On 15/01/2013 18:09, Ben Ward wrote: > I've been doing some research on the benefits of an LNS and would > appreciate some advice if anyone has 20 minutes to spare on Thursday. I > see there was the AQL workshop back in 2011, so hopefully people can > remember that far back. Mostly I'm looking at aggregating DSL/FTTP/FTTC > type end users, some for Internet access, some into private networks, > and considering also connecting M2M devices.
A Cisco 2911 (plus SL-29-DATA-K9 license) and a *nix box with FreeRADIUS will get you going but do you have an idea of how much traffic / total number of sessions? For example, the 2911's IDB (interface descriptor block) limit of 1400 will affect scale but I can't imagine getting upto anything over a few hundred sessions on that size of box. You're more likely to top the CPU out with traffic or service-policy shapers before hitting session limits. A 7201 is more suited to the task but are end-of-sale so you really need to be looking at the ASR1000 (if buying Cisco). http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6549/ps6587/prod_white_paper0900aecd8066d3f5.html makes good reading but figures are for the older generation of ISR's. MPD on FreeBSD coupled with BIRD is also worth a serious look if you want to roll-your-own. Or Mr Kennard's Firebrick! Rich.
