HP StorageWorks 4000/6000/8000 .HP StorageWorks SAN Design Reference Guide, Pa - Page 289

• Using a port channel, bundles up to sixteen 2 Gb/s links to form a single 32 Gb/s link. • Using a port channel, bundles up to sixteen 4 Gb/s links to form a single 64 Gb/s link. • Using a port channel, bundles up to sixteen 10 Gb/s links to form a single 160 Gb/s link. • All port channel links must be the same speed. H-series switch settings The H-series switches have a fixed BB-credit setting. When using supported long-wave SFP, the following distances are supported: • 3.3 km at 8 Gb/s • 6.6 km at 4 Gb/s • 10 km at 2 Gb/s M-series switch settings Table 143 lists the M-series switch extended fabric settings for maintaining performance with extended fabric links. Table 143 M-series switch extended fabric settings Extended fabric item Supported switch models Setting 2 Gb/s and 4 Gb/s See Table 60 and Table 62 in "M-series switches and fabric rules" on page 157 for detailed information. Maximum number of hops Maximum segment distance 3 200 km between any two devices in the SAN See Table 80, Table 81, and Table 82 in "SAN fabric connectivity and switch interoperability rules" on page 167 for detailed information about distance rules for long-wave transceivers. NOTE: The HP C-series CWDM solution is not supported on M-series switches. See "Certified third-party WDM products" on page 353 for M-series supported WDM devices. Consider the following when using M-series switches with extended fabric links: • The HP StorageWorks Edge Switch 2/24 has a fixed BB_credit setting and is limited based on the port number to support links beyond 500 m for 1 Gb/s and 300 m for 2 Gb/s. • Ports 0 through 3 support distances up to 20 km at 1 Gb/s and up to 10 km at 2 Gb/s. • Ports 4 through 23 do not have enough BB_credits to support long-wave SFP transceivers. Therefore, they only support the short-wave SFP transceiver link distances of 500 m at 1 Gb/s or 300 m at 2 Gb/s. • To maintain line-speed performance for extended lines over 10 km, you must configure the nl applicable ports for the RX BB setting. The RX BB setting cannot be changed unless the port is offline. Using HAFM, select the Configure Ports menu option to display the Configure Ports dialog box (Figure 81). SAN Design Reference Guide 289