We're looking to upgrade our existing 6x 6800/Sup2T core with something a bit more beefy. We're running BGP/OSPF, MPLS, dual stacked v4/6, QinQ, a bunch of SPM, etc... This supports a user population of tens of thousands on the campus. There are some semi-independent IT groups on campus, so we serve both as an enterprise core and an ISP at times. Currently we're not hitting walls insofar as routes or forwarding speeds so much as forwarding DHCP requests and such. We have a massive wireless user base that can result in a lot of that traffic being concentrated. We're going to be bumping up from 1/10/40G to 10/40/100G at the core. Building switches aggregate directly into the core routers ATM. We have a mix of Cisco and Juniper in the access switch environment, so it's unlikely we'll be able to use too many fancy proprietary features outside of the cores and management isn't big on those anyway.
Cisco and Juniper are largely where we're looking and they are pointing us at the Nexus 7700 and MX960 lines (possibly also an ASR model soon). I gather Cisco doesn't have an offering in the Catalyst line currently they feel comfortable pushing for our environment.
Curious about the hows and whys people are going with Cisco/Juniper at the core in general. Within those brands, curious about specific models people like/hate and why. The kinds of things the SEs won't tell us. It isn't helping that the data sheets feel light on particulars beyond raw forwarding speeds.
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