Allied Telesis AT-S99 - Manual (Page 55)

AT-S73 and AT-S99 Management Software User’s Guide
55
OAM Variable
Requests
This feature is part of the IEEE 802.3ah Ethernet OAM standard. It allows
you to view the performance and error statistics that are stored in the
Management Information Bases (MIBs) on remote OAM devices. To use
the feature, you specify the branch and leaf of the object identifier (OID) of
the MIB object you want to view. These are the last two parts of an OID.
The prefix of the OID is predefined in the OAM clients on the line cards
and is not adjustable. This feature has the following restrictions:
ˆ Variable requests use the following MIB tree prefix:
iso(1) member-body(2) us(840) ieee802dot3(10006) csmacdmgt(30)
ˆ Variable requests are transmitted from Port A, the fiber optic port, on
the line cards. This feature is not supported on Port B, the twisted pair
port.
ˆ You can use OAM variable requests to view, but not change MIB
values.
ˆ This feature cannot be used to view the MIB objects in the private
Allied Telesis MIB.
Note
The AT-CM Line Cards do not support any of the MIB objects in the
portion of the MIB tree that variable requests can access. So
although the line cards can send variable requests to query other
OAM-compatible devices for MIB values, they do not respond to
variable requests.
For instructions, refer to “Viewing MIB Variables with OAM Variable
Requests” on page 225.