Description of the EAN
1553-CNH 160 0787 Uen PA2 2005-09-23
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nodes. Note that only the management traffic is going through the ENC.
The end-user traffic is unaffected by the EAN structure.
The ENC assumes all the functions of the Access Domain Server for the
embedded nodes. However, the Access Domain Server must be running
for the following reasons:
1. All communication with the ECN is SNMP based, and therefore goes
through the Domain Service, which is installed on the Access Domain
Server.
2. The ENC receives new SW applications for the ECN from the Domain
File Server when a SW upgrade is performed, and the Domain File
Server is located on the Domain Server.
3. The ENC receives SW applications and configurations for the embed-
ded nodes from the Domain File Server when the EAN is synchronized
from PEM.
Note: Only the following nodes are supported as embedded nodes in this
release: EDN110, EDN312, ESN108, ELN220, EXN104, ESN310
and ECN switch.
The ECN is connected as an Ethernet switch, aggregating the IP DSLAMs,
see
Figure 11 on page 29. All the connections between the ECN and the
embedded nodes are normal Ethernet connections (with or without PoE).
Management traffic between PEM and ECN is directed to the EDA man-
agement VLAN. However, the management traffic between the ECN and
the embedded nodes is directed to an internal EAN management VLAN.
The EAN internal management VLAN is (and must be) a different VLAN
from the EDA management VLAN in order to separate the two logical net-
works. Two different Ethernet Access Nodes may use the same VLAN id
for the internal management traffic. This will have no consequence, since
this VLAN is not visible for the rest of the network, outside the EAN. Apart
from the internal management VLAN, other VLANs are reserved for internal
use of the EAN.
End-user traffic must not be directed to any of the reserved VLANs. The
VLAN issue is discussed in more details in section
3.2 on page 15.
6.1 EAN in the Network
The topology of the EDA network based on the EAN can be designed in
various ways using the EDA nodes listed below:
• ECN – The 24 port Ethernet Controller Node
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