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by smutticus
5953 days ago
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I do actually work with devices like these. Not Cisco. Although I used to. But I work with equally monstrous packet movers from other vendors. I glanced at the released documentation a little. The thing to remember is that this is a multi-cabinet router for _really_ big telcos. It scales up to 1152 slots. Since a single shelf system is 16 slots. 1152 slots is 72 shelfs. Judging from the picture a rack can hold 2 shelves. So that's 36 racks for one router to do 322tbps. In the telco world it's all about density per-rack. Colo space is expensive and so is cooling and power. How much switching/routing capacity can you get in one rack? Well it looks like Cisco now has about 9tbps per-rack. Which is not bad but it puts things a bit more in perspective. Cisco also tends to measure their bandwidth a bit differently than us mortals. They take full-duplex line-rate and double it. I've seen them do this on previous products so I'm only assuming they've done this here. So what we really end up with is a router that does 4.5tbps full-duplex per-rack. Still not bad. But not as mind blowing a number as 322tbps. And not so far away from the competition either. |
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http://www.lightreading.com/document.asp?doc_id=188948&; With the upgrade, Cisco can run 140 Gbit/s per slot, with switching capacity of 4.48 Tbit/s per chassis. (The latter figure is doubled to count ingoing and outgoing traffic at the same time, as the industry tends to do.)
If you don't mind me asking what did you work on (juniper, ALU, etc.), and what exactly was your role ?
I work in support for the mobile core router side where we use carrier-grade routers but nothing as big as the big Internet core routers.