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<p class="MsoNormal"><font face="Verdana" size="1">Being built as a multipurpose IP network
MINA IP provides
Ethernet level connectivity and with a low latency of 40ms is suitable
for transport of data, digital video, digital audio, VOIP and similar
services. </font> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">The Canopy network installed in Podgorica
municipality provides two
types of connectivity . First type is the standard internet access and
second type is connection of remote facilities into closed internal client
networks. The current setup of the network allows segmentation into 4096
VLAN’s and each of the VLANS can be routed via the main router on Ljubovic
BS or one of two redundant auxiliary routers . Auxiliary router one is
located in Mina NOC and auxiliary router two is located in Montsky premises.
In case of the failure of the main router one of the redundant ones kicks
in and overtakes the control of the network. Even if the network suffers the
malfunction of the two routers the third one will kick in an provide
constant service to the customers. This is why we have decided to use
logical VLAN routing because it gives system high flexibility and
possibility to give non standard service to the client and makes a network
very robust.</font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">Vlan’s designated for internet connectivity are using
14 public IP addresses each in order to lower the broadcast traffic on the
network and to have better control.</font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">Customers are using Canopy SM in routing mode to
provide service for their LAN or they can using Mikrotik router which gives
them more possibilities like proxy, VPN access to their network and similar.
Each 5.4Ghz network user is being given at least one static public IP
address. </font> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">Bandwith plans are symmetric and we are offering
128/128 kbps , 256/256 kbps and 512/512 kbps flat rate internet access
plans. </font> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">Mina network has forwarding DNS services, transparent
web proxy service for HTTP traffic and SMTP server. The web hosting services
are also being offered to the clients but the hosting is done with the big
provider in the US because of a limited internet connectivity of out
network. </font> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">The network has been controlled and monitored by two
systems. </font> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">First system is a Motorola Prism integrated solution
which is used to authenticate the Canopy users and to do the bandwidth
control based on the service plan that a user has purchased. Prizm is also
used to monitor and control Canopy units because when fully integrated into
the system it does the links capacity monitoring , signal level monitoring,
logging of errors and makes the database of all the manifestations that
happen in the system. With Prizm we can also do the remote setup of Canopy
devices without need to log on to each device individually.</font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">Second system is a SNMP monitoring agent which monitors
Canopy network, Mikrotik 2.4 Ghz clusters and the rest of network equipment
. It is used for to alarm the technician in case of problem within the
network.</font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">2.4 Ghz Micro clusters</font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">This network segment is an add-on to the main 5.4 Ghz
network . The purpose of this segment is to extend the coverage footprint to
areas that don’t have LOS to our Canopy BS , to allow mobile users with 2.4
Ghz equipment to be able to have connectivity on any of our micro clusters
and to lower the expense of necessary equipment needed to connect to the
system.</font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">Each one of our 2.4 Ghz AP micro clusters is connected
to a Canopy SM and the traffic that is generated from this locations is
channelled to several VLAN’s designated for this type of service . One of
the three redundant key routers is controlling the traffic on this VLAN’s
and therefore controlling the access to micro clusters in coordination with
two Radius servers which store the customer data.</font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">The typical scenario for access to microcluster is.</font></p>
<p class="MsoNormal"> </p>
<ol style="margin-top: 0cm; margin-bottom: 0cm" start="1" type="1">
<li class="MsoNormal"><font face="Verdana" size="1">Customer detects a Mina-Montsky wireless AP</font></li>
<li class="MsoNormal"><font face="Verdana" size="1">Customer connects to the network and receives DHCP
data</font></li>
<li class="MsoNormal"><font face="Verdana" size="1">customer opens the web browser and tries to browse
the internet</font></li>
<li class="MsoNormal"><font face="Verdana" size="1">Browser opens the Authorisation page where
customer has to insert username and password. This is the only page that
customer can open before authorising</font></li>
<li class="MsoNormal"><font face="Verdana" size="1">One of routers contacts the Radius server to check
user credentials</font></li>
<li class="MsoNormal"><font face="Verdana" size="1">If Radius sends to positive answer the customer is
allowed to access internet , depending of the type of service that he
has subscribed to his bandwidth and connection limits are sent to main
router</font></li>
<li class="MsoNormal"><font face="Verdana" size="1">Man router opens the accounting session for user
and starts feeding the radius with data every 30 seconds.</font></li>
<li class="MsoNormal"><font face="Verdana" size="1">Customer disconnects . Main router after 30
seconds closes the Radius session for that user.</font></li>
</ol>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">This system allows us to control each user access
rights from a central location, it provides accounting and billing
possibilities and makes possible to sell service plans based on :</font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal" style="text-indent: -18.0pt; margin-left: 36.0pt">
<font face="Verdana" size="1">-</font><span style="font-style:normal; font-variant:normal; font-weight:normal; font-family:Verdana"><font size="1">
</font>
</span><font face="Verdana" size="1"><span dir="LTR">flat rate for certain number of days</span></font></p>
<p class="MsoNormal" style="text-indent: -18.0pt; margin-left: 36.0pt">
<font face="Verdana" size="1">-</font><span style="font-style:normal; font-variant:normal; font-weight:normal; font-family:Verdana"><font size="1">
</font>
</span><font face="Verdana" size="1"><span dir="LTR">transferred amount of data</span></font></p>
<p class="MsoNormal" style="text-indent: -18.0pt; margin-left: 36.0pt">
<font face="Verdana" size="1">-</font><span style="font-style:normal; font-variant:normal; font-weight:normal; font-family:Verdana"><font size="1">
</font>
</span><font face="Verdana" size="1"><span dir="LTR">time spent on line</span></font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">Each Micro cluster is operating in WDS mode so that we
can connect repeaters to further expand the footprint and we have used WDS
to interconnect micro cluster and by that way we have established an
alternative backbone for micro clusters. Each micro cluster is connected via
WDS to at least one other micro cluster . Using the RTSP protocol a MESH
network is formed independent from Canopy network. In case that SM connects
one of the micro clusters to Canopy backbone fails for some reason MESH
will kick in and enable the connection to another micro cluster so that both
of them use only one SM. After the failed SM has recovered the state will
automatically change to the first position and the micro cluster will use
internet from Canopy Backbone.</font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><font face="Verdana" size="1">Total maximum throughput of 7 micro clusters installed
in Podgorica is 77 Mbps and maximum number of users on all locations is
2800. </font> </p>
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