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Port Speed on PTX Routers

In this topic we have information related to the port speed on a PTX routers and line cards, support for multiple port speed details, guidelines and how to configure the port speed.

Port Speed on PTX10K-LC1201

PTX10008 routers support 8 PTX10K-LC1201 line cards. Starting in Junos OS Evolved Release 20.1R2 and 20.2R1, we now support a new port profile configuration to configure port speeds on the PTX10K-LC1201 line card. You can configure the port speed on the PTX10K-LC1201 line card by using the port profile configuration commands in the [edit interfaces] hierarchy. To streamline the configuration, the new port profile configuration commands are migrated from the [edit chassis] hierarchy to the [edit interfaces] hierarchy for the PTX10K-LC1201 line card.

Starting in Junos OS Evolved Release 20.4R1, you can configure 10Gbps speed and select the wavelength with SFP+ optics by plugging in the QSA adapter on the QSFP/QSFP+ ports of PTX10K-LC1201 line card. You can now configure the 10Gbps speed by using the set interfaces et-<fpc>/<pic>/<port> speed <10g> or set interfaces et-<fpc>/<pic>/<port> speed <10g> number-of-sub-ports (1) commands. You can select the wavelength of the SFP+ ports by using the set interfaces et-<fpc>/<pic>/<port>:channel number optics-options wavelength wavelength command and view the output using the show interfaces diagnostics optics name command.

For information on the line card, see PTX10K-LC1201-36D for PTX10008 Routers.

To view the supported transceivers, optical interfaces, and DAC cables on PTX10K-LC1201, see Hardware Compatibility Tool (HCT).

Table 1 summarizes the line card details and their description.

Table 1: PTX10K-LC1201 Software Support and Description

Software Feature Support

Description

Forward Error Correction (FEC)

  • By default, 200-Gigabit Ethernet interfaces and 400-Gigabit Ethernet interfaces support KP4 FEC mode. You cannot disable FEC mode explicitly.

  • FEC mode is based on the type of optics connected. With non juniper optics, you can enable FEC mode by manually configuring it. When you manually configure the FEC mode, all the interfaces on a port must be configured with same FEC mode. For example, for a 4x100-Gigabit Ethernet configuration mode, each of the four 100-Gigabit Ethernet interfaces must be configured with either all FEC74 or all FEC91-KR4 mode.

Maximum Transmission Unit (MTU) Size

Maximum MTU of size 16000 bytes for transit traffic. Ingress interface limits is 9000 bytes.

Port Speed Configuration

  • For Junos OS Evolved Releases 19.4R1S1 and 20.1R1, you can configure the port speed at the [edit chassis ] hierarchy.

  • For Junos OS Evolved Releases 20.1R2, 20.2R1, and later, you can configure the port speed at the [edit interfaces] hierarchy.

When you change the speed of the port, or change the number-of-sub-ports per port, or configure or remove the number-of-sub-ports, the interfaces will be deleted and re-created for that port.

Table 2: Port Speed for PTX10K-LC1201

PIC

Port Number

Port Speeds Supported

PIC 0

0-35

1x10-Gigabit Ethernet

4x10-Gigabit Ethernet

1x40-Gigabit Ethernet

4x25-Gigabit Ethernet

8x25-Gigabit Ethernet

2x50-Gigabit Ethernet

1x100-Gigabit Ethernet

2x100-Gigabit Ethernet

4x100-Gigabit Ethernet

1x400-Gigabit Ethernet

Default: All the active ports operate in 400-Gigabit Ethernet mode.

You can configure the active physical ports in a PIC. By default, all the physical ports in an interface are active. Use the unused command to control the number of interfaces created on a physical port in a PIC. If you configure a port as unused, no interfaces (channelized or non-channelized) are created for that port.

On channelized interfaces, the prefix et- is used irrespective of the speed you configure. All channelized interfaces have the same speed. You cannot configure an individual speed for each channelized interface. You can configure the number of channelized interfaces by using the number-of-sub-ports command. On non-channelized interfaces, the prefix et- is used irrespective of the speed configured. If you do not configure the speed, by using the optional speed command, default speed is assigned to the interface.

Table 3: Interface Naming Convention for PTX10K-LC1201 line card (PTX10008 router)

PIC

10-Gigabit Ethernet Interface

25-Gigabit Ethernet Interface

40-Gigabit Ethernet Interface

50-Gigabit Ethernet Interface

100-Gigabit Ethernet Interface

200-Gigabit Ethernet Interface

400-Gigabit Ethernet Interface

PIC 0

et-x/0/0:[0-7]

et-x/0/0:[0-7]

et-x/0/0

et-x/0/0:[0-7]

et-x/0/0

et-x/0/0:[0-1]

et-x/0/0:[0-3]

et-x/0/0:[0-2]

et-x/0/0

et-x/0/1:[0-7]

et-x/0/1:[0-7]

et-x/0/1

et-x/0/1:[0-7]

et-x/0/1

et-x/0/1:[0-1]

et-x/0/1:[0-3]

et-x/0/1:[0-2]

et-x/0/1

et-x/0/2:[0-7]

et-x/0/2:[0-7]

et-x/0/2

et-x/0/2:[0-7]

et-x/0/2

et-x/0/2:[0-1]

et-x/0/2:[0-3]

et-x/0/2:[0-2]

et-x/0/2

et-x/0/3:[0-7]

et-x/0/3:[0-7]

et-x/0/3

et-x/0/3:[0-7]

et-x/0/3

et-x/0/3:[0-1]

et-x/0/3:[0-3]

et-x/0/3:[0-2]

et-x/0/3

et-x/0/4:[0-7]

et-x/0/4:[0-7]

et-x/0/4

et-x/0/4:[0-7]

et-x/0/4

et-x/0/4:[0-1]

et-x/0/4:[0-3]

et-x/0/4:[0-2]

et-x/0/4

et-x/0/5:[0-7]

et-x/0/5:[0-7]

et-x/0/5

et-x/0/5:[0-7]

et-x/0/5

et-x/0/5:[0-1]

et-x/0/5:[0-3]

et-x/0/5:[0-2]

et-x/0/5

et-x/0/6:[0-7]

et-x/0/6:[0-7]

et-x/0/6

et-x/0/6:[0-7]

et-x/0/6

et-x/0/6:[0-1]

et-x/0/6:[0-3]

et-x/0/6:[0-2]

et-x/0/6

et-x/0/7:[0-7]

