公开(公告)号：US09860169B1

公开(公告)日：2018-01-02

申请号：US14869299

申请日：2015-09-29

Applicant: Juniper Networks, Inc.

Inventor： Samson P Ninan ,  Sushant Kumar ,  Reji Thomas

IPC: H04L12/741 ,  H04L12/54 ,  H04L12/66 ,  H04W40/34

CPC classification number: H04L45/74 ,  H04L12/56 ,  H04L12/66 ,  H04L45/02 ,  H04L45/66 ,  H04W40/34

Abstract: The techniques described herein may enable a particular PE router configured in an EVPN to share, rather than immediately discard, a CE router MAC address that is included in an IPv6 neighbor advertisement even though the particular PE router does not include a neighbor cache entry corresponding to the CE router. The techniques may include receiving, from a CE router that is locally coupled to the first PE router, an IPv6 neighbor advertisement from the CE router in response to an IPv6 neighbor solicitation from a second PE router that requested a MAC address of the CE router; determining whether an L2 destination addresses of the IPv6 neighbor advertisement match the L2 address of the bridging interface second PE router; and in response to determining a match, sending, to the second PE router, an EVPN route advertisement specifying at least the MAC address of the CE router.

公开(公告)号：US11765077B1

公开(公告)日：2023-09-19

申请号：US17719016

申请日：2022-04-12

Applicant: Juniper Networks, Inc.

Inventor： Kapil Arora ,  Samson P Ninan ,  Shraddha Hegde

IPC: H04L45/50 ,  H04L45/00 ,  H04L45/02

CPC classification number: H04L45/50 ,  H04L45/02 ,  H04L45/04 ,  H04L45/22

Abstract: Ping or traceroute functionality is supported in a path spanning multiple autonomous systems (ASes) having segment routing (SR) enabled, the path including an ingress node in a first autonomous system (AS) and an egress node in an AS other than the first AS, using a reverse path label pair including (1) a node segment identifier (SID) corresponding to an AS Border Router (ASBR) of the second AS (second ASBR), and (2) an egress peer engineering (EPE) SID corresponding to a segment between the second ASBR to an ASBR of the first AS (first ASBR). Responsive to receiving a ping or traceroute request by a router in the second AS, the router generates a ping or traceroute reply including the reverse path label pair. The ping or traceroute reply is forwarded to the second ASBR using the node SID of the reverse path label pair. The ping or traceroute reply is then forwarded from the second ASBR to the first ASBR using the EPE SID of the reverse path label pair. Finally, the ping or traceroute reply can be forwarded (e.g., using standard IP forwarding) from the first ASBR to the headend router.