HP StorageWorks 1606 HP StorageWorks FOS 6.3.0b Release Notes (5697-0360, Apri - Page 25

On the DC SAN Director Multiprotocol Extension Blade, GigE ports 0-9 or 10-GbE port 1

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• When additional circuits (and the network bandwidth provided by those circuits) are added to an already active tunnel, there is a short period where some frame loss can occur due to the process to refresh the internal FC frame routing tables in the switch. Therefore, additional circuits should be added only during low I/O periods using the FCIP tunnel being modified. In addition, if the circuit operation (addition/deletion) to the tunnel increases or decreases the total tunnel bandwidth, an FCIP tunnel (VE_Port) disable/enable sequence should be performed after the addition or deletion of the circuit. This allows the switch to adjust the internal routes to fully utilize the new bandwidth. • Switching modes between 10G and 1G is disruptive to FCIP traffic. • Keep Alive Timeout (ms). The valid range is 500 ms to 7,200,000 ms (inclusive). The default value is 10,000 ms (10 seconds). If FICON is configured, the recommended value is 1000 ms (1 second), otherwise the recommended value is the default of 10 seconds. For impairment networks with 100 ms latency and 0.5% packet loss, Keep Alive Timeout should be configured as 30 seconds. If the local and remote circuit configurations' Keep Alive Timeout values do not match, the tunnel will use the lower of the two configured values. • Software compression (available on the 1606 Extension SAN Switch) modes 2 and 3 are not supported in FICON environments; they are supported only in Open Systems environments. • Software compression (modes 2 and 3) generally gives a better compression ratio, but not the throughput or bandwidth across all six GE ports. HP recommends software compression for lowthroughput links and supports throughput up to 2 Gb/s across all 6 GE ports. • To perform the following operations you must delete the FCIP configuration on the affected ports first: • Switching modes between 1G/10G/Dual • Moving VE/GE port between logical switches • The DC SAN Director Multiprotocol Extension Blade supports three operating modes: • Mode 1: 10 1-GbE ports mode (default) • Mode 2: 10 1-GbE ports and 1 10-GbE port • Mode 3: 2 10-GbE ports Modes 2 and 3 require the slot-based 10-GbE FCIP license. • ARL is not supported on 10-Gb tunnels. • IPv6, IPsec, DiffServ VLAN tagging, and In-band Management are not supported on the 1606 Extension SAN Switch or DC SAN Director Multiprotocol Extension Blade. • FOS 6.3 supports only up to four 1-Gb circuits per VE/FCIP tunnel for the 1-Gb interfaces. A VE/FCIP tunnel created over 10-Gb interfaces will be limited to 10 circuits created using IPIFs on the same 10-GbE port (and no more than 1 Gb per circuit). • As a recommended best practice, the VE tunnel should not be oversubscribed (for example, 8-Gb FC traffic over 500 Mb/s tunnel). General guidelines are 2:1 subscription without compression and 4:1 with compression. • Nondisruptive firmware activation on FOS 6.3 will disrupt I/O traffic on FCIP links. • FCR (VEX) is not supported on the DC SAN Director Multiprotocol Extension Blade but is supported on the 1606 Extension SAN Switch. • Differences between the 1606 Extension SAN Switch/DC SAN Director Multiprotocol Extension Blade platforms and previous-generation 7500/FR4-18i platforms include: • On the 1606 Extension SAN Switch, the GigE port does not directly correlate to a VE_Port. • On the DC SAN Director Multiprotocol Extension Blade, GigE ports 0-9 or 10-GbE port 1 (xge1) correspond to VE_Ports 12-21, and 10-GbE port 0 (xge0) corresponds to VE_Ports 2231. HP StorageWorks FOS 6.3.0b Release Notes 25

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•
When additional circuits (and the network bandwidth provided by those circuits) are added to an
already active tunnel, there is a short period where some frame loss can occur due to the process
to refresh the internal FC frame routing tables in the switch. Therefore, additional circuits should
be added only during low I/O periods using the FCIP tunnel being modified. In addition, if the
circuit operation (addition/deletion) to the tunnel increases or decreases the total tunnel bandwidth,
an FCIP tunnel (VE_Port) disable/enable sequence should be performed after the addition or de-
letion of the circuit. This allows the switch to adjust the internal routes to fully utilize the new
bandwidth.
•
Switching modes between 10G and 1G is disruptive to FCIP traffic.
•
Keep Alive Timeout (ms). The valid range is 500 ms to 7,200,000 ms (inclusive). The default value
is 10,000 ms (10 seconds). If FICON is configured, the recommended value is 1000 ms (1
second), otherwise the recommended value is the default of 10 seconds. For impairment networks
with 100 ms latency and 0.5% packet loss, Keep Alive Timeout should be configured as 30
seconds. If the local and remote circuit configurations' Keep Alive Timeout values do not match,
the tunnel will use the lower of the two configured values.
•
Software compression (available on the 1606 Extension SAN Switch) modes 2 and 3 are not
supported in FICON environments; they are supported only in Open Systems environments.
•
Software compression (modes 2 and 3) generally gives a better compression ratio, but not the
throughput or bandwidth across all six GE ports. HP recommends software compression for low-
throughput links and supports throughput up to 2 Gb/s across all 6 GE ports.
•
To perform the following operations you must delete the FCIP configuration on the affected ports
first:
•
Switching modes between 1G/10G/Dual
•
Moving VE/GE port between logical switches
•
The DC SAN Director Multiprotocol Extension Blade supports three operating modes:
•
Mode 1: 10 1-GbE ports mode (default)
•
Mode 2: 10 1-GbE ports and 1 10-GbE port
•
Mode 3: 2 10-GbE ports
Modes 2 and 3 require the slot-based 10-GbE FCIP license.
•
ARL is not supported on 10-Gb tunnels.
•
IPv6, IPsec, DiffServ VLAN tagging, and In-band Management are not supported on the 1606
Extension SAN Switch or DC SAN Director Multiprotocol Extension Blade.
•
FOS 6.3 supports only up to four 1-Gb circuits per VE/FCIP tunnel for the 1-Gb interfaces. A
VE/FCIP tunnel created over 10-Gb interfaces will be limited to 10 circuits created using IPIFs on
the same 10-GbE port (and no more than 1 Gb per circuit).
•
As a recommended best practice, the VE tunnel should not be oversubscribed (for example, 8-Gb
FC traffic over 500 Mb/s tunnel). General guidelines are 2:1 subscription without compression
and 4:1 with compression.
•
Nondisruptive firmware activation on FOS 6.3 will disrupt I/O traffic on FCIP links.
•
FCR (VEX) is not supported on the DC SAN Director Multiprotocol Extension Blade but is supported
on the 1606 Extension SAN Switch.
•
Differences between the 1606 Extension SAN Switch/DC SAN Director Multiprotocol Extension
Blade platforms and previous-generation 7500/FR4-18i platforms include:
•
On the 1606 Extension SAN Switch, the GigE port does not directly correlate to a VE_Port.
•
On the DC SAN Director Multiprotocol Extension Blade, GigE ports 0-9 or 10-GbE port 1
(xge1) correspond to VE_Ports 12-21, and 10-GbE port 0 (xge0) corresponds to VE_Ports 22-
31.
HP StorageWorks FOS 6.3.0b Release Notes
25