White Papers

Table Of Contents
Field Description
Information:
Fibrechannel 0/0
is down, FC link
is down
Administrative state of the Fibre Channel interface (up/no shutdown or down/ shutdown) and
operational state of the FC link (up or down).
Pluggable media
present, SFP+
type
Pluggable optic is inserted in the port or not, and the SFP+ optic type.
Wavelength Wavelength of the inserted optic.
SFP+ receive
power
Power received on SFP+ optic.
Interface index Index number of FC port.
MTU Maximum transmission unit on interface (not user-configurable; fixed at 2148 bytes).
LinkSpeed Configured transmission speed of the FC port when the port link is down or current speed when the port
link is up. Valid link speeds are: auto (port autosenses speed of peer FC port), 2G, 4G, or 8G.
Port type, Max
BB credits
The FC port type is fixed at N (end node port) in NPG mode and are automatically set to F (fabric port)
or E (extended port) in Fabric Services. The maximum number of buffer-to-buffer (BB) credits available is
fixed at 16.
WWN, FC-ID Factory-provided world-wide name (WWN) of FC port (in hexadecimal) that uniquely identifies the port
on the switch (not user-configurable) and the unique FC port ID (24-bit in hexadecimal) received from an
FC switch in the fabric after a successful login.
Last clearing of
show interface
counters
Elapsed time since the interface counters displayed in show interfaces output were last cleared.
Statistics:
BBCR_FrameFail
ures
Number of link resets due to frames lost during buffer-to-buffer credit recovery (BBCR) period.
BBCR_RRDYFra
meFailures
Number of link resets due to multiple Receiver Ready (R_RDY) frames received during the credit recovery
period.
Class2FramesIn Number of Class 2 frames received.
Class2FramesOut Number of Class 2 frames transmitted.
Class3FramesIn Number of Class 3 frames received.
Class3FramesOut Number of Class 3 frames transmitted.
Class3Discards Number of Class 3 frames dropped.
DecodeErrors Number of decode errors.
FBusy Number of Fabric port Busy (F_BSY) frames received.
FReject Number of Fabric port Reject (F_RJT) frames received.
AddressErrors Number of frame-address ID errors.
LinkFailures Number of link failures.
InvalidCRC Number of cyclic redundancy check (CRC) errors.
TotalRxBytes Number of bytes received.
TotalTxBytes Number of bytes transmitted.
LongFramesIn Number of long frames received.
LossOfSync Number of loss of synchronization errors.
ShortFramesIn Number of truncated frames received.
RxLinkResets Number of link resets on received frames.
Fibre Channel Interface 317