et-x/0/7:[0-7]

et-x/0/7

et-x/0/7:[0-7]

et-x/0/7

et-x/0/7:[0-1]

et-x/0/7:[0-3]

et-x/0/7:[0-2]

et-x/0/7

et-x/0/8:[0-7]

et-x/0/8:[0-7]

et-x/0/8

et-x/0/8:[0-7]

et-x/0/8

et-x/0/8:[0-1]

et-x/0/8:[0-3]

et-x/0/8:[0-2]

et-x/0/8

et-x/0/9:[0-7]

et-x/0/9:[0-7]

et-x/0/9

et-x/0/9:[0-7]

et-x/0/9

et-x/0/9:[0-1]

et-x/0/9:[0-3]

et-x/0/9:[0-2]

et-x/0/9

et-x/0/10:[0-7]

et-x/0/10:[0-7]

et-x/0/10

et-x/0/10:[0-7]

et-x/0/10

et-x/0/10:[0-1]

et-x/0/10:[0-3]

et-x/0/10:[0-2]

et-x/0/10

et-x/0/11:[0-7]

et-x/0/11:[0-7]

et-x/0/11

et-x/0/11:[0-7]

et-x/0/11

et-x/0/11:[0-1]

et-x/0/11:[0-3]

et-x/0/11:[0-2]

et-x/0/11

et-x/0/12:[0-7]

et-x/0/12:[0-7]

et-x/0/12

et-x/0/12:[0-7]

et-x/0/12

et-x/0/12:[0-1]

et-x/0/12:[0-3]

et-x/0/12:[0-2]

et-x/0/12

et-x/0/13:[0-7]

et-x/0/13:[0-7]

et-x/0/13

et-x/0/13:[0-7]

et-x/0/13

et-x/0/13:[0-1]

et-x/0/13:[0-3]

et-x/0/13:[0-2]

et-x/0/13

et-x/0/14:[0-7]

et-x/0/14:[0-7]

et-x/0/14

et-x/0/14:[0-7]

et-x/0/14

et-x/0/14:[0-1]

et-x/0/14:[0-3]

et-x/0/14:[0-2]

et-x/0/14

et-x/0/15:[0-7]

et-x/0/15:[0-7]

et-x/0/15

et-x/0/15:[0-7]

et-x/0/15

et-x/0/15:[0-1]

et-x/0/15:[0-3]

et-x/0/15:[0-2]

et-x/0/15

et-x/0/16:[0-7]

et-x/0/16:[0-7]

et-x/0/16

et-x/0/16:[0-7]

et-x/0/16

et-x/0/16:[0-1]

et-x/0/16:[0-3]

et-x/0/16:[0-2]

et-x/0/16

et-x/0/17:[0-7]

et-x/0/17:[0-7]

et-x/0/17

et-x/0/17:[0-7]

et-x/0/17

et-x/0/17:[0-1]

et-x/0/17:[0-3]

et-x/0/17:[0-2]

et-x/0/17

et-x/0/18:[0-7]

et-x/0/18:[0-7]

et-x/0/18

et-x/0/18:[0-7]

et-x/0/18

et-x/0/18:[0-1]

et-x/0/18:[0-3]

et-x/0/18:[0-2]

et-x/0/18

et-x/0/19:[0-7]

et-x/0/19:[0-7]

et-x/0/19

et-x/0/19:[0-7]

et-x/0/19

et-x/0/19:[0-1]

et-x/0/19:[0-3]

et-x/0/19:[0-2]

et-x/0/19

et-x/0/20:[0-7]

et-x/0/20:[0-7]

et-x/0/20

et-x/0/20:[0-7]

et-x/0/20

et-x/0/20:[0-1]

et-x/0/20:[0-3]

et-x/0/20:[0-2]

et-x/0/20

et-x/0/21:[0-7]

et-x/0/21:[0-7]

et-x/0/21

et-x/0/21:[0-7]

et-x/0/21

et-x/0/21:[0-1]

et-x/0/21:[0-3]

et-x/0/21:[0-2]

et-x/0/21

et-x/0/22:[0-7]

et-x/0/22:[0-7]

et-x/0/22

et-x/0/22:[0-7]

et-x/0/22

et-x/0/22:[0-1]

et-x/0/22:[0-3]

et-x/0/22:[0-2]

et-x/0/22

et-x/0/23:[0-7]

et-x/0/23:[0-7]

et-x/0/23

et-x/0/23:[0-7]

et-x/0/23

et-x/0/23:[0-1]

et-x/0/23:[0-3]

et-x/0/23:[0-2]

et-x/0/23

et-x/0/24:[0-7]

et-x/0/24:[0-7]

et-x/0/24

et-x/0/24:[0-7]

et-x/0/24

et-x/0/24:[0-1]

et-x/0/24:[0-3]

et-x/0/24:[0-2]

et-x/0/24

et-x/0/25:[0-7]

et-x/0/25:[0-7]

et-x/0/25

et-x/0/25:[0-7]

et-x/0/25

et-x/0/25:[0-1]

et-x/0/25:[0-3]

et-x/0/25:[0-2]

et-x/0/25

et-x/0/26:[0-7]

et-x/0/26:[0-7]

et-x/0/26

et-x/0/26:[0-7]

et-x/0/26

et-x/0/26:[0-1]

et-x/0/26:[0-3]

et-x/0/26:[0-2]

et-x/0/26

et-x/0/27:[0-7]

et-x/0/27:[0-7]

et-x/0/27

et-x/0/27:[0-7]

et-x/0/27

et-x/0/27:[0-1]

et-x/0/27:[0-3]

et-x/0/27:[0-2]

et-x/0/27

et-x/0/28:[0-7]

et-x/0/28:[0-7]

et-x/0/28

et-x/0/28:[0-7]

et-x/0/28

et-x/0/28:[0-1]

et-x/0/28:[0-3]

et-x/0/28:[0-2]

et-x/0/28

et-x/0/29:[0-7]

et-x/0/29:[0-7]

et-x/0/29

et-x/0/29:[0-7]

et-x/0/29

et-x/0/29:[0-1]

et-x/0/29:[0-3]

et-x/0/29:[0-2]

et-x/0/29

et-x/0/30:[0-7]

et-x/0/30:[0-7]

et-x/0/30

et-x/0/30:[0-7]

et-x/0/30

et-x/0/30:[0-1]

et-x/0/30:[0-3]

