On 29 March 2016 at 15:05, chip <chip.g...@gmail.com> wrote: > Juniper has a "This Week" book freely available that discussess, in detail, > the path of a packet through an MX. It's quite an informative read. > > http://www.juniper.net/us/en/training/jnbooks/day-one/networking-technologies-series/packet-walkthrough-mx-series/
I love that 'few milliseconds', only 3 orders of magnitude off. > This Week: An Expert Packet Walkthrough on the MX Series 3D provides the > curious engineer with a global view of the short life (a few milliseconds) > of packets inside the Juniper Networks MX Series of 3D routers. Technically not JNPR book, but reverse engineered by JNPR customer, which is bit of ironic that we have to do that. There is great internal Trio document (now dated) by Steven Wong. But it is really really good for external customers too. Who knows what gems they have I don't have any idea, which would have helped me avoid downtime or bad design choices. I would put in all future RFQ/RFP requirement for internal-level architecture documentation, since getting these otherwise is super hard. I don't understand why vendors don't publish these. Mentioned document has helped me countless time, to choose design which least exposes platforms compromises, to troubleshoot issue without bothering JTAC or helped me give JTAC precise troubleshooting information potentially cutting weeks of solution time and downtime of repeated problems. Lot of the good instrumentation is not exposed to end-users at all, like packet-via-dmem or capturing exception packets (you're getting CRC errors from IXP, which neighbour is to blame?, you're getting IP checksum errors from MPLS core, who is mangling them?). Traditionally very hard to answer questions become trivial with supplied instrumentation. -- ++ytti _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp