Despite the industry’s charge toward network virtualisation, the need for customers to connect their routers to non-Ethernet legacy connections is not going away. Couple this with the fact that a bunch of emerging network functions require an on-prem appliance, and the virtualised ‘CPE of the future’ starts to feel, well, really rather physical. So, is the CPE the Wimbledon of the network; ever-present, resistant to change, but perhaps also capable of surprising us with its innovations?
Take Wimbledon’s white dress code, for example; a deeply entrenched tradition that has become a defining characteristic of the tournament. But in recent years, however, the dress discipline has been partially relaxed. Today, the tournament accommodates at least some expressions of colour. Similarly, the majority of CPE appliances that today deliver network connectivity and voice gateway functions are specialised devices, and will stoically remain so for the next few years. It’s just too expensive to do otherwise, until fiber with G.fast as a short-haul copper Ethernet extension become ubiquitous and all voice terminals are IP-based. Out of necessity, therefore, incumbent local exchange carriers (ILECs) will have little option but to support this CPE model. In other words, it looks like the traditionalists, both at the tennis and on the network, can rest easy. For now, at least.
But pressure to change is mounting. Competitive local exchange carriers (CLECs), together with alternative network operators, are more agile and, since they can target Ethernet-only network connections, can move more quickly to a vCPE approach. That said, some network functions will need to remain ‘on premise’, namely link management, service demarcation and service assurance. The network functions that can migrate to the virtualised center will do so over time. In our Wimbledon analogy, this equates to another tournament altogether, played on a far more contemporary surface than Wimbledon’s time-honoured grass. Competition indeed for the ‘historic home of tennis’.
The need for some functions to remain on premise means that the CPE will increasingly comprise hybrid devices – ones that support both traditional network functions and those located in a centralised and virtualised core. Incidentally, this won’t be just a single data centre, but rather a set of distributed virtualised centres located with the network infrastructure (most likely at POPs) to mitigate traffic tromboning.
The huge IT challenge of accommodating virtualised delivery of services mean that the CPE will also need to become a multi-tongued device able to speak next-generation protocols – Netconf, Openflow – as well as traditional CLI, TR-069 and SNMP. It seems inevitable that, after holding out for as long as they can, traditionalists at both Wimbledon and in the CPE, will be forced to accept some variations, but only within ‘proper’ limits of course!
We will also see the emergence of a hybrid ‘white-box’, where the legacy-connecting CPE hosts compute capability for certain virtualised functions. This will work for a small number of virtualised network functions (VNFs). A strong resurgence for ‘Wimbledon white’! Evidently, traditions have their uses, even when the world is changing.
And if a larger number of VNF components need to be deployed on premise, these will be accommodated on the much-vaunted ‘white box’. In other words they will be offloaded in aggregate function using Ethernet.
Just like the ILECs, the Wimbledon tournament, the oldest in the world, manages to maintain its legacy traditions yet also lead the way for change. The CPEs of the future will become increasingly white but at a pace of change that will not shock the traditionalists at the club. The future of virtualisation can rest in safe but innovative hands. All applaud the hybrid pCPE!
Pravin Mirchandani
Pravin Mirchandani joined OneAccess as Chief Marketing Officer in May 2011. A graduate of both the University of Edinburgh and the London School of Economics, with more than 20 years experience in the Telecoms industry, Pravin has held key roles in Marketing, Product Development and Sales at major telecom equipment manufacturers and software vendors such as Bay Networks, Nortel, Orchestream and Codima Technologies. Most recently, Pravin was CEO at Syphan Technologies UK, an innovative organisation providing security services to Managed Service Providers (MSPs). Pravin has excellent experience of working in France and is fluent in English, French and German. He lives in France with his wife and child.