et-x/0/30:[0-2]

et-x/0/30

et-x/0/31:[0-7]

et-x/0/31:[0-7]

et-x/0/31

et-x/0/31:[0-7]

et-x/0/31

et-x/0/31:[0-1]

et-x/0/31:[0-3]

et-x/0/31:[0-2]

et-x/0/31

et-x/0/32:[0-7]

et-x/0/32:[0-7]

et-x/0/32

et-x/0/32:[0-7]

et-x/0/32

et-x/0/32:[0-1]

et-x/0/32:[0-3]

et-x/0/32:[0-2]

et-x/0/32

et-x/0/33:[0-7]

et-x/0/33:[0-7]

et-x/0/33

et-x/0/33:[0-7]

et-x/0/33

et-x/0/33:[0-1]

et-x/0/33:[0-3]

et-x/0/33:[0-2]

et-x/0/33

et-x/0/34:[0-7]

et-x/0/34:[0-7]

et-x/0/34

et-x/0/34:[0-7]

et-x/0/34

et-x/0/34:[0-1]

et-x/0/34:[0-3]

et-x/0/34:[0-2]

et-x/0/34

et-x/0/35:[0-7]

et-x/0/35:[0-7]

et-x/0/35

et-x/0/35:[0-7]

et-x/0/35

et-x/0/35:[0-1]

et-x/0/35:[0-3]

et-x/0/35:[0-2]

et-x/0/35

For information about how to configure the speed of a port for a non-channelized interface using the new interfaces hierarchy, see Configure Port Speed for Non-Channelized Interfaces. For information about how to configure the speed of a port for a channelized interface using the new interfaces hierarchy, see Configure Port Speed for Channelized Interfaces.

Port Speed on PTX10001-36MR Router

For information on PTX10001-36MR hardware description, see PTX10001-36MR Packet Transport Router Hardware Guide.

To view the supported transceivers, optical interfaces, and DAC cables on PTX10001-36MR, see Hardware Compatibility Tool (HCT).

Table 4 provides the basic details of PTX10001-36MR router.

Table 4: PTX10001-36MR Router Details and Description

Details

Description

PIC Level or Port Level Configuration

Only port level speed configuration is supported.

Port speed configuration:

Supports only [edit interfaces interface-name] hierarchy from Junos OS Evolved Release 20.3R1 onwards.

Supports [edit chassis] hierarchy in Junos OS Evolved 20.2 releases.

MTU size

PTX10001-36MR router WAN interfaces support maximum MTU of size 16000 bytes for transit traffic. However for the traffic that is destined to host or is originating from host (such as protocol traffic), the maximum MTU limit is 9500 bytes. If any of the host bound packets or host originating packet is above 9500 bytes, then the packet will be dropped. Hence, if you are expecting host packets greater than 9500 bytes, then the WAN interface MTU value must be set as value less than or equal to 9500 bytes.

Forward Error Correction (FEC) support

  • By default, KP4 FEC is enabled on 400 and 200-Gigabit Ethernet interfaces.

    Since it is mandatory to enable KP4 FEC option for 200 and 400-Gigabit Ethernet interfaces, you cannot disable KP4 FEC explicitly.

  • The FEC mode is based on the type of optics connected, but it in some cases (with non juniper optics) can be enabled through manual configuration as well. In such case, all the interfaces on a port must be configured with same FEC mode. For example, for a 4x100-Gigabit Ethernet configuration mode, each of the four 100-Gigabit Ethernet interfaces must be configured with either all FEC74 or all FEC91-KR4 mode.

For information about FEC support, see fec (gigether).

Table 5: Speed Capability of Ports

Port numbers (PIC/Port Format)

Speed capability

0/0, 0/1, 0/2, 0/3, 0/8, 0/9, 0/10, 0/11

1/0, 1/1, 1/2, 1/3, 1/8, 1/9, 1/10, 1/11

2/0, 2/1, 2/2, 2/3, 2/8, 2/9, 2/10, 2/11

400-Gbps

0/4, 0/5, 0/6, 0/7

1/4, 1/5, 1/6, 1/7

2/4, 2/5, 2/6, 2/7

100-Gbps

If the number-of-sub-ports, do not match the type of optic connected and the configuration is invalid, then even though the interfaces are created, the links would remain down. A syslog entry will be added indicating usage of the wrong optic type.

Table 6: Channelization and FEC support on 400- and 200-Gigabit Ethernet capable ports

Speed Supported

You can channelize to:

400-Gigabit Ethernet capable ports

  • One or two 200-Gigabit Ethernet interfaces (1x200G or 2x200G)

  • Four 100-Gigabit Ethernet interfaces or two 100-Gigabit Ethernet interfaces (4x100G or 2x100G)

  • Two 50-Gigabit Ethernet interfaces or eight 50-Gigabit Ethernet interfaces (2x50G or 8x50G)

  • Four 25-Gigabit Ethernet interfaces or eight 25-Gigabit Ethernet interfaces (4x25G or 8x25G)

  • One 40-Gigabit Ethernet interface (1x40G)

  • Four 10-Gigabit Ethernet interfaces (4x10G)

100-Gigabit Ethernet capable ports

You can configure all four 100-Gigabit Ethernet capable ports (ports 4, 5, 6, and 7) to operate at 100-Gbps speeds.

Note that, you can configure port 4 and port 6 to operate at 1x100-Gbps, 4x10-Gbps, 4x25-Gbps, or 1x40-Gbps speeds with the following conditions:

  • When port 4 is configured in 4x10-Gbps, 4x25-Gbps, or 1x40-Gbps, then port 5 must be configured as 'unused'.

  • When port 6 is configured in 4x10-Gbps, 4x25-Gbps, or 1x40-Gbps, then port 7 must be configured as 'unused'.

Starting in Junos OS Evolved Release 20.3R1, you can configure the port speed on the PTX10001-36MR router by using the port profile configuration commands in the [edit interfaces] hierarchy. To streamline the configuration, the port profile configuration commands are migrated from the [edit chassis] hierarchy to the [edit interfaces] hierarchy for the PTX10001-36MR router.

From Junos OS Evolved Release 21.2R1, we support autonegotiation and linktraining using 400G DAC cable for PTX10001-36MR. This is not a default behavior. Use auto-negotiation under [edit interfaces interface-name ether-options] hierarchy level to enable autonegotiation and link training. Enabling autonegotiation automatically enables link training. This advertises configured speed on the interface hierarchy. It does not upgrade or downgrade speed based on peers advertised capability.

