Available data-transfer speeds for FC ports

Provisioning Guide for VSP One Block

Version
10.2.x
Audience
anonymous
Part Number
MK-23VSP1B012-00

The available data-transfer speeds for the Fibre Channel ports depend on the port type and the connection type.

This table shows the available data-transfer speeds for 16-Gbps Fibre Channel ports (16-Gbps SFPs on Fibre 32Gbps Ready Channel Board).

Data transfer speeds for 16-Gbps ports/SFPs
Connection type 4 Gbps 8 Gbps 16 Gbps 32 Gbps Auto
FC-AL Available Available Not available Not available Available

If this combination is specified, the maximum transfer speed that is automatically specified is 8 Gbps.

P-to-P Available Available Available Not available Available (default)

If this default value is set, Fabric is set to ON automatically.

Fabric Available Available Available Not available Available

This table shows the available data-transfer speeds for 32-Gbps ports (32-Gbps SFPs on the Fibre 32Gbps Ready Channel Board.

Data transfer speeds for 32-Gbps ports/SFPs
Connection type 4 Gbps 8 Gbps 16 Gbps 32 Gbps Auto
FC-AL Not available Available Not available Not available Available

If this combination is specified, the maximum transfer speed that is automatically specified is 8 Gbps.

P-to-P Not available Available Available Available Available (default)

If this default value is set, Fabric is set to ON automatically.

Fabric Available Available Available Available Available

This table shows the available data-transfer speeds for 32-Gbps ports (32-Gbps SFPs on Fibre 64Gbps Channel Board).

Connection type Data transfer speeds for 32-Gbps ports/SFPs
4 Gbps 8 Gbps 16 Gbps 32 Gbps Auto
FC-AL Not available* Not available* Not available* Not available* Not available*
P-to-P Available Available Available Not available

Available (default)

If this default value is set, Fabric is set to ON automatically.

* For this channel board, you cannot specify FC-AL for Connection Type.

This table shows the available data-transfer speeds for 64-Gbps ports (64-Gbps SFPs on Fibre 64Gbps Channel Board).

Connection type Data transfer speeds for 64-Gbps ports/SFPs
4 Gbps 8 Gbps 16 Gbps 32 Gbps Auto
FC-AL Not available* Not available* Not available* Not available* Not available*
P-to-P Not available Available Available Available

Available (default)

If this default value is set, Fabric is set to ON automatically.

* For this channel board, you cannot specify FC-AL for Connection Type.

Considerations when setting transfer speeds

  • You cannot set the transfer speed if at least one of these conditions is met:
    • The host I/O processing is being performed.
    • The LU is in the host-reserved (mounted) status.
  • I/O processing that the user is not aware of, such as a health check of an OS or multipath software, might be in progress. If the I/O processing is in progress, the operations might not be performed. If this is the case, stop the I/O processing before the operations.

The following points apply when setting the speed:

  • If the HBA or switch supports 4, 8, 16, 32, or 64 Gbps, use 4, 8, 16, 32, or 64 Gbps for the data transfer speed of the CHB (FC) port, respectively.
  • If auto negotiation is required, some links might not be up when the server is restarted. Check the channel lamp. If it is flashing, disconnect the cable, and then reconnect it to recover from the link-down state.
  • The specified port speed is limited due to the combination of the type of the Fibre Channel port and the connection type topology.
  • If the transfer speed of the CHB (FC) port is Auto, the data might not be transferred at the maximum speed depending on the connected device.
  • Some fabric switches require that you specify point-to-point topology. If you enable a fabric switch, check the documentation for the fabric switch to determine whether your switch requires point-to-point topology.
  • If you connect a Fibre Channel port that supports 64 Gbps and whose transfer speed is set to 64 Gbps to an external Fibre Channel device (HBA or switch) that supports 64 Gbps, it might take about 10 to 25 seconds until the link is up.
  • If you connect a Fibre Channel port that supports 64 Gbps and whose transfer speed is set to Auto to an external Fibre Channel device (HBA or switch) that supports 64 Gbps, it might take 30 seconds or more until the link is up. If you need to shorten the linkup time to 30 seconds or less, set the fixed transfer speed.