Hi,
On 2014年11月29日 02:04, Clément Rault wrote:
> Hi,
>
> On 28 November 2014 at 02:23, Yusuke Iwase <[email protected]> wrote:
>> Hi,
>>
>>
>> OpenFlow1.3 Spec describes watch_port/watch_group as follows.
>>
>> /* Bucket for use in groups. */
>> struct ofp_bucket {
>> ...
>> uint32_t watch_port; /* Port whose state affects whether this
>> bucket is live. Only required for fast
>> failover groups. */
>> uint32_t watch_group; /* Group whose state affects whether this
>> bucket is live. Only required for fast
>> failover groups. */
>> ...
>> }
>>
>> So, if the watch_port/watch_group is down, a bucket which includes
>> this port and/or group can NOT be a candidate for forwarding.
>
> I'm not sure that I understand very well how the state of a group can
> be measured. For a port I can understand that we look if the link
> connected to this port is up or down but I don't see how it can be
> done for a group?
I don't know how to confirm which bucket is selected just now by switches.
But switches report the port status (up or down) by using OFPPortStatus
messages and so on,
So I guess you can estimate which bucket is a candidate for forwarding.
>
>> Currently, the curl command of ofctl_rest.py is not compatible with masked
>> vlan tags.
>> But now, we are making patches to support it.
>> Please wait for the patches release.
>
> Ok thanks, and when do you expect to release the patches?
We posted the patches last week, and the patches are marged by Ryu-devel.
So you can receive it on next Ryu release (version 3.16 maybe) in early this
month.
>
> If I understood well if I push these rules:
> $ curl -X POST -d '{
> "dpid": 1,
> "type": "FF",
> "group_id": 1,
> "buckets": [
> {
> "watch_port": 2,
> "actions": [
> {
> "type": "OUTPUT",
> "port": 2
> }
> ]
> }
> {
> "watch_port": 3,
> "actions": [
> {
> "type": "OUTPUT",
> "port": 3
> }
> ]
> }
> ]
> }' http://localhost:8080/stats/groupentry/add
>
> $ curl -X POST -d '{
> "dpid": 1,
> "match":{
> "nw_dst": "11.0.0.2",
> "eth_type": 2048
> },
> "actions":[
> {
> "type":"GROUP",
> "group_id": 1
> }
> ]
> }' http://localhost:8080/stats/flowentry/add
>
> the switch 1 will send the packet that have for destination 11.0.0.2
> out through the port 2 if the link connected to port 2 is working and
> out through the port 3 (if the link connected to port 2 is not working
> and the one connected to port 3 is working). Right?
I think it's right.
OpenFlow Spec describes like as follows.
-------
OpenFlow1.3.4 Spec:
5.6.1 Group Types
-------
...
- Optional: fast failover: Execute the first live bucket. Each action bucket
is associated with
a specific port and/or group that controls its liveness. The buckets are
evaluated in the order
defined by the group, and the first bucket which is associated with a live
port/group is selected.
...
-------
Thanks
>
> Thanks,
>
> Best,
> Clément
>
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