Autonegotiation and link training is supported only on the following channelization:

  • One 400-Gigabit Ethernet interfaces (1x400G)
  • Two 200-Gigabit Ethernet interfaces (2x200G)
  • Four 100-Gigabit Ethernet interfaces (4x100G)

Configure speed at Port Level

To configure the PTX10001-36MR router at port level, follow the configuration steps in Configure Port Speed - Port Level in 20.2 releases. See speed for more details.

From Junos OS Evolved Release 20.3R1 you must use, set interfaces et-<fpc>/<pic>/<port> speed <10g | 25g | 50g | 40g | 100g | 200g | 400g>, or set interfaces et-<fpc>/<pic>/<port> speed <10g | 25g | 50g | 40g | 100g | 200g | 400g> number-of-sub-ports (1|2|4|8) commands to configure the speed on the ports.

You can configure port profiles in the command line interface without the physical presence of an FPC. If an invalid port profile configuration is detected while booting a FPC, an alarm is generated. Also, the default port profile is selected for that PIC.

If the port profile configuration is changed while the FPC is up and running, and the new configuration is invalid, an alarm is generated. The existing port profile configured continues to be used for that PIC.

You can configure any supported speed on 400-Gbps capable ports. Configuring speed on one of the 400-Gbps capable port will not disrupt the traffic on any other ports.

But, for 100-Gbps capable ports only speeds of 100-Gbps, 25-Gbps, 40-Gbps, and 10-Gbps are valid.

From Junos OS Evolved Release 20.3R1 you must use, the following command:

set interfaces et-<fpc>/<pic>/<port> unused

If you configure request security system-keystore unlink command for a physical port in a PIC, then no channelized and non-channelized interfaces will be created. See request security system-keystore unlink for more information.

The Table 9 specifies which ports must be marked unused. If this rule is violated, then an alarm indicating port speed configuration error is raised. In such case, the existing running configuration will continue to be applied on such ports.

If the router reboots with such an invalid configuration, then the port with 40-Gbps, 4x10-Gbps, or 4x25-Gbps speed configuration and its counterpart port will not have any interfaces created for them.

Table 7 provides you the ports that you must power-off while configuring different speeds.

Table 7: Unused Port Settings

Port Speed

Valid ports to set the Port Speed

Ports you must explicitly power off (FPC/PIC/Port)

100-Gbps

All 100G capable ports can operate that 100-Gbps speed. You are not required to power off any 100G cable ports, in this case.

NA

40-Gbps, 25-Gbps, and 10-Gbps

0/0/4 and 0/0/6

0/1/4 and 0/1/6

0/2/4 and 0/2/6

0/0/5 and 0/0/7

0/1/5 and 0/1/7

0/2/5 and 0/2/7

Note:

You can configure a port with more than one type of channelization mode for a given speed. For example, you can channelize a port to 1x100-Gbps, 2x100-Gbps, or 4x100-Gbps to configure the port to operate in 100-Gbps speed.

From Junos OS Evolved Release 20.3R1 to specify which of these channelization modes on the ports, you must execute the following command at the [edit interfaces] hierarchy:

set interfaces et-<fpc>/<pic>/<port> speed <10g | 25g | 50g | 40g | 100g | 200g | 400g> number-of-sub-ports (1|2|4|8)

See number-of-sub-ports (interface) for information on how to operate at different channelized speed.

When the number-of-sub-ports are not specified, the number of channels are created as per Table 8:

Table 8: Number of sub-ports supported for a particular speed

Port speed

Valid values for number-of-sub-ports

200-Gbps

1, 2

100-Gbps

QSFP56-DD-400G-ZR-M and QSFP56-DD-400G-ZR-M-HP support 3x100G channelisation.

1, 2, 4

3

40-Gbps

1

50-Gbps

2, 8

25-Gbps

4, 8

10-Gbps

4

  • The router has a fabric capacity of 9.6 Tbps. When the router operates in 24 400 Gigabit Ethernet mode, the fabric does not experience an oversubscription. The oversubscription occurs when the router is configured in 24 400-Gigabit Ethernet and 12 100-Gigabit Ethernet modes. To avoid oversubscription of a PIC, the sum of the total speed configured on ports 4 to 11 within the PIC must be less than 1.6 Tbps.
Table 9: Interface Naming Convention for PTX10001-36MR Router

PIC

4x100-Gigabit Ethernet Interface

4x10-Gigabit Ethernet Interface

4x25-Gigabit Ethernet Interface

2x100-Gigabit Ethernet Interface

2x50-Gigabit Ethernet Interface

2x200-Gigabit Ethernet Interface

8x25-Gigabit Ethernet Interface

8x50-Gigabit Ethernet Interface

1x400-Gigabit Ethernet Interface

1x200-Gigabit Ethernet Interface

1x100-Gigabit Ethernet Interface

1x40-Gigabit Ethernet Interface

0

et-0/0/0:[0-3]

et-0/0/0:[0-3]

et-0/0/0:[0-1]

et-0/0/0:[0-7]

et-0/0/0

et-0/0/0

et-0/0/0

et-0/0/1:[0-3]

et-0/0/1:[0-3]

et-0/0/1:[0-1]

et-0/0/1:[0-7]

et-0/0/1

et-0/0/1

et-0/0/1

et-0/0/2:[0-3]

et-0/0/2:[0-3]

et-0/0/2:[0-1]

et-0/0/2:[0-7]

et-0/0/2

et-0/0/2

et-0/0/2

et-0/0/3:[0-3]

et-0/0/3:[0-3]

et-0/0/3:[0-1]

et-0/0/3:[0-7]

et-0/0/3

et-0/0/3

et-0/0/3

Unsupported

et-0/0/4:[0-3]

Unsupported

Unsupported

Unsupported

et-0/0/4

et-0/0/4

Unsupported

Unused

Unsupported

Unsupported

Unsupported

et-0/0/5

Unused

Unsupported

et-0/0/6:[0-3]

