Control Network; General About In-Band Management; Ethernet Dle - Net Insight Nimbra One User Manual

Control Network

General about In-band management

Element Manager User's Manual Nimbra OneSerie
©2006 Net Insight AB, All rights reserved
The management network is used for managing the nodes in the Nimbra
network. It is used when an operator or application accesses the nodes using
e.g. telnet, HTTP or SNMP. The network is also used by some other protocols,
such as NTP (Network Time Protocol).
Typically, the type of traffic on a management network is from one of a few
management stations located on a network outside the Nimbra network. The
management stations accesses the nodes when e.g. provisioning connections,
collecting network statistics, or when checking on the status of the nodes.
Alarm messages are usually sent from the managed nodes to a limited number
of management stations.
When managing the nodes, there is rarely any communication between the
nodes. Communication is done with the network management stations, either
from a network management system such as Nimbra Vision, or from a web
browser or telnet session. This traffic is routed via the gateway. Typically, only
a limited number of nodes in the Nimbra network reached are simultaneously
from a management station.

Ethernet DLE

DLE (DTM LAN Emulation) emulates a LAN (Local Area Network) as an
Ethernet segment on top of Net Insights network. It is implemented using
channels through the network. Seen from DLE, each node in the segment has
direct connectivity to all other nodes, as on an Ethernet segment. The
underlying physical topology of the DTM network is not related to the
topology of the segment, e.g. two nodes on the same DLE segment may be
located far away from each other.
DLE
Nimbra
client
X
DLE
Nimbra
client
X
Figure 44. Two DLE segments. These can represent one in-band mgmt
network using IP routes in order to connect the two segments, or as two
independent in-band mgmt networks, where each control part of the
network.
DLE Segment 1
DLE
server
server
DLE
client
D T M
DLE
client
DLE
server
DLE Segment 2
server
Nimbra
X
Nimbra
X
Control Network • 47