PRELIMINARY
Technical Description
4.4.8 Storm Protection
The storm protection mechanism protects other parts of the network from being
affected by flooding from broadcast or multicast traffic at a very high bit rate.
Storm protection can be activated per EVC to reduce unwanted or hostile
traffic. If the limit is reached, additional bits are discarded until the bit rate is
below the specified threshold.
The packet radio only supports storm protection on EVC, not on the port.
4.5 Ethernet Protection
4.5.1 Rapid Spanning Tree Protocol
The packet radio supports the Rapid Spanning Tree Protocol (RSTP) according
to the standard IEEE 802.1D (2004).
The RSTP mechanism adapts to changes in the physical network topology
(that is, links going down and coming up) faster than the traditional STP variant.
The STP variant takes a minute to adapt to a change, while the RSTP adapts
in less than a second.
4.6 Delay
Typical delay performance per link for priority traffic is <100 µs.
4.7 Ethernet Operation and Maintenance
This section describes O&M capabilities related to the Ethernet application.
4.7.1 Ethernet Link OAM
The packet radio supports the Ethernet link layer OAM based on the IEEE
802.3ah specification, which enables service providers to monitor and
troubleshoot a single Ethernet link. The primary benefits of IEEE 802.3ah are
that it enables the service provider to monitor a link for critical events and then,
if necessary, put the remote device into loopback mode in order to do a test on
the link.
The following IEEE 802.3ah features are supported:
• Discovery — Identifies devices in the network and their OAM capabilities.
It uses periodic OAM Protocol Data Units (PDUs) to advertise OAM mode,
configuration, and capabilities; to advertise PDU configuration; and platform
identity.
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1/22102-HRA 901 17/9 Uen PU1 | 2016-07-04
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