Unsupported

Unsupported

Unsupported

et-0/0/6

et-0/0/6

Unsupported

Unused

Unsupported

Unsupported

Unsupported

et-0/0/7

Unused

et-0/0/8:[0-3]

et-0/0/8:[0-3]

et-0/0/8:[0-1]

et-0/0/8:[0-7]

et-0/0/8

et-0/0/8

et-0/0/8

et-0/0/9:[0-3]

et-0/0/9:[0-3]

et-0/0/9:[0-1]

et-0/0/9:[0-7]

et-0/0/9

et-0/0/9

et-0/0/9

et-0/0/10:[0-3]

et-0/0/10:[0-3]

et-0/0/10:[0-1]

et-0/0/10:[0-7]

et-0/0/10

et-0/0/10

et-0/0/10

et-0/0/11:[0-3]

et-0/0/11:[0-3]

et-0/0/11:[0-1]

et-0/0/11:[0-7]

et-0/0/11

et-0/0/11

et-0/0/11

1

et-0/1/0:[0-3]

et-0/1/0:[0-3]

et-0/1/0:[0-1]

et-0/1/0:[0-7]

et-0/1/0

et-0/1/0

et-0/1/0

et-0/1/1:[0-3]

et-0/1/1:[0-3]

et-0/1/1:[0-1]

et-0/1/1:[0-7]

et-0/1/1

et-0/1/1

et-0/1/1

et-0/1/2:[0-3]

et-0/1/2:[0-3]

et-0/1/2:[0-1]

et-0/1/2:[0-7]

et-0/1/2

et-0/1/2

et-0/1/2

et-0/1/3:[0-3]

et-0/1/3:[0-3]

et-0/1/3:[0-1]

et-0/1/3:[0-7]

et-0/1/3

et-0/1/3

et-0/1/3

Unsupported

et-0/1/4:[0-3]

Unsupported

Unsupported

Unsupported

et-0/1/4

et-0/1/4

Unsupported

Unused

Unsupported

Unsupported

Unsupported

et-0/1/5

Unused

Unsupported

et-0/1/6:[0-3]

Unsupported

Unsupported

Unsupported

et-0/1/6

et-0/1/6

Unsupported

Unused

Unsupported

Unsupported

Unsupported

et-0/1/7

Unused

et-0/1/8:[0-3]

et-0/1/8:[0-3]

et-0/1/8:[0-1]

et-0/1/8:[0-7]

et-0/1/8

et-0/1/8

et-0/1/8

et-0/1/9:[0-3]

et-0/1/9:[0-3]

et-0/1/9:[0-1]

et-0/1/9:[0-7]

et-0/1/9

et-0/1/9

et-0/1/9

et-0/1/10:[0-3]

et-0/1/10:[0-3]

et-0/1/10:[0-1]

et-0/1/10:[0-7]

et-0/1/10

et-0/1/10

et-0/1/10

et-0/1/11:[0-3]

et-0/1/11:[0-3]

et-0/1/11:[0-1]

et-0/1/11:[0-7]

et-0/1/11

et-0/1/11

et-0/1/11

2

et-0/2/0:[0-3]

et-0/2/0:[0-3]

et-0/2/0:[0-1]

et-0/2/0:[0-7]

et-0/2/0

et-0/2/0

et-0/2/0

et-0/2/1:[0-3]

et-0/2/1:[0-3]

et-0/2/1:[0-1]

et-0/2/1:[0-7]

et-0/2/1

et-0/2/1

et-0/2/1

et-0/2/2:[0-3]

et-0/2/2:[0-3]

et-0/2/2:[0-1]

et-0/2/2:[0-7]

et-0/2/2

et-0/2/2

et-0/2/2

et-0/2/3:[0-3]

et-0/2/3:[0-3]

et-0/2/3:[0-1]

et-0/2/3:[0-7]

et-0/2/3

et-0/2/3

et-0/2/3

Unsupported

et-0/2/4:[0-3]

Unsupported

Unsupported

Unsupported

et-0/2/4

et-0/2/4

Unsupported

Unused

Unsupported

Unsupported

Unsupported

et-0/2/5

Unused

Unsupported

et-0/2/6:[0-3]

Unsupported

Unsupported

Unsupported

et-0/2/6

et-0/2/6

Unsupported

Unused

Unsupported

Unsupported

Unsupported

et-0/2/7

Unused

et-0/2/8:[0-3]

et-0/2/8:[0-3]

et-0/2/8:[0-1]

et-0/2/8:[0-7]

et-0/2/8

et-0/2/8

et-0/2/8

et-0/2/9:[0-3]

et-0/2/9:[0-3]

et-0/2/9:[0-1]

et-0/2/9:[0-7]

et-0/2/9

et-0/2/9

et-0/2/9

et-0/2/10:[0-3]

et-0/2/10:[0-3]

et-0/2/10:[0-1]

et-0/2/10:[0-7]

et-0/2/10

et-0/2/10

et-0/2/10

et-0/2/11:[0-3]

et-0/2/11:[0-3]

et-0/2/11:[0-1]

et-0/2/11:[0-7]

et-0/2/11

et-0/2/11

 

For information about how to configure the speed of a port for a non-channelized interface using the new interfaces hierarchy, see Configure Port Speed for Non-Channelized Interfaces. For information about how to configure the speed of a port for a channelized interface using the new interfaces hierarchy, see Configure Port Speed for Channelized Interfaces.

Port Speed on PTX10K-LC1202-36MR

PTX10K-LC1202-36MR is a new fixed-configuration line card with 36 built-in ports which you can install in PTX10008 routers. On the PTX10K-LC1202-36MR, you can choose to configure the line card:

  • To operate at 3.6T mode, configure all the 36 ports to 100-Gbps speed, or

  • To operate at 4.8T mode, configure the four 400 GE ports (4, 10, 24, and 30) to operate at 400-Gbps speed and the remaining ports to operate at 100-Gbps speed.

For information on the line card, see PTX10008 Line Card Components and Descriptions.

To view the supported transceivers, optical interfaces, and DAC cables on PTX10K-LC1202-36MR, see Hardware Compatibility Tool (HCT).

Table 10: Port Speed for PTX10K-LC1202-36MR for PTX10008 Routers

PIC

Port Number

Port Speed Supported

PIC 0 (Logical PIC)

400G capable ports - 4, 10, 24, and 30

400-Gigabit Ethernet

4x100-Gigabit Ethernet

2x100-Gigabit Ethernet

40-Gigabit Ethernet

4x10-Gigabit Ethernet

8x25-Gigabit Ethernet

10-Gigabit Ethernet

Default Speed: 400-Gigabit Ethernet

100G capable ports - 0 - 35

100-Gigabit Ethernet

4x25-Gigabit Ethernet

4x10-Gigabit Ethernet

40-Gigabit Ethernet

10-Gigabit Ethernet

Default Speed: 100-Gigabit Ethernet

Configure Port Speed for Non-Channelized Interfaces and Configure Port Speed for Channelized Interfaces describes the steps to configure the port speed for channelized and non-channelized interfaces from the [edit interfaces] hierarchy.

