IBM 2027-R04, Инструкция по установке и обслуживанию

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SAN16M-R SAN Router Installation And Service Manual 56
GE port troubleshooting
Table 22
GE port problems and solutions
Problem Solution
Only one of your GE ports is showing
activity. • Check that the GE cable is securely inserted in both the SAN Router and the
Gigabit Ethernet port on the SAN Router
• Make sure that the Gigabit Ethernet cable is not damaged and that nothing sharp
or heavy has been placed directly on it (this may damage the delicate fiber of the
cable).
• Check that the RX and TX connectors are correct on the cable (the individual
connectors may need to be switched around to correct the signal).
• Try another cable.
• Make sure that the cable doesn't have any kinks in it and that it is not damaged.
You need to know how to use In-Band
management. You can manage the SAN Router through the Gigabit Ethernet interface. The IP
address to use in SANVergence Manager is the SAN Router’s in-band IP address.
In-band management is only supported on a Gigabit Ethernet port set to Gigabit
Ethernet port, not Gigabit Ethernet trunk port or COS ports.
Ethernet frames are being dropped. • A GE switch with mFCP links between the SAN Router in the same cluster must
have IEEE 802.3x symmetric flow control enabled to both send and receive pause
frames. Refer to the documentation for your GE switch vendor for further
information. GE SAN Routers in an iFCP or iSCIL link do not require 802.3x flow
control.
• Check to ensure you have GE rated SFPs. Fibre Channel rated SFPs will not
function properly with GE.
• Physical problems such as dirty optical connections, damaged cables or sheaths or
damaged SFPs will cause intermittent communication errors.
• Consider rate limiting.
You need to know which GE port type to
select on the SAN Router. The GE port is the most basic port type. If you are going to use in-band management,
at least one port on the SAN Router must be set to this mode. GE trunk ports use a
trunking protocol to aggregate two or more links to a supported GE switch. COS mode
enables a class of service function that is supported by some products.