In this example, you set security zones from zone ggsn and to zone sgsn. Next you set the GGSN policy name to ggsn-pool-g2s. You set the name of the match source address to ggsn-1 and the match destination address to sgsn You set the action type to permit. Then you set the application services name to gprs-gtp-profile and the GTP profile name to test. Finally, you set the default policy name to deny-all. To quickly configure this example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, copy and paste the commands into the CLI at the [edit] hierarchy level, and then enter commit from configuration mode.
From configuration mode, confirm your configuration by entering the show security policies command. If the output does not display the intended configuration, repeat the configuration instructions in this example to correct it. If you are done configuring the device, enter commit from configuration mode. This example shows how to configure custom applications to support GGSN pooling scenario 1.
They employed circuit-switched technologies for voice, SMS and also mobile data. These nodes allow us to access external networks such as the internet through our mobile phones when we are on 2G or 3G networks. The core network is central to the overall mobile network because it allows the subscribers of a mobile operator to access all the services that they are entitled to.
The packets of data with information content e. The SGSN is responsible for mobility management, billing, and the management of data sessions. So, just like the MSC utilises its circuit-switched capabilities to facilitate voice services, SGSN uses its packet-switched capabilities to facilitate data services.
That way, it allows our mobile phones to be able to connect to external networks. GGSN converts that data into a suitable protocol format e. IP before sending it over to the destination external network. On the way back, the process is reversed. Up for a challenge? Test your knowledge with our 5 minute Telecoms Quiz to see how you stack up. We use cookies to help improve our services. By clicking 'Accept' you consent to our use of cookies. The existing GSM network architecture is used to carry the circuit switched voice calls as well as the network access, etc.
With GPRS providing additional connectivity in terms of packet data, there are naturally a number of upgrades needed to the network architecture required. A number of new elements are needed for the network, but these can operate alongside the existing elements meaning that the GPRS capability is an upgrade to the network and not a completely new network structure.
From the diagram given above it can be seen that the GPRS network architecture added some extra elements to the GSM network to enable it to cary the packet data. The PCU added to the base station network routed the data according to whether it was packet or circuit switched.
It provides a variety of services to the mobiles:. There is a location register within the SGSN and this stores location information e. It also stores the user profiles e.
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