (Fusion) as the port scheduling type, specify rewrite rule settings in the Rewrite Rule Settings section as described in Table 139.

   Table 139: Rewrite Rule Settings for Data Center Switching CoS Profile

   Field	Description
   Forwarding Name	The name of the forwarding class.
   Queue	The number corresponding to the forwarding queue. You cannot modify this field.
   Rewrite Type	Select a rewrite-rules mapping for the traffic that passes through the various queues on the interface.
   Egress Code Point - Loss Priority Low	Specify a code-point for association with a forwarding class for loss priority low.
   Egress Code Point - Loss Priority Medium High	Specify a code-point for association with a forwarding class for loss priority medium high.
   Egress Code Point - Loss Priority High	Specify a code-point for association with a forwarding class for loss priority high.

7. If you selected Non-Hierarchical, Non-Hierarchical (Fusion), or Non-Hierarchical (EX) as the port scheduling type, click Configure Rewrite Rules at the bottom of the screen to configure rewrite rules for a forwarding queue. The Configure Rewrite Rules window appears. Specify rewrite rule settings as described below to alter CoS values in outgoing packets on the outbound interfaces of an edge switch:

   Procedure

   1. Select the forwarding class for which you want to create or modify rewrite rules. Network Director lists all the forwarding classes that you have used for configuring traffic in the Traffic Configuration and Shaping section.
   2. For each classifier’s loss priority, select a code-point alias for each loss-priority type—Low, Medium-Low, Medium-High, and High.
8. Click Done to save the changes to the profile.

What to Do Next

After you have created a CoS profile for switching devices, you can associate the CoS profile to a Port profile.

Related Documentation

• Understanding Class of Service (CoS) Profiles
• Creating and Managing Wireless CoS Profiles
• Network Director Documentation home page