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Channelizing Interfaces

The QFX3500, QFX3600, QFX5100, and EX4600 switches provide 40-Gbps QSFP+ ports that can be channelized. Channelization allows you to configure 40-Gbps QSFP+ ports to operate as four 10-Gigabit Ethernet (xe) interfaces. You can use QSFP+ to four SFP+ breakout cables or QSFP+ transceivers with fiber breakout cables to connect the 10-Gigabit Ethernet ports to other servers, storage, and switches. By default, the four 40-Gbps QSFP+ ports operate as 40-Gigabit Ethernet (et) ports. When an et port is channelized to four xe ports, a colon is used to signify the four separate channels. For example, on a QFX3500 standalone switch with port 2 on PIC 1 configured as four 10-Gigabit Ethernet ports, the interface names are xe-0/1/2:0, xe-0/1/2:1, xe-0/1/2:2, and xe-0/1/2:3.

By default, the 40-Gbps QSFP+ ports on EX4600 and QFX5100 switches are channelized automatically (auto-channelized) if any of the four channels on a 40-Gbps QSFP+ port receive data, unless you have configured channelization either at the chassis level or at the port level. Auto-channelization is not supported on interfaces contained in expansion modules or on Virtual Chassis ports.

You can disable auto-channelization by including the disable-auto-speed-detection statement at the [edit chassis fpc slot-number pic pic-number (port port-number | port-range port-range-low port-range-high) channel-speed] hierarchy.

There are restrictions on the ports you can channelize on the QFX5100-24Q and QFX5100-96S switches, depending on the system mode you enable. If you try to channelize ports that are restricted, the configuration is ignored. See Configuring the System Mode for more information.

Caution: The Packet Forwarding Engine on the switch is restarted when you configure or delete a port. As a result, you might experience packet loss on the device. When you channelize a 40-Gbps QSFP+ port on the master of a Virtual Chassis, traffic might be disrupted on the master as well as on the line card members, and a mastership switchover occurs.

1. To configure a block of 40-Gigabit Ethernet (et) ports to operate as 10-Gigabit Ethernet ports, specify a port range and channel speed:
   [edit chassis fpc fpc-slot pic pic-slot]user@switch# set port-range port–range-low port-range-high channel-speed speed

   For example, to configure ports 0 through 3 on PIC 1 to operate as 10-Gigabit Ethernet ports:

   [edit chassis fpc 0 pic 1]user@switch# set port-range 0 3 channel-speed 10g
2. To configure an individual 40-Gigabit Ethernet (et) port to operate as 10-Gigabit Ethernet (xe) ports, specify a port number and channel speed:
   [edit chassis fpc 0 pic 0]user@switch# set port port-number channel-speed speed

   For example, to configure port 2 to operate as 10-Gigabit Ethernet ports:

   [edit chassis fpc 0 pic 0]user@switch# set port 2 channel-speed 10g
3. Review your configuration and issue the commit command.
   [edit]user@switch# commitcommit complete
4. To return a range of ports to the default 40-Gigabit Ethernet configuration, delete the 10g statement:
   [edit chassis fpc 0 pic 1]user@switch# delete port-range port-range-low port-range-high channel-speed speed

   For example, to return ports 0 through 3 to the default 40-Gigabit Ethernet configuration:

   [edit chassis fpc 0 pic 1]user@switch# delete port-range 0 3 channel-speed 10g
5. Review your configuration and issue the commit command.
   [edit]user@switch# commitcommit complete
6. To return a port to the default 40-Gigabit Ethernet configuration, delete the 10g statement:
   [edit chassis fpc 0 pic 0]user@switch# delete port port-number channel-speed speed

   For example, to return port 2 to the default 40-Gigabit Ethernet configuration:

   [edit chassis fpc 0 pic 0]user@switch# delete port 2 channel-speed 10g
7. Review your configuration and issue the commit command.
   [edit]user@switch# commitcommit complete

1. To disable auto-channelization at the port level, include the disable statement:
   [edit]user@switch# set chassis fpc slot-number pic pic-number (port port-number | port-range port-range-low port-range-high) channel-speed disable-auto-speed-detection

   For example, to disable auto-channelization for one port:

   [edit]user@switch# set chassis fpc 0 pic 0 port 2 channel-speed disable-auto-speed-detection

   For example, to disable auto-channelization for a range of ports:

   [edit]user@switch# set chassis fpc 0 pic 0 port-range 2 4 channel-speed disable-auto-speed-detection
2. Review your configuration and issue the commit command.
   [edit]user@switch# commitcommit complete