For HiST, the second largest university college in Norway, the decision to adopt the new 802.11ac specification for high-speed wireless was an easy one. The growing use of collaborative tools in teaching – most notably Microsoft Lync – meant that demand for WiFi was rocketing. Aruba Networks won the selection – being one of three vendors pre-selected by the Uninett organization as worthy contenders.
“ Lync Online是我们的主要驱动力之一，” Hist ICT服务开发负责人ArntRichardRørvik说。“我们将其定位为在线讲座和播客的其他目的，我们的野心是在教学上使用更多的多媒体，并在一定程度上转移到开放式办公室，这将需要大量高质量的带宽。我们的一所姊妹大学一直在其较旧的802.11N技术遇到问题，但是Aruba’s 11ac补救措施为我们提供了许多11G/N的缺陷，例如使用MIMO和光束形成，使客户以明智的方式做出反应。”
We haven’t seen any other technology giving such easy access. It is superior at making the basic things simple and is more of a one-stop shop.
ArntRichardRørvik，ICT服务的发展主管，历史
同时，Hist团队面临BYOD的挑战。用户带来了越来越多的无线设备，但Hist的原始无线网络无法以不同的方式对待不同的客户类型。这意味着他们只能为最常见的设备和最基本的网络功能配置。
“例如，Windows电话和Apple设备在DHCP方面的行为有所不同，因此很难找到适合使用我们以前的无线系统的配置。”“我们本可以为苹果定固定它，但这会为他人打破。Aruba似乎是从头开始构建的，以便以不同的方式处理不同类型的设备。”
When the HiST team met Aruba Networks it was a revelation: not only could Aruba supply 11ac equipment, but its controllers could recognise different devices and profile each one appropriately for the best wireless performance. “We never thought we would need anything other than the current vendor,” says Rørvik. “But then we met Aruba and we thought, ‘Wow, is it really that simple to differentiate between clients, or even set policies by client type?!’”
Hist计划用Aruba替换其所有旧的无线网络并限制Rogue AP，并与基于其建筑物的公司达成协议，以使用该大学的WiFi，从而减少了他们的虚拟网络将其带入自己的物理网络。
“We have a lot of buildings – too many!” says Rørvik. “We have about 80,000 square metres over eight campuses, including four central hubs, and around 12,000 full and part-time students.” To make it even more challenging, many of those buildings are in the centre of Trondheim, HiST’s home city, so there is plenty of interference from other wireless networks.
Rørvik指出：“我们在2001年的第一次无线部署运转良好，但仅覆盖了该地区的50％，而且覆盖范围的不同，取决于谁进行了部署和建筑物的性质。”“用户在抱怨，学生的调查显示不满意，因此要求对100％的覆盖范围，并进行一次签名。下一个称为无线历史记录1.0的无线系统将赌注提高到100％的面积覆盖范围，足够的礼堂能力，最多350名学生同时工作。
By the time the new project – called Wireless HiST 2.0 – is complete in 2015, Rørvik expects to have around 1000access points(APs) installed, including several远程AP（说唱）在员工的房屋中：“如果Hist为员工的带宽付费，他们应该安装AP，最终我们将在Trondheim上获得更多的无线覆盖范围，”他说。“我们之前也有很多SSIDS，并希望将其减少到两个 - 我们实际上将其降低到三个。”
He continues: “Our BYOD project is now going way beyond what we had planned to begin with, it’s both on and off-site. QoS is very important though – for example, VMware and other BYOD technology works very well for getting Windows applications to Mac users on-site, but not off-site because there is no QoS, so I expect some students will prefer to work on campus.”
所有历史新的APS是11ACnow. “It’s just the right time to go for 11ac – it’s in all the new portables and smartphones,” Rørvik explains. “You had a lot of voluntary features in 11n, they are mostly compulsory in 11ac. For example, 5GHz is compulsory so there’s a lot more channels and less interference.” The ability to profile client devices also helps here – HiST still provides 2.4GHz coverage, but the Aruba controllers will direct clients that it knows are 5GHz-capable to prefer that band.
TheAruba controllersErik Hammervold说，还通过允许给出一些设备的私人地址解决了迫在眉睫的IP地址紧缩。他解释说：“我们随时都有3000个设备在线 - 学生一直在重写期望 - 因此，就像世界耗尽IP地址一样，我们也是如此。”“我们现在可以说，只读电子邮件的设备不那么重要，因此，例如，您的iPad不需要公共IP地址，并且可以使用NAT。”
历史had already done some groundwork ahead of the Aruba installation, for example scrapping a lot of older cabling and replacing it with CAT6 cable, and ensuring that new buildings have CAT7 cores with CAT6 termination. “It means we can serve two times 1Gbit/s with current termination kit, and have the possibility of 10Gbit/s in the future. We can also replace the APs in five years time without replanning the coverage,” Hammervold explains.
He adds that, in some ways, the biggest challenge posed by the new Aruba network was just how massively capable it is. For instance, he says that “installingClearPass需要很多思考，不是因为这是一个问题，而是因为它具有很多功能，并且可以做很多事情。如果您有野心 - 如果您安装ClearPass，则应该重新考虑您的网络。这是与我们目前的思科供应商不同的思考方式。这意味着当客户移动时，网络必须遵循。重要的是，哪种用户正在访问网络 - 您必须考虑要提供的服务，在这里，您将从拥有一个好的本地合作伙伴中受益匪浅。”
Rørvik agrees, concluding: “We haven’t seen any other technology giving such easy access. It is superior at making the basic things simple and is more of a one-stop shop. With other suppliers, we would need more boxes or third-party gear.”
有关案例研究查询，请联系：contact.aruba.emea@hpe.com
