Specifications

OmniAccess 5510 USG - Release Notes
September 2010
header. If there are interoperability issues with the peer, the MRRU value of the peer MLPPP
interface has to be adjusted accordingly.
LFI
Link Fragmentation and Interleaving (LFI) is a Layer 2 technique in which all the Layer 2 frames are
broken into small, equal-size fragments, and transmitted over the link in an interleaved fashion.
Link Fragmentation and interleaving feature for MLPPP and FR supports the transport of real-time
(voice) and other (data) traffic on lower-speed PPP and FR links without causing excessive delay to
the real-time traffic. The feature enables delay-sensitive real-time packets and packets that are not
real-time data, to share the same link by fragmenting the long data packets into a sequence of smaller
data packets (fragments). The fragments are interleaved with the real-time packets. On the receiving
side of the link, the fragments are reassembled and the packet reconstructed. This method of
fragmenting and interleaving helps guarantee the appropriate Quality of Service (QoS) for the real-
time traffic
OAM
OAM (Operations, Administration, and Maintenance) describes the monitoring of network operation
by network operators. OAM is generally utilized for detecting and localizing network faults,
examining and reporting network status, monitoring network performance, and provisioning and
configuring user parameters. Supports Ethernet OAM functionality on Fast Ethernet interface and
BCP enabled T1E1 serial interface on OmniAccess 5510 USG.
BCP
Bridging feature on OmniAccess 5510 USG helps in carrying same VLAN tag across the interfaces,
carrying multiple network protocols data seamlessly and avoids complexity of a router configuration.
MAC Address, VLAN ID and 802.1p information remain intact while forwarding through WAN
interfaces. Supports PPP, MLPPP, WAN Ethernet, FR, HDLC interfaces. Supports MAC based
classification, MAC filtering, and QoS for bridge traffic.
ADSL - Multiple PVC
OmniAccess 5510-AA/AB USG supports multiple PVCs per ATM port with choice of different
encapsulations over each PVC. PVCs will be configurable via sub-interfaces. Each sub-interface on
the main ATM interface can be associated with an ATM PVC. Each PVC is an independent logical
interface having its own attributes like encapsulation, IP address, security policies and routing
policies.
Multiple Encapsulation over ATM Adaptation Layer 5
Each sub-interface on the main ATM interface can have its own encapsulation. OmniAccess 5510-
AA/AB USG supports LLC-SNAP and VC-MUX mechanisms to transport connectionless routed and
bridged packets over ATM Virtual Circuits. PPPoE, MAC Encapsulated Routing (MER), 1483
Bridged mode, 1483 Routed mode and PPP over ATM (PPPoA) are the encapsulation types that are
supported. The default encapsulation on ATM sub-interface is MER.
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