To configure ports at different speed, use the set interfaces et-<fpc>/<pic>/<port> speed <10g | 25g | 40g | 100g | 400g> number-of-sub-ports <1|2|4|8> command.

For the steps to configure the port speed from the [edit interfaces] hierarchy. See speed for more details.

To channelize an interface, use the number-of-sub-ports command. The number-of-sub-ports specifies the number of channelized interfaces that you can configure on a physical port with the specified speed. Each channel operates at the specified speed. The default value of number-of-sub-ports per optics is 1. See number-of-sub-ports.

When the number-of-sub-ports are not specified, the number of channels are created as per Table 11:

Table 11: Number of sub-ports supported for a particular speed

Port speed

Valid values for number-of-sub-ports

400-Gbps

1

100-Gbps

1, 2, 4

40-Gbps

1

25-Gbps

4, 8

10-Gbps

1, 4

You can configure channelization on port 0 to port 3 and port 18 to port 21 with the following guidelines:

  • The 1x10-Gigabit Ethernet, 4x10-Gigabit Ethernet or 1x40-Gigabit Ethernet and 4x25-Gigabit Ethernet channelization is supported only on even numbered ports (that is, 0, 2, 18, 20).

  • When the even port x is channelized, you must set the odd port x+1 as unused. You must explicitly configure the ports that must be set as unused, using the following command:

    set interface et-<fpc>/<pic>/<port> unused

  • You cannot configure 1x10-Gigabit Ethernet, 4x10-Gigabit Ethernet or 1x40-Gigabit Ethernet and 4x25-Gigabit Ethernet simultaneously on the following ports:

    • port 0 and 2

    • port 18 and 20

You can configure port profiles in the command line interface without the physical presence of an FPC. If an invalid port profile configuration is detected while booting a FPC, an alarm is generated. Also, the default port profile is selected for that PIC.

If the port profile configuration is changed while the FPC is up and running, and the new configuration is invalid, an alarm is generated. The existing port profile configured continues to be used for that PIC.

To configure FEC mode, see fec (gigether).

You can configure every interface to loopback mode, see loopback.

Table 12 lists the naming conventions used for interfaces on PTX10K-LC1202-36MR (for 100-Gbps, 2x100-Gbps, 400-Gpbs, and 4x100-Gbps speeds) for PTX10008 routers. PTX10008 routers support eight PTX10K-LC1202-36MR line cards.

Table 12: Interface Naming Convention for PTX10K-LC1202-36MR line card for PTX10008 Routers - Speeds 100-Gbps, 2x100-Gbps, 400-Gpbs, and 4x100-Gbps

PIC

100-Gigabit Ethernet Interface

2x100-Gigabit Ethernet Interface

400-Gigabit Ethernet Interface

4x100-Gigabit Ethernet Interface

PIC 0

et-x/0/0

Not Supported

Not Supported

Not Supported

et-x/0/1

Not Supported

Not Supported

Not Supported

et-x/0/2

Not Supported

Not Supported

Not Supported

et-x/0/3

Not Supported

Not Supported

Not Supported

et-x/0/4

et-x/0/4:[0-1]

et-x/0/4

et-x/0/4:[0-3]

et-x/0/5

Not Supported

Not Supported

Not Supported

et-x/0/6

Not Supported

Not Supported

Not Supported

et-x/0/7

Not Supported

Not Supported

Not Supported

et-x/0/8

Not Supported

Not Supported

Not Supported

et-x/0/9

Not Supported

Not Supported

Not Supported

et-x/0/10

et-x/0/10:[0-1]

et-x/0/10

et-x/0/10:[0-3]

et-x/0/11

Not Supported

Not Supported

Not Supported

et-x/0/12

Not Supported

Not Supported

Not Supported

et-x/0/13

Not Supported

Not Supported

Not Supported

et-x/0/14

Not Supported

Not Supported

Not Supported

et-x/0/15

Not Supported

Not Supported

Not Supported

et-x/0/16

Not Supported

Not Supported

Not Supported

et-x/0/17

Not Supported

Not Supported

Not Supported

et-x/0/18

Not Supported

Not Supported

Not Supported

et-x/0/19

Not Supported

Not Supported

Not Supported

et-x/0/20

Not Supported

Not Supported

Not Supported

et-x/0/21

Not Supported

Not Supported

Not Supported

et-x/0/22

Not Supported

Not Supported

Not Supported

et-x/0/23

Not Supported

Not Supported

Not Supported

et-x/0/24

et-x/0/24:[0-1]

et-x/0/24

et-x/0/24:[0-3]

et-x/0/25

Not Supported

Not Supported

Not Supported

et-x/0/26

Not Supported

Not Supported

Not Supported

et-x/0/27

Not Supported

Not Supported

Not Supported

et-x/0/28

Not Supported

Not Supported

Not Supported

et-x/0/29

Not Supported

Not Supported

Not Supported

et-x/0/30

et-x/0/30:[0-1]

et-x/0/30

et-x/0/30:[0-3]

et-x/0/31

Not Supported

Not Supported

Not Supported

et-x/0/32

Not Supported

Not Supported

Not Supported

et-x/0/33

Not Supported

Not Supported

Not Supported

et-x/0/34

Not Supported

Not Supported

Not Supported

et-x/0/35

Not Supported

Not Supported

Not Supported

Table 13 lists the naming conventions used for interfaces on PTX10K-LC1202-36MR (for 10-Gbps, 4x10-Gbps, 40-Gbps, 4x25-Gbps, and 8x25-Gbps speeds) for PTX10008 routers. PTX10008 routers support eight PTX10K-LC1202-36MR line cards.

