Cisco Technology, Inc.

Vinay Parameswarannair

Rajagopalan Janakiraman

Chia Alex Tsai

Shyam N Kapadia

Nilesh Shah

Pags Krishnamoorthy

Yibin Yang

Alex Tsai

Sanjay Kumar Hooda

Vijay Sampath

Yang Yibin

In one embodiment, a copy of an original packet of a traffic flow is created at an ingress leaf node of a cloud switch. The ingress leaf node forwards the original packet along a less-specific path through the cloud switch, the less-specific path based on a domain index of an egress domain for the original packet. The copy of the original packet is modified to create a more specific path learn request packet. The ingress leaf node forwards the more specific path learn request packet along the less-specific path through the cloud switch. The ingress leaf node received back a more specific path learn request reply packet that includes an indication of a fabric system port. The ingress leaf node then programs a forwarding table based on the indication of the fabric system port, to have subsequent packets of the traffic flow forwarded along a more-specific path.

MSDC scaling through on-demand path update

In some embodiments, a data packet may be received at a leaf switch. A port-channel associated with a destination port for the data packet may be identified, and the data packet may be transmitted to the destination port via the identified port-channel.

Two-stage port-channel resolution in a multistage fabric switch

Embodiments provide techniques for optimizing paths in a network environment with a virtual network device that includes a first physical network device and a second physical network device, connected using a virtual network device layer link. Embodiments receive a first data packet belonging to a first data flow, at the first physical network device, from the second physical network device, over the virtual network device layer link. An adjacent network device from which the second physical network device received the first data packet is determined. Embodiments also determine one or more links connecting the first physical network device and the adjacent network device. A network message is transmitted to the adjacent network device, where the adjacent network device is configured to transmit subsequent data packets from the first data flow to the virtual network device, using only the determined one or more links, responsive to receiving the network message.

Path optimization in multi-node virtual switch with orphan ports

A segment within a virtual network is identified as being supported by a segment bundling device. The segment within the virtual network supports a first host connected to a first bridging device and a second host connected to a second bridging device. The segment bundling device is used to receive virtual network address information describing the virtual network segmentation identifier (ID) for the segment used for receiving virtual network traffic for the first and second host. A segment bundling table associating a bundle ID with the virtual network segmentation identifier based on the upper ID and the lower ID of the virtual network ID is generated by the segment bundling device. The segment bundling device is used to distribute the segment bundling table to traffic forwarding devices in the virtual network that interface with the first bridging device and the second bridging device.

Flexible and scalable virtual network segment pruning

An example method includes storing a portion of virtual PortChannel (vPC) information in a TRansparent Interconnect of Lots of Links network environment, deriving, from the portion of vPC information, a physical nickname of an edge switch to which a frame can be forwarded, and rewriting an egress nickname in a TRILL header of the frame with the physical nickname. In example embodiments, the vPC information can include respective vPC virtual nicknames, EtherChannel hash algorithms, hash values, and physical nicknames of edge switches associated with vPCs in the network environment. In some embodiments, the portion of vPC information can be derived from an Interested vPC Type Length Value (TLV) information of an Intermediate System to Intermediate System (IS-IS) routing protocol data unit (PDU).

Growing community of inventors

Milpitas, CA, United States of America

Vinay Parameswarannair