Juniper Networks, Inc.

Citrix Systems, Inc.

Mahesh Narayanan

Nayan S Patel

Vidur Gupta

Disclosed embodiments describe systems and methods for tunneling packets. A tunnel between a first intermediary device and a second intermediary device is established that encapsulates payload packets of transport layer connections between a client and a server. The first intermediary device identifies, from a first packet of a transport layer connection between the client and the server, packet header information. The first intermediary device populates a destination port and a source port of a header of a second packet to be transmitted via the tunnel. The destination port is populated with a predetermined destination port, and the source port includes a first hash of a tuple of the packet header information of the first packet. The second packet includes the first packet as a payload, and is load balanced across paths to the second intermediary device based on a second hash of the header of the second packet.

Encapsulating traffic entropy into virtual WAN overlay for better load balancing

In one example, an edge routing device of a service provider network includes one or more network interfaces configured to send and receive packets and a processing unit configured to retrieve, from a packet received via the one or more network interfaces, priority data from an Internet protocol (IP) header of the packet, form a first tag including a first set of data in a first priority field of the first tag, wherein the first set of data represents a first portion of the priority data, form a second tag including a second set of data in a second priority field of the second tag, wherein the second set of data represents a second portion of the priority data, encapsulate the packet with the first tag and the second tag, and forward, via the one or more network interfaces, the encapsulated packet.

Signaling priority information for encapsulated packets

Techniques are described for applying double experimental (EXP) quality of service (QoS) markings to Multiprotocol Label Switching (MPLS) packets. According to the techniques, an edge router of an MPLS network is configured to map a Differentiated Services Code Point (DSCP) marking for customer traffic to at least two EXP fields of at least two different labels included in a MPLS packet encapsulating the customer traffic. In this way, the edge router may map the full DSCP marking across the first and second EXP fields to provide full resolution QoS for the customer traffic over the MPLS network. The techniques also include a core router of an MPLS network configured to identify a QoS profile for a received MPLS packet based on a combination of a first EXP field of a first label and a second EXP field of a second label included in the MPLS packet.

Double experimental (EXP) quality of service (QoS) markings for MPLS packets

In a system including a first autonomous system (AS) configured to have a first gateway router forward data associated with a set of IP address prefixes, to a second AS via a link to a first eBGP peer device of the second AS, the problem of data packets dropped at an output of the first gateway router while the link is still 'up' and an eBGP session between the first gateway router and the first eBGP peer is still up, is solved by (1) receiving information about dropped data packets at an output of the first gateway router, (2) determining whether a data traffic offload condition exists using the received information, (3) changing path attribute(s) of at least some of the IP address prefixes of the set if a data traffic offload condition exists, such that the first gateway router will be less likely to forward data associated with those IP address prefixes, and (4) generating a BGP update message including the changed path attribute(s) for communication to at least one iBGP peer device in the first AS.

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San Jose, CA, United States of America

Mahesh Narayanan