Sunnyvale, CA, United States
Sunnyvale, CA, United States

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Techniques are described for enhancements to multicast Label Distribution Protocol (mLDP) to support multicast only fast re-route (MoFRR) over a remote loop free alternate (RLFA) backup path. An egress router is configured to generate a modified mLDP control message to signal the RLFA backup path in which an address of a RLFA node is included in an LSPRoot field and an address of an ingress router is included in an opaque data field. In addition, the RLFA node of the RLFA backup path is configured to recognize that it is identified in the LSPRoot field of the modified mLDP control message, and, in response, look up the ingress router identified in the opaque data field of the modified mLDP control message. The RLFA node is further configured to send an mLDP control message that includes the address of the ingress router in the LSPRoot field towards the ingress router.


In some embodiments, an apparatus includes an optical transceiver that includes a first set of electrical transmitters operatively coupled to a switch. Each electrical transmitter from the first set of electrical transmitters is configured to transmit an electrical signal from a set of electrical signals. In such embodiments, the switch is configured to switch an electrical signal from the set of electrical signals such that the set of electrical signals are transmitted via a second set of electrical transmitters. Each electrical transmitter from the second set of electrical transmitters is operatively coupled to an optical transmitter from a set of optical transmitters. The set of optical transmitters is operatively coupled to an optical multiplexer. In such embodiments, at least one electrical transmitter from the second set of electrical transmitters is associated with a failure within the optical transceiver.


Patent
Juniper Networks Inc. | Date: 2017-04-05

Techniques are described for enhancements to Protocol Independent Multicast (PIM) to support multicast only fast re-route (MoFRR) over a remote loop free alternate (RLFA) backup path in a network. This disclosure describes a modified PIM control message having a new PIM message type and an additional field to indicate an address of a RLFA network device in the RLFA backup path. According to techniques of this disclosure, network devices along the RLFA backup path are configured to forward the modified PIM control message toward the RLFA network device instead of toward a source of a requested multicast group. When the RLFA network device receives the modified PIM control message, the RLFA network device is configured to forward a conventional PIM control message towards the source of the requested multicast group. In this way, PIM can be used to provide MoFRR over a RLFA backup path.


Techniques are described that enable MAC (L2) address authentication within an L2 switching network, such as a metro transport network. Moreover, when used in an EVPN, the techniques provide fine grain policy control over the L2 switching network so as to enable carrier networks to specify and control topologies for transporting packet-based communications. Access routers of the EVPN communicate utilizes enhanced EVPN MAC route advertisements that include an additional attribute indicating a request that L2 network address(es) being advertised be validated by a network address authentication device. A route controller relays the EVPN MAC advertisement upon validation of the L2 networks address. Moreover, the route controller may utilize the EVPN MAC route advertisements to distribute MAC-level policies to control topologies and MAC learning within the EVPN and provide services such as per-MAC traffic quota limits.


In some embodiments, an apparatus includes a first optical transceiver. The first optical transceiver includes a set of optical transmitters, an optical multiplexer operatively coupled to the set of optical transmitters, and a variable optical attenuator operatively coupled to the optical multiplexer. The variable optical attenuator is configured to receive a control signal from a controller of the first optical transceiver and modulate a signal representing control information with an output from the optical multiplexer. The control information is associated with the control signal and for a second optical transceiver operatively coupled to the first optical transceiver.


Patent
Juniper Networks Inc. | Date: 2017-02-08

An optical device may include a modulator. The modulator may receive an optical signal. The modulator may modulate the optical signal to include a first channel and a second channel. The modulator may modulate the optical signal based on a training pattern associated with detecting a skew. The modulator may cause the first channel to interfere with the second channel. The modulator may perform a power measurement on the first channel and the second channel. The modulator may determine the skew based on the power measurement and the training pattern. The modulator may time delay the first channel or the second channel to align the skew based on the skew.


Patent
Juniper Networks Inc. | Date: 2017-04-05

In general, techniques enable an intermediate router to perform node protection for one or more other PE routers operably coupled to the intermediate router in active-active mode in an EVPN. The techniques may include configuring the intermediate router, which is positioned within an a service provider network between a remote provide edge router and at least two provider edge (PE) routers operating in active-active mode in an Ethernet Virtual Private Network (EVPN), to operate in a passive mode in which the intermediate router detects Ethernet Auto-Discovery (AD) routes without performing layer two (L2) address learning for the EVPN. The techniques may include installing a primary route to a protected router and a backup route from the intermediate router to a PE router other than the protected router, and in response to a link failure, forwarding network traffic using the backup route without requiring reprogramming the forwarding unit.


Patent
Juniper Networks Inc. | Date: 2017-04-05

In one example, an autonomous system boundary router (ASBR) forms part of a first autonomous system (AS). The ASBR is between a first provider edge (PE) router of the first AS and a second PE router of a second, different AS. The first PE router and the second PE router form a Multiprotocol Label Switching (MPLS) path. The ASBR includes an interface communicatively coupled to a routing device external to the first AS, a memory configured to store a forwarding table associated with the interface, and one or more processing units configured to receive a packet via the interface, determine that the packet is encapsulated by an MPLS label, select a forwarding table based on the interface by which the packet was received, and forward the packet according to forwarding information of the forwarding table when the forwarding table includes the MPLS label.


Patent
Juniper Networks Inc. | Date: 2017-02-01

In some embodiments, an apparatus includes a network device configured to receive an anomaly database of a first image that stores a set of differences between the first image and a base image. The network device is configured to compare the anomaly database of the first image with an anomaly database of a second image storing a set of differences between the second image and the base image to determine if the first and second images include at least one incompatible critical feature or incompatible non-critical feature. The network device is configured to send a signal associated with a first action if the first and second images include the at least one incompatible critical feature. The network device is configured to send a signal associated with a second action different from the first action if the first and second images include the at least one incompatible non-critical feature.


Patent
Juniper Networks Inc. | Date: 2017-04-05

One example method includes receiving, by a central analytics system, a query for traffic flow data associated with a geographically distributed network of network devices, outputting, by the central analytics system, the query to a plurality of analytics pods, wherein each of the plurality of analytics pods is coupled to a storage unit of a network device within the geographically distributed network, and, responsive to outputting the query, receiving, by the central analytics system and from the plurality of analytics pods, results of the query, wherein the results include at least the traffic flow data from the plurality of analytics pods based on the query.

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