On 10 May 2014, at 2:28 pm, Tyler Christiansen <[email protected]> wrote:
> Look at it from the perspective of where the traffic is entering the LSP, > not the perspective of the router. > > When the traffic is encapsulated (enters the LSP), that's the ingress LSP. > When a packet leaves an LSP, that is the egress LSP. The fact that it > enters or exits the router (and where it does so) is inconsequential in the > context of discussing the direction of an LSP. Following on from Tyler's points, think also on the fact that an LSP is uni-directional - ingress for the head-end where the LSP is signalled from and where traffic enters and egress for the termination point where traffic exits. > On Fri, May 9, 2014 at 8:23 PM, John Neiberger <[email protected]> wrote: > >> I just took a Juniper MPLS and VPNs course and I have a question about the >> ingress and egress types of LSPs. The terminology makes zero sense to me. >> The LSP that is used to send traffic is called the ingress LSP, and the LSP >> used to receive traffic is an egress LSP. How in the heck does that make >> any sense? It seems exactly backwards. From the perspective of the router, >> why would egress traffic leave on the ingress LSP and vice versa? >> >> This seems really odd, but I presume there must be a really good reason for >> it. >> >> John >> _______________________________________________ >> juniper-nsp mailing list [email protected] >> https://puck.nether.net/mailman/listinfo/juniper-nsp >> > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