Table 13: Interface Naming Convention for PTX10K-LC1202-36MR line card for PTX10008 Routers - Speeds 10-Gbps, 4x10-Gbps, 4x25-Gbps, and 8x25-Gbps

PIC

10-Gigabit Ethernet Interface

4x10-Gigabit Ethernet Interface

40-Gigabit Ethernet Interface

4x25-Gigabit Ethernet Interface

8x25-Gigabit Ethernet Interface

PIC 0

et-x/0/0

et-x/0/0:[0-3]

et-x/0/0

et-x/0/0:[0-3]

Not Supported

Not Supported

Not Supported

Not Supported

Not Supported

Not Supported

et-x/0/2

et-x/0/2:[0-3]

et-x/0/2

et-x/0/2:[0-3]

Not Supported

Not Supported

Not Supported

Not Supported

Not Supported

Not Supported

et-x/0/4

et-x/0/4:[0-3]

et-x/0/4

et-x/0/4:[0-3]

et-x/0/4:[0-7]

et-x/0/5

et-x/0/5:[0-3]

et-x/0/5

et-x/0/5:[0-3]

Not Supported

et-x/0/6

et-x/0/6:[0-3]

et-x/0/6

et-x/0/6:[0-3]

Not Supported

et-x/0/7

et-x/0/7:[0-3]

et-x/0/7

et-x/0/7:[0-3]

Not Supported

et-x/0/8

et-x/0/8:[0-3]

et-x/0/8

et-x/0/8:[0-3]

Not Supported

et-x/0/9

et-x/0/9:[0-3]

et-x/0/9

et-x/0/9:[0-3]

Not Supported

et-x/0/10

et-x/0/10:[0-3]

et-x/0/10

et-x/0/10:[0-3]

et-x/0/10:[0-7]

et-x/0/11

et-x/0/11:[0-3]

et-x/0/11

et-x/0/11:[0-3]

Not Supported

et-x/0/12

et-x/0/12:[0-3]

et-x/0/12

et-x/0/12:[0-3]

Not Supported

et-x/0/13

et-x/0/13:[0-3]

et-x/0/13

et-x/0/13:[0-3]

Not Supported

et-x/0/14

et-x/0/14:[0-3]

et-x/0/14

et-x/0/14:[0-3]

Not Supported

et-x/0/15

et-x/0/15:[0-3]

et-x/0/15

et-x/0/15:[0-3]

Not Supported

et-x/0/16

et-x/0/16:[0-3]

et-x/0/16

et-x/0/16:[0-3]

Not Supported

et-x/0/17

et-x/0/17:[0-3]

et-x/0/17

et-x/0/17:[0-3]

Not Supported

et-x/0/18

et-x/0/18:[0-3]

et-x/0/18

et-x/0/18:[0-3]

Not Supported

Not Supported

Not Supported

Not Supported

Not Supported

Not Supported

et-x/0/20

et-x/0/20:[0-3]

et-x/0/20

et-x/0/20:[0-3]

Not Supported

Not Supported

Not Supported

Not Supported

Not Supported

Not Supported

et-x/0/22

et-x/0/22:[0-3]

et-x/0/22

et-x/0/22:[0-3]

Not Supported

et-x/0/23

et-x/0/23:[0-3]

et-x/0/23

et-x/0/23:[0-3]

Not Supported

et-x/0/24

et-x/0/24:[0-3]

et-x/0/24

et-x/0/24:[0-3]

et-x/0/24:[0-7]

et-x/0/25

et-x/0/25:[0-3]

et-x/0/25

et-x/0/25:[0-3]

Not Supported

et-x/0/26

et-x/0/26:[0-3]

et-x/0/26

et-x/0/26:[0-3]

Not Supported

et-x/0/27

et-x/0/27:[0-3]

et-x/0/27

et-x/0/27:[0-3]

Not Supported

et-x/0/28

et-x/0/28:[0-3]

et-x/0/28

et-x/0/28:[0-3]

Not Supported

et-x/0/29

et-x/0/29:[0-3]

et-x/0/29

et-x/0/29:[0-3]

Not Supported

et-x/0/30

et-x/0/30:[0-3]

et-x/0/30

et-x/0/30:[0-3]

et-x/0/30:[0-7]

et-x/0/31

et-x/0/31:[0-3]

et-x/0/31

et-x/0/31:[0-3]

Not Supported

et-x/0/32

et-x/0/32:[0-3]

et-x/0/32

et-x/0/32:[0-3]

Not Supported

et-x/0/33

et-x/0/33:[0-3]

et-x/0/33

et-x/0/33:[0-3]

Not Supported

et-x/0/34

et-x/0/34:[0-3]

et-x/0/34

et-x/0/34:[0-3]

Not Supported

et-x/0/35

et-x/0/35:[0-3]

et-x/0/35

et-x/0/35:[0-3]

Not Supported

Port Speed on PTX10003

Starting in Junos OS Evolved Release 19.3R1, you can configure 400-gigabit ethernet interfaces using QSFP56-DD-400GBASE-LR8 optics on PTX10003 routers. Only ports 0, 4, 5, 9 within each logical PIC support 400-Gigabit ethernet mode. When using 400G on port 0, the total bandwidth (speed x number-of-subports) of port 1 has to be less than 100G and port 2 has to be configured as 'unused' (see request security system-keystore unlink for more details). When using port 4 as 400G, port 3 must be configured with total bandwidth of less than 100G and port 2 must be configured 'unused'. Similarly, with port 5, 9 using 400G, port 6, 8 respectively must be configured for less than 100G and port 7 should be configured as 'unused'. That is, when a port is configured in 400-Gigabit ethernet mode, you cannot configure speed of the adjacent port to be more then 100-Gbps, and the middle port (2 between 0~4 or 7 between 5~9) must be set to unused. For example, you can set et-0/0/0 to 400G, et-0/0/1 to 100G or less, but et-0/0/2 must be set to unused.

For information on the PTX10003 router, see PTX10003-80C and PTX10003-160C Fixed Packet Transport Router Hardware Guide.

To view the supported transceivers, optical interfaces, and DAC cables on PTX10003, see Hardware Compatibility Tool (HCT).

Table 14 summarizes the Packet Forwarding Engine mapping and the supported port speeds for PTX10003-80C.

Table 14: Port Speed for PTX10003-80C
FPC PIC Ports Port Speed Supported
FPC0

PIC0

PIC1

0-9 each

(Port groups of 5 ports)

10-Gigabit Ethernet

25-Gigabit Ethernet

40-Gigabit Ethernet

100-Gigabit Ethernet

200-Gigabit Ethernet

400-Gigabit Ethernet

Default: Dependent on the transceiver

FPC1

PIC0

PIC1

0-9 each

(Port groups of 5 ports)

10-Gigabit Ethernet

25-Gigabit Ethernet

40-Gigabit Ethernet

100-Gigabit Ethernet

200-Gigabit Ethernet

400-Gigabit Ethernet

Default: Dependent on the transceiver

When port speed and sub-port-number are configured, the configured values override the default port speed for the transceiver. If you try to configure a port speed that is not supported by the transceiver, the port will be disabled. If the port speed is not configured on a valid optical port, the PTX10003 router uses a default port speed of 2x100 Gbps. If the number-of-subports is not configured, 1x 40G | 100G |200G |400G data rate is assumed. 1x10G sub-port is not supported.

