Re: [spring] A note on CRH and on going testing

[SING Team <[e-mail]>]

Hi Andrew, Good to hear that reality experiment :) But is it secure to share internal SID-IP mappings outside a trusted network domain? Or is there an analogue like Binding SID of SRv6, in SRv6+? Btw, PSSI and PPSI can not do that now, right? Best regards, Moonlight Thoughts (mail failure, try to cc to spring again.) On 09/19/2019 17:49, Andrew Alston wrote: Hi Guys,  I thought this may be of interest in light of discussions around deployments and running code - because one of the things we've been testing is inter-domain traffic steering with CRH on both our DPDK implementation and another implementation.  So - the setup we used last night:  6 systems in a lab - one of which linked to the open internet.  Call these S1 -> S6  3 systems in a lab on the other side of the world - no peering between the networks in question.  Call these R1 -> R3  We applied a SID list on S1, that steered S1 -> S2 -> S3 -> S6 -> R1 -> R3, with the relevant mappings from the CRH SID's to the underlying addressing (S2 had a mapping for the SID for S3, S3 had a mapping for the SID corresponding to S6, S6 had a mapping for the SID corresponding to R1 etc)  Then we sent some packets - and the test was entirely successful.    What this effectively means is that if two providers agree to share the SID mappings - it is possible to steer across one network, out over an open path, and across a remote network.  Obviously this relies on the fact that EH's aren't being dropped by intermediate providers, but this isn't something we're seeing.  Combine this with the BGP signaling draft - and the SID's can then be signaled between the providers - work still going on with regards to this for testing purposes.  Just as a note - there would be no requirement to share the full SID mapping or topologies when doing this with BGP - the requirement would be only to share the relevant SID's necessary for the steering.  I can say from our side - with various other providers - this is something that we see *immense* use case for - for a whole host of reasons.  Thanks  Andrew  _______________________________________________  spring mailing list  [e-mail]  https://www.ietf.org/mailman/listinfo/Spring