Brocade Communications Systems Network Advisor 12.3.0, User Manual

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960 Brocade Network Advisor SAN User Manual
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Configuring an FCIP tunnel
22
NOTE
VEx ports are not supported on Brocade 7840.
3. Select the desired compression mode.
A Standard option provides hardware compression. The 8 Gbps Extension Switch and the 8
Gbps Extension Blade provide three additional options for compression. The Moderate option
enables a combination of hardware and software compression that provides more
compression than hardware compression alone. This option supports up to 8 Gbps of FC
traffic. The Aggressive option is a software-only compression option that provides a more
aggressive algorithm. This option supports up to 2.5 Gbps of FC traffic. The Auto option allows
the system to set the best compression mode based on the tunnel’s configured bandwidth and
the bandwidth of all tunnels in the system.
NOTE
The compression modes will differ for the Brocade 7840. The default option is Off. The Fast
Deflate compression is handled by the FPGA that performs compression on a frame-by-frame
basis and uses an LZ algorithm to compress. The Aggr Deflate option is a software-only
compression option that provides a more aggressive algorithm. The Deflate option allows
multiple FC frames to group together and send for compression.
4. Select Advanced Settings from the Add FCIP Tunnel dialog box.
The Transmission tab of the FCIP Tunnel Advanced Settings dialog box displays ( Figure 433 ).
FIGURE 433
FCIP Tunnel Advanced Settings dialog box
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Select the Fast Write check box to reduce delays caused by latency. Refer to “Enabling
Open Systems Tape Pipelining” on page 967 for more information.
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Select the Tperf Test Mode check box for testing and troubleshooting tunnel. Refer to
“Enabling Tperf test mode” on page 967 for more information.