1 I would deploy multiple areas in your IGP so that it can scale and keep the memory consuption to a minimum. There are many cisco reccommendations regarding the maximum number of devices per area.
2 Each VR will put a memory and CPU overhead on your router. Eventually you will hit the limit. I'm not sure if there is a software limit or if you keep adding until the machine crashes. Setup a nms to monitor the CPU and memory so you can pro-actively manage any additions to the box. Keep in mind one VR may consume more resources than others.
1/ In my opinion, For MPLS/VPN application, there's no area limited for cisco routers, you can use single area or multiareas as your network demand. But if you also want to develope MPLS/TE in your network, you should consider your IOS software version, because older version dose not support TE in multiareas.
2/ The major limit about numbers of VRFs on a single PE are the memory and the CPU powerhouse, especially the memory. Here's some memory caculate rule:
With XR 4.2.0 the ASR9000 is releasing a new line of hardware models. This amongst others is the RSP440, the next generation RSP with faster switch fabric along with Typhoon based Linecards, the next generation network processor.
The Cisco EPN system incorporates a network architecture designed to consolidate multiples services on a single Multiprotocol Label Switching (MPLS) transport network. This network is designed primarily based on...
Internet security is important with the increasing attacks that are happening every day. Many internet and browsing security solutions exist, but some are not very easy to use or maybe the question is how can I enable them?