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Release 7.0.0 3DB 19286 ACAA Issue 01
WebEML User Manual
72 Administer SDH LAG
72.1 Purpose
This chapter provides detailed procedures to administer drop priority of SDH cross-
connections on L1 Radio LAG ports.
For more information about SDH2SDH flows with L1 LAG on EASv2, see the
9500 MPR Product Information Manual. For information about configuring cross-
connections, see
In the ANSI market, this feature is only available with the MPT-HLC.
72.2 General
If the LAG rate has dropped to less than the bandwidth required by the SDH flows,
all the cross-connected SDH flows could be affected by congestion and frame loss.
To avoid this, a subset of the SDH2SDH flows cross-connected to the LAG is
dropped.
The drop priority value of a flow defines the minimum LAG bandwidth required to
support the flow. An SDH flow with a drop priority of 255 will be the first to be subject
to the selective drop, as soon as the LAG rate is not enough to transmit all the SDH
flows connected to the LAG. An SDH flow with a drop priority of 1 will be the last to
be subject to the selective drop.
When a cross-connection is created, the default drop priority of the flow is 255. It is
possible to configure different drop priority values for each flow. This will allow the
available LAG bandwidth to be used to transport as many cross-connected SDH
flows as possible. If the same drop priority value is assigned to more than one SDH
flow, the drop priority defines the minimum LAG bandwidth required to transport all
SDH flows with that drop priority.
If the same flow is cross-connected on the other side of the LAG or in a forwarding
path, the drop priority should be configured the same in each NE.
Provision cross
connections.
Administer SDH LAG
1043
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