commit | c400bed3fe9790f00629d0be5c157a66f1723b4f | [log] [tgz] |
---|---|---|
author | Shad Ansari <shad@opennetworking.org> | Tue Jul 03 07:42:52 2018 +0000 |
committer | Shad Ansari <shad@opennetworking.org> | Tue Jul 03 07:42:52 2018 +0000 |
tree | 2b9e896b2f1ff916c846a3535e3e1af3b6e09ef4 | |
parent | 905b840780917b14931ce9de8e200e8493fa39b4 [diff] |
VOL-1030 Ignore bulk flow update if OLT is operational down. This seems to fix voltha from 'hanging' when the openolt driver is killed. Not entirely certain why - but it appears that, when the gRPC connection is lost, the logical device's state is made to be down. This causes ONOS to delete flows trigerring the bulk flow update to the adapter. The adapter attempts to make gRPC calls to the driver which fail after connection timeouts. Likely twisted thread is busy with the flow programming causing voltha to hang. Change-Id: I9f07479f85ce2bf6cffe40c663581c013c897495
Voltha aims to provide a layer of abstraction on top of legacy and next generation access network equipment for the purpose of control and management. Its initial focus is on PON (GPON, EPON, NG PON 2), but it aims to go beyond to eventually cover other access technologies (xDSL, Docsis, G.FAST, dedicated Ethernet, fixed wireless).
Key concepts of Voltha:
Control and management in the access network space is a mess. Each access technology brings its own bag of protocols, and on top of that vendors have their own interpretation/extension of the same standards. Compounding the problem is that these vendor- and technology specific differences ooze way up into the centralized OSS systems of the service provider, creating a lot of inefficiencies.
Ideally, all vendor equipment for the same access technology should provide an identical interface for control and management. Moreover, there shall be much higher synergies across technologies. While we wait for vendors to unite, Voltha provides an increment to that direction, by confining the differences to the locality of access and hiding them from the upper layers of the OSS stack.
While we are still at the early phase of development, you can check out the BUILD.md file to see how you can build it, run it, test it, etc.
Contributions, small and large, are welcome. Minor contributions and bug fixes are always welcome in form of pull requests. For larger work, the best is to check in with the existing developers to see where help is most needed and to make sure your solution is compatible with the general philosophy of Voltha.