Juniper Networks, Inc.

Arunkumar P

Deepti Nirmalkumarji Rathi

A label switch router (LSR) in a label-switched path (LSP) may receive, from an ingress edge LSR, a Multi-Protocol Label Switching (MPLS) echo request, where the LSP includes a tunnel having details that are hidden by a Nil Forward Equivalency Class (FEC). The LSR may determine whether the LSR is an egress node for the tunnel in the LSP based at least in part on one or more labels in the MPLS echo request. The LSR may, in response to determining that the LSR is the egress node for the tunnel in the LSP, send an MPLS echo reply that indicates the LSR as being the egress node for the tunnel in the LSP.

Identifying egress of nil forward equivalency class (FEC) used for FEC hiding

A disclosed method may include (1) receiving, at a node within a network, an MPLS echo request from an additional node adjacent to the node, (2) determining that a FEC query is included in a FEC stack of the MPLS echo request and then, in response to determining that the FEC query is included in the FEC stack of the MPLS echo request, (3) determining at least one FEC that corresponds to a label included in a label stack of the MPLS echo request, and then (4) notifying the additional node of the FEC that corresponds to the label included in the label stack by sending, to the additional node, an MPLS echo reply that identifies the FEC that corresponds to the label. Various other systems, methods, and computer-readable media are also disclosed.

Systems and methods for facilitating traceroute operations across segment routing paths within networks

A static label-switched path (LSP) over which packets belonging to a forwarding equivalency class (FEC) are forwarded may be tested by (a) generating a multi-protocol label switching (MPLS) echo request message including a target FEC stack type-length-value (TLV), the target FEC stack TLV having a Nil FEC sub-TLV; and (b) sending the MPLS echo request message with a label stack corresponding to the FEC for forwarding over the static LSP. A static segment routed traffic engineered (SRTE) path, including at least two segments, over which packets belonging to a forwarding equivalency class (FEC) are forwarded, may be tested by (a) generating a multi-protocol label switching (MPLS) echo request message including, for each of the at least two segments, a target FEC stack type-length-value (TLV), each target FEC stack TLV having a Nil FEC sub-TLV; and (b) sending the MPLS echo request message with a label stack corresponding to the FEC for forwarding over the static SRTE path.

Growing community of inventors

Bengaluru, India

Arunkumar P