Ace ACE-3205, Инструкция по установке и эксплуатации

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Installation and Operation Manual Chapter 1 Introduction
ACE-3105, ACE-3205 Ver. 5.2 Functional Description 1-25
port. Once the virtual MAC file is loaded, it is used by PPPoE entities and bridge
ports, if such are configured.
In addition:
•
When a VCL is defined for DSL ports, several PPPoE sessions can be defined
on the same VCL
•
Two PPPoE sessions can be established over the same ADSL2+ interface (see
Figure 1-19 )
•
One PPPoE session is used to carry OAM traffic directed towards/from
ACE-3105, ACE-3205, and the second PPPoE session is used to carry all the
traffic to/from the Node B (a single PPPoE session is used for both data and
OAM traffic of the Node B)
•
Each PPPoE session uses a different virtual source MAC address, and allocates
a dynamic IP address from the LNS. The allocated IP address does not
change, and another IP interface is defined statically on the Ethernet port
that communicates with the Node B, to allow ARP processing between
ACE-3105, ACE-3205 and the Node B.
Figure 1-19. Cross-Network PPPoE Utilization
For more information about the encapsulation of packets transmitted over
ADSL2+ towards the PSN, refer to
Appendix E
.
Bridge
The unit’s Ethernet ports can be used as bridge ports. The bridge functionality
supports VLAN-aware bridge in IVL mode, which means that the bridge forwarding
decision is made according to the MAC address and VID. As a result, the same
MAC address can be learned\configured with different VIDs.
The VLAN-aware bridge supports two types of VLAN tag manipulations:
• Egress tag striping – per user configuration, the external VLAN tag of a frame
can be stripped before it is transmitted from a bridge port. Since the VLAN
tag stripping is performed upon exiting the bridge, all bridge forwarding
decisions are made according to the external VLAN tag (which is removed
before the transmission).