Enable the Network
Without the essential core network services of DNS and DHCP, a modern IP network is not enabled for use – and there is more to a network than a collection of switches and routers. Find out how we can provide this foundation.
These network enabling technologies are critical for today’s networks, and if implemented correctly will enable the network to expand massively without requiring re-architecting in the future. Indeed, the advent of smartphones, tablets and IP telephony solutions has already seen a massive increase in the number of devices appearing on corporate networks that place ever increasing demands on the core network services infrastructure. With the growth in initiatives such as “BYOD” (Bring Your Own Device) and IPv6, the quantity of IP addresses and complexity of the network is only going to increase.
Therefore it is of paramount importance that your core network services infrastructure is designed to cope with these ever increasing requirements.
Examples of where these services are used:
DNS
With IPv6, IP addresses are so complicated that it is impossible to remember them, meaning that the reliance on DNS will only every increase.
As corporates embrace BYOD and IPT, there are more and more devices reliant on DNS so it is essential that the DNS servers are sized correctly with sufficient capacity and that they are configured in a resilient configuration, such as in High-Availability pairs or implementing Anycast.
DHCP
With many companies deploying IPT, the VoIP handsets are also totally reliant on DHCP to obtain their IP address and configuration information automatically when they boot up. When sizing a DHCP server, it is important to remember the VoIP handsets when looking at capacity and performance statistics. If you operate a call centre that has 10,000 handsets and suffer a power glitch causing all the phones to reboot, can the DHCP server handle that many phones requesting IP addresses all at the same time?
DHCP can be configured in a failover configuration whereby more than one DHCP server can share the same address pool. This enables the load to be spread across multiple servers whilst also providing resilience should one server be unreachable.
NTP
Time synchronisation is not only important for auditing and compliance reasons, but many networking features require an accurate clock, including DHCP failover and DNS security.
There are many publicly available NTP servers available on the Internet that are available to query for free, but some organisations require incredibly accurate clocks or do not want to rely on the Internet for their time feed. In these cases it is recommended to implement a dedicated NTP appliance that synchronises time from another source, such as the GPS satellite network or long-wave radio service operated by the National Physical Laboratory.
TFTP
Next Steps
Getting started with Core Network Services is simple. No matter what stage in the process you are at, Calleva Networks can enable you with the resources you need to help Evaluate, Design and Deploy your Core Services infrastructure.
Evaluate: Take our product portfolio for a test drive.
Design: We will create a design overview so you can assess the deployment choices.