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Dinesh Dutt was the guest speaker in the second Leaf-and-Spine Fabric Design session. After I explained how you can use ARP/ND information to build a layer-3-only data center fabric that still support IP address mobility Dinesh described the details of Cumulus Linux redistribute ARP functionality and demoed how it works in a live data center.
It will incorporate the technology with its Contrail platform.
Many operators conduct technology trials in hope that the results will contribute to the 5G standard.
This pure-play security company has been around for 28 years.
This is a second technical post related to segment-routing, I did a basic introduction to this technology on Juniper MX here;
Segment Routing on JUNOS – The basics
For this post I’m looking at something a bit more advanced and fun – performing Segment-routing traffic-engineering using an SDN controller, in this case OpenDaylight Beryllium – an open source SDN controller with some very powerful functionality.
This post will use Cisco ASR9kV virtual routers running on a Cisco UCS chassis, mostly because Cisco currently have the leading-edge support for Segment-routing at this time, Juniper seem to be lagging behind a bit on that front!
Lets check out the topology;
It’s a pretty simple scenario – all of the routers in the topology are configured in the following way;
The first thing to look at here is BGP-LS “BGP Link-state” which is an extension of BGP that allows IGP information (OSPF/ISIS) to be injected into BGP, this falls conveniently into the world of centralised path computation – where we can use a controller of some sort to look at Continue reading