Ace ACE-3205, Инструкция по установке и эксплуатации

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Chapter 1 Introduction Installation and Operation Manual
1-6 Overview ACE-3105, ACE-3205 Ver. 5.2
When working with multiple sessions of PPPoE or other dynamic entities,
ACE-3105, ACE-3205 provides virtual MAC addresses in addition to the standard
ones that are provided for each physical port.
LDP, PHP and MPLSoGRE
ACE-3105, ACE-3205 uses the MPLS label distribution protocol (LDP) to define
and distribute pseudowires and tunnel labels between up to 32 MPLS peers.
Traffic arrives to the device in pseudowires and above the tunnel label and not as
raw IP data.
The LDP functionality requires a software license.
Additionally, ACE-3105, ACE-3205 supports advanced MPLS label handling using
Penultimate Hop Popping (PHP), a packet-level modification process in which the
label switched router (LSR) removes the last label of MPLS packets before they
are passed to an adjacent label edge router (LER).
Lastly, MPLS (multiprotocol label switching) can be used over generic routing
encapsulation (GRE) to establish point-to-point tunnel connection over an IP
network. This tunneling service is used to transfer MPLS packets over an IP
network without using the IP addressing scheme. For a detailed description, refer
to
Appendix E .
ATM Switching and Policing Capabilities
ACE-3105, ACE-3205 provides full ATM switching capabilities, including scheduling
and shaping of ATM-based traffic. It is possible to assign each virtual connection
(VC) or virtual path (VP) to a service class, define the QoS parameters and shape
the ATM egress traffic according to CBR, VBR and UBR+. Up to 128 VP and VC
connections can be established with full UNI/NNI VPI and VCI ranges.
ATM traffic policing allows operators to discard, tag or count non-conformant
cells per configuration.
In addition, ACE-3105, ACE-3205 supports inverse multiplexing over ATM (IMA)
versions 1.0 and 1.1, allowing users to define up to 4/8/16 IMA groups (4 in
ACE-3105; 8/16 in ACE-3205).
Each of the unit's E1/T1 ports can be configured to work in ATM IMA, ATM UNI or
TDM over ATM mode (structured/unstructured CES). Up to 32 CES bundles are
supported over ATM.
Quality of Service (QoS) over PSN
Over packet-switched networks, QoS is provided according to the network type:
• Layer-2 network – outgoing pseudowire packets are assigned a dedicated
VLAN ID according to 802.1Q and marked for priority using 802.1p bits
• MPLS network – outgoing pseudowire packets are assigned to a specific MPLS
tunnel and marked for priority using EXP bits
• IP network – outgoing pseudowire packets are marked for priority using ToS
or DSCP bits.
Note