Hi Paul, Question 1 By physical addresses you mean the routable public IPs that form the tunnel src and tunnel dst addresses?
In my use case there is a GRE traffic that is originating from 5G mobiles and is received by the N3IWF (wifi gateway) as shown in the below topo. The GRE traffic generated by UE is over IPSEC (the GRE pkts have ESP encap). In the production, there can be several thousands of 5G UEs that generate gre-over-ipsec traffic that will terminate on a single p2mp (multipoint) GRE interface on the N3IWF gateway as shown below. Question 2 Since GRE is always encapsulated in IPSEC tunnel, do we still need to need to map the GRE tunnel addresses to physical addresses. I thought we would not be need GRE physical addresses in our use-case as there is the IPSEC that is always outermost hdr and would be used for routing Topo ================ UE ------(gre-over-ipsec traffic)----------N3IWF On Wed, Dec 23, 2020 at 10:12 AM Paul Vinciguerra < pvi...@vinciconsulting.com> wrote: > Hi Vijay, > > How are you planning to map the tunnel addresses to the physical addresses? > > On Tue, Dec 22, 2020 at 9:04 PM Vijay Kumar <vjkumar2...@gmail.com> wrote: > >> Hi Paul, >> >> Thanks for the information. >> >> Your script is talking about nhrp protocol. >> Is NHRP protocol mandatory to support mGRE? >> >> >> Regards >> >> On Wed, 23 Dec 2020, 01:24 Paul Vinciguerra, <pvi...@vinciconsulting.com> >> wrote: >> >>> Hi Vijay. >>> >>> Does this help any? >>> https://github.com/vpp-dev/vpp/blob/master/test/test_gre.py#L998 >>> >>> >>> On Tue, Dec 22, 2020 at 12:47 PM Vijay Kumar <vjkumar2...@gmail.com> >>> wrote: >>> >>>> Hi, >>>> >>>> Can someone help me understand if multipoint GRE (one gre interface >>>> that can communicate with multiple peers) is supported in the fd.ip GRE >>>> plugin? >>>> >>>> If yes, could you please share with me an example config for >>>> multi-point GRE. In the fd.io wiki pages, I am only seeing *p2mp >>>> *configuration >>>> (point to multipoint) for IP-in-IP but not for GRE >>>> >>>> >>>> Please share me an example config that I can use to test >>>> >>>> >>>> Regards >>>> >>>> >>>> >>>>
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