System and method of using undirectional links for tap aggregation

Patent metadata

Field	Value
Publication number	US-10103850-B2
Application number	US-201514697536-A
Country	US
Kind code	B2
Filing date	Apr 27, 2015
Priority date	Dec 22, 2014
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A method and apparatus of a network element that keeps a port of the network element up in a split port configuration is described. In an exemplary embodiment, the network element receives an indication of a link loss on a receive interface of the port, wherein the port includes the receive interface and a transmit interface. In addition, the receive interface is coupled to a first device over a first link, and the transmit interface is coupled to a second device over a second link. Furthermore, the network element performs an operation of the port such that a link coupled to a transmit interface of the port remains up. The network element additionally suppresses receive faults that are received on the receive interface.

First claim

What is claimed is:

1. A network element including a non-transitory machine-readable medium having executable instructions to cause one or more processing units to perform a method to keep a port of a network element up in a split port configuration, the method comprising:
receiving an indication of a link loss on a receive interface of the port, wherein the port is a bidirectional port that includes the receive interface and a transmit interface, and the receive interface is coupled to a port of a first device and the transmit interface is coupled to port of a second device;
in response to receiving the indication of the link loss, performing an operation of the port such that a transmit link coupled to a transmit interface of the port remains up despite the link loss indication received on the receive interface of the port, wherein the performing the operation comprises,
performing a loopback internal to the port.

2. The network element of claim 1 , wherein the internal loopback is a loopback of data between the receive and transmit interfaces within the port.

3. The network element of claim 1 , wherein the method further comprises:
dropping the loopback data.

4. The network element of claim 1 , wherein the method further comprises:
stopping the internal loopback if the link loss on the receive interface is repaired or back up.

5. The network element of claim 1 , wherein the network element is a tap aggregation network element.

6. The network element of claim 1 , wherein the second device is a data analyzer and a flow of network data from the first device to the data analyzer is unidirectional.

7. The network element of claim 6 , wherein the flow of network data includes network data that is mirrored from network data transmitted by the second device.

8. A network element including a non-transitory machine-readable medium having executable instructions to cause one or more processing units to perform a method to keep a port of a network element up in an event of a fault indication, the method comprising:
receiving a receive fault indication on a receive interface of the port; and
in response to receiving the fault indication on the receive interface of the port,
suppressing the receive fault indication; and
transmitting data on a transmit interface of the port, wherein the receive interface is coupled to a first device and the transmit interface is coupled to a second device, and the first and second device are different devices.

9. A network element that keeps a port of a network element up in a split port configuration, the network element comprising:
the port that is a bidirectional port and including a receive interface and a transmit interface, the receive interface is coupled to a first link and the port receives an indication of a link loss on receive interface; and
a set of instructions stored in memory coupled to the port that, in response to receiving the indication of the link loss, performs an operation of the port such that a transmit link coupled to a transmit interface of the port remains up despite the link loss indication received on the receive interface of the port, wherein the performing the operation comprises,
performing a loopback internal to the port.

10. The network element of claim 9 , wherein the internal loopback is a loopback of data between the receive and transmit interfaces within the port.

11. The network element of claim 9 , wherein the loss module further drops the loopback data.

Assignees

• Arista Networks Inc

Inventors

• Chandra Subhachandra
• Cheremisov Timur
• Odear Iii Robert Murray
• Peach John

Classifications

• H04L1/243 Primary

  at the transmitter, using a loop-back · CPC title

• H04L43/50

  Testing arrangements · CPC title

• H04L49/30

  Peripheral units, e.g. input or output ports · CPC title

• H04L43/0811

  by checking connectivity · CPC title