Table 15: Port Speed for PTX10003-160C
FPC PIC Ports Port Speed Supported
FPC0

PIC0

PIC1

0-9 each

(Port groups of 5 ports)

10-Gigabit Ethernet

25-Gigabit Ethernet

40-Gigabit Ethernet

100-Gigabit Ethernet

200-Gigabit Ethernet

400-Gigabit Ethernet

Default: Dependent on the transceiver

FPC1

PIC0

PIC1

0-9 each

(Port groups of 5 ports)

10-Gigabit Ethernet

25-Gigabit Ethernet

40-Gigabit Ethernet

100-Gigabit Ethernet

200-Gigabit Ethernet

400-Gigabit Ethernet

Default: Dependent on the transceiver

FPC2

PIC0

PIC1

0-9 each

(Port groups of 5 ports)

10-Gigabit Ethernet

25-Gigabit Ethernet

40-Gigabit Ethernet

100-Gigabit Ethernet

200-Gigabit Ethernet

400-Gigabit Ethernet

Default: Dependent on the transceiver

FPC3

PIC0

PIC1

0-9 each

(Port groups of 5 ports)

10-Gigabit Ethernet

25-Gigabit Ethernet

40-Gigabit Ethernet

100-Gigabit Ethernet

200-Gigabit Ethernet

400-Gigabit Ethernet

Default: Dependent on the transceiver

The center port in each port group (port 2 and port 7) do not support 1x200 Gbps. To configure the speed as 200 Gbps for those ports, you'll need to configure them as 2x100 Gbps. For more details, see Understanding QSFP-DD Interfaces and Configurations . Also, only ports 0, 4, 5, or 9 on each PIC can support 400 Gbps or 4x100 Gbps. To configure the speed, you must plug in the appropriate transceiver and configure the speed.

Table 16: Channelization Configuration on PTX10003
QSFP Transceiver Native Port Speeds Channelization Options

QSFP56-DD

1x400 Gbps

4x100 Gbps

QSFP28-DD

1x200 Gbps

2x100 Gbps

8x25 Gbps

QSFP28

1x100 Gbps

4x25 Gbps

QSFP+

1x40 Gbps

4x10 Gbps

4x10 Gbps

To configure the number of optical channels for a particular port if the optics are used in a channelized mode. You can use this configuration option to configure a speed (10, 40, and 100 Gbps) in different number of channels based on the optics used. The default value of number-of-sub-ports per optics is 1. Following are the configurable values for the corresponding optic types:

Optic Type

QSFP56-DD-400GBASE-LR8 (400G)

QSFP DD 28F (200G)

QSFP 28 (100G)

QSFP+ (40G)

QSFP 28 (25G)

QSFP 28 DD(25G)

Default

Channelized

1

2

1

4

4

8

1

Non-channelized

NA

NA

1

1

1

1

1

You are not required to set any value for number-of-sub-ports while configuring 40G or 400G, as the default value for number-of-sub-ports is 1.

Table 17: Supported Port Speed and Unused Ports

Port Number

Speed

Port 0

400 Gbps

Port 1

100 Gbps

Port 2

Unused

Port 3

100 Gbps

Port 4

400 Gbps

Port 5

400 Gbps

Port 6

100 Gbps

Port 7

Unused

Port 8

100 Gbps

Port 9

400 Gbps

Table 18: Configuration Guidelines for 4x100 Gbps (PTX10003)

Ports with speed of 4x100 Gbps

Ports configured as Unused

Port 0

Port 1 and Port 2

Port 4

Port 2 and Port 3

Port 5

Port 6 and Port 7

Port 9

Port 7 and Port 8

Table 19: Interface Naming Convention for PTX10003

PIC

4x10-Gigabit Ethernet Interface

4x25-Gigabit Ethernet interface

4x100-Gigabit Ethernet Interface

40-Gigabit Ethernet Interface

100-Gigabit Ethernet Interface

2x100 Gigabit Ethernet Interface

200-Gigabit Ethernet Interface

400-Gigabit Ethernet Interface

0

et-x/0/0 :[0-3]

et-x/0/0 :[0-3]

et-x/0/0

et-x/0/0

et-x/0/0 :[0-1]

et-x/0/0

et-x/0/1 :[0-3]

et-x/0/1 :[0-3]

et-x/0/1

et-x/0/1

et-x/0/1 :[0-1]

et-x/0/1

et-x/0/2 :[0-3]

et-x/0/2 :[0-3]

et-x/0/2

et-x/0/2

et-x/0/2 :[0-1]

et-x/0/2

et-x/0/3 :[0-3]

et-x/0/3 :[0-3]

et-x/0/3

et-x/0/3

et-x/0/3 :[0-1]

et-x/0/3

et-x/0/4 :[0-3]

et-x/0/4 :[0-3]

et-x/0/4

et-x/0/4

et-x/0/4 :[0-1]

et-x/0/4

et-x/0/5 :[0-3]

et-x/0/5 :[0-3]

et-x/0/5

et-x/0/5

et-x/0/5 :[0-1]

et-x/0/5

et-x/0/6 :[0-3]

et-x/0/6 :[0-3]

et-x/0/6

et-x/0/6

et-x/0/6 :[0-1]

et-x/0/6

et-x/0/7 :[0-3]

et-x/0/7 :[0-3]

et-x/0/7

et-x/0/7

et-x/0/7 :[0-1]

et-x/0/7

et-x/0/8 :[0-3]

et-x/0/8 :[0-3]

et-x/0/8

et-x/0/8

et-x/0/8 :[0-1]

et-x/0/8

et-x/0/9 :[0-3]

et-x/0/9 :[0-3]

et-x/0/9

et-x/0/9

et-x/0/9 :[0-1]

et-x/0/9

For information on how to configure the speed at the PIC level, see Configure Port Speed - PIC Level. For information on how to configure the speed at the port level, see Configure Port Speed - Port Level.