Abstract stack ports to enable platform-independent stacking

Patent metadata

Field	Value
Publication number	US-10015074-B1
Application number	US-201615288446-A
Country	US
Kind code	B1
Filing date	Oct 7, 2016
Priority date	Nov 24, 2015
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

In one embodiment, a stack manager of an operating system on a network device configures an egress abstract stack port and an ingress abstract stack port, where the configuring maps one or more physical ports of the network device to a corresponding abstract stack port. The stack manager then transmits platform-independent egress stack discovery messages on the egress abstract port to a remote ingress abstract stack port of an adjacent stack member, and receives platform-independent ingress stack discovery messages on the ingress abstract port from a remote egress abstract stack port of an adjacent stack member. The stack manager may then provide platform-independent stacked network device operation using connectivity between the egress abstract stack port and remote ingress abstract stack port, and connectivity between the remote egress abstract stack port and ingress abstract stack port.

First claim

What is claimed is:

1. A method, comprising:
configuring, by a stack manager of an operating system on a network device, an egress abstract stack port and an ingress abstract stack port, wherein the configuring maps one or more physical ports of the network device to a corresponding abstract stack port;
transmitting, by the stack manager, platform-independent egress stack discovery messages on the egress abstract port to a remote ingress abstract stack port of an adjacent stack member;
receiving, by the stack manager, platform-independent ingress stack discovery messages on the ingress abstract port from a remote egress abstract stack port of an adjacent stack member; and
providing, by the stack manager, platform-independent stacked network device operation using connectivity between the egress abstract stack port and remote ingress abstract stack port, and connectivity between the remote egress abstract stack port and ingress abstract stack port.

2. The method as in claim 1 , wherein providing platform-independent stacked network device operation comprises:
providing one or more computer network services as a localized network domain spanning a plurality of stack members, wherein the plurality of stack members are logically a single logical network device.

3. The method as in claim 1 , wherein the stack manager on the network device is a stack master among a plurality of stack members.

4. The method as in claim 1 , wherein transmitting comprises:
sending the egress stack discovery messages to a forwarding platform of the network device, wherein the forwarding platform forwards the egress stack discovery messages on the one or more physical ports of the network device mapped to the egress abstract stack port.

5. The method as in claim 1 , wherein receiving comprises:
retrieving the ingress stack discovery messages from a forwarding platform receive queue for the one or more physical ports of the network device mapped to the ingress abstract stack port.

6. The method as in claim 1 , wherein configuring comprising:
receiving administrator commands via a command line interface (CLI).

7. The method as in claim 1 , wherein configuring comprises:
configuring the ingress abstract stack port based on receiving platform-independent ingress stack discovery messages on one or more particular physical ports of the network device, and mapping the one or more particular physical ports to the ingress abstract stack port.

8. The method as in claim 1 , wherein the network device is a stack member among a plurality of stack members, and wherein the plurality of stack members comprise a plurality of different device platforms.

9. The method as in claim 1 , wherein the one or more physical ports are selected from data ports and dedicated stack ports.

10. The method as in claim 9 , wherein at least one of the physical ports mapped to a corresponding abstract stack port is not a dedicated stack port.

11. The method as in claim 1 , further comprising:
providing a status of either of the ingress or egress abstract stack ports based on a status of the one or more physical ports of the network device mapped to the corresponding abstract stack port.

12. The method as in claim 11 , wherein the status of the one or more physical ports is selected from a group consisting of: link up; link down; and no-cable.

13. An apparatus, comprising:
a plurality of physical ports;
a processor coupled to the physical ports and adapted to execute one or more processes; and
a memory configured to store a stack manager process of an operating system executable by the processor, the process when executed operable to:
configure an egress abstract stack port and an ingress abstract stack port, wherein the configuring maps one or more of the plurality of physical ports to a corresponding abstract stack port;
transmit platform-independent egress stack discovery messages on the egress abstract port to a remote ingress abstract stack port of an adjacent stack member;
receive platform-independent ingress stack discovery messages on the ingress abstract port from a remote egress abstract stack port of an adjacent stack member; and
provide platform-independent stacked network device operation using connectivity between the egress abstract stack port and remote ingress abstract stack port, and connectivity between the remote egress abstract stack port and ingress abstract stack port.

14. The apparatus as in claim 13 , wherein the process when executed to provide platform-independent stacked network device operation is further operable to:
provide one or more computer network services as a localized network domain spanning a plurality of stack members, wherein the plurality of stack members are logically a single logical network device.

15. The apparatus as in claim 13 , wherein the process when executed to transmit is further operable to:
send the egress stack discovery messages to a forwarding platform of the apparatus, wherein the forwarding platform forwards the egress stack discovery messages on the one or more physical ports mapped to the egress abstract stack port.

16. The apparatus as in claim 13 , wherein the process when executed to receive is further operable to:
retrieve the ingress stack discovery messages from a forwarding platform receive queue for the one or more physical ports mapped to the ingress abstract stack port.

17. The apparatus as in claim 13 , wherein the process when executed to configure is further operable to:
receive administrator commands via a command line interface (CLI).

18. The apparatus as in claim 13 , wherein the apparatus is a stack member among a plurality of stack members, and wherein the plurality of stack members comprise a plurality of different device platforms.

19. The apparatus as in claim 13 , wherein the one or more physical ports are selected from data ports and dedicated stack ports.

20. A tangible, non-transitory, computer-readable media having software encoded thereon, the software, when executed by a processor on a network device, operable to:
configure an egress abstract stack port and an ingress abstract stack port, wherein the configuring maps one or more physical ports of the network device to a corresponding abstract stack port;
transmit platform-independent egress stack discovery messages on the egress abstract port to a remote ingress abstract stack port of an adjacent stack member;
receive platform-independent ingress stack discovery messages on the ingress abstract port from a remote egress abstract stack port of an adjacent stack member; and
provide platform-independent stacked network device operation using connectivity between the egress abstract stack port and remote ingress abstract stack port, and connectivity between the remote egress abstract stack port and ingress abstract stack port.

Assignees

• Cisco Tech Inc

Inventors

• Chandra Amit
• Sangiah Suresh
• Kembanur Natarajan Elangovan

Classifications

• H04L45/583

  Stackable routers · CPC title

• H04L45/64

  using an overlay routing layer · CPC title

• H04L45/02 Primary

  Topology update or discovery · CPC title