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Description:
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subPortNumber OBJECT-TYPE
SYNTAX Integer32 (0..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The subPortNumber is used to identify multiple logical
ports on a physical that require their own interface
number, e.g. DS1s on a DS3 port.
Note that multiple protocol layers such as IP over ATM
do not require unique interface numbers and are handled
by the standard ifStackTable mechanism.
Subport 0 is reserved to designate that a physical port
has no subport and hence a single interface number."
REFERENCE
"RFC 2233 - The Interfaces Group MIB using SMIv2"
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iso(1)
