Make sure you are only using one of the following at any time:
1. Mininet’s TCIntf/TCLink (—link tc)
2. ovs’s queuing
3. manual tc commands
> On Jan 26, 2016, at 7:12 AM, Simone Cordella <simonecordell...@gmail.com>
> wrote:
>
> Hi,
>
> I'm having problems with queue and QoS, I'm working with mininet on this
> topology:
>
> h1---------
> s1-------s2--------h3
> h2--------
>
> h1 and h2 are connected on the switch s1 and host h3 is connected to switch
> s2, in particular h3 is connected on port s2-eth1 on the switch s2, and the
> switch s1 is connected on the port s2-eth2, all the links are 100Mb/s, the
> version of ovs that I’m using is 2.4.0.
>
> I want to create a queue on port s2-eth2 in order to limit the rate at 3Mb/s,
> so for first i create the qos on port s2-eth2 and after that I create the
> queue, finally i insert the flow entry in order to connect the packet flow to
> the queue, to do this i use this sequence of command:
>
> ovs-vsctl -- set Port s2-eth2 qos=@newqos -- --id=@newqos create QoS
> type=linux-htb
> ovs-vsctl -- add QoS s2-eth2 Queue 1=@queue -- --id=@queue create Queue
> other-config:max-rate=3000000
>
> when I run the command:
>
> ovs-vsctl list qos
> ovs-vsctl list queue
> ovs-vsctl list port s2-eth2 qos
>
> the result is:
>
> _uuid : 1d1e8a1a-e95a-420c-bff3-2012c2ea1188
> external_ids : {}
> other_config : {}
> queues : {1=20239989-e620-436a-a5f7-ce81fccf0369}
> type : linux-htb
> ------------------------------------------------
> _uuid : 20239989-e620-436a-a5f7-ce81fccf0369
> dscp : []
> external_ids : {}
> other_config : {max-rate="3000000"}
> ------------------------------------------------
> _uuid : ff9cf32a-41c5-4cd9-8e80-c31f71f5b6c2
> bond_active_slave : []
> bond_downdelay : 0
> bond_fake_iface : false
> bond_mode : []
> bond_updelay : 0
> external_ids : {}
> fake_bridge : false
> interfaces : [a8a1d572-c10a-4e96-a0b1-b5dbd128f880]
> lacp : []
> mac : []
> name : "s2-eth2"
> other_config : {}
> qos : 1d1e8a1a-e95a-420c-bff3-2012c2ea1188
> rstp_statistics : {}
> rstp_status : {}
> statistics : {}
> status : {}
> tag : []
> trunks : []
> vlan_mode : []
>
> So it seems that the qos, queue and port are well configured, after that i
> add this flow entry:
>
>
> ovs-ofctl add-flow s2
> priority=100,tcp,nw_dst=10.0.0.1,actions=set_queue:1,output:2
>
> so it should take all the tcp packet directed to h1(10.0.0.1) and insert them
> in the queue,but when i run an iperf test on mininet between h3 and h1 it
> gives this result:
>
> mininet> iperf h3 h1
> *** Iperf: testing TCP bandwidth between h3 and h1
> *** Results: ['90.0 Mbits/sec', '90.9 Mbits/sec']
>
> so the rate limiting of the queue is not applied otherwise the result of the
> iperf test would have been 3Mb/s.
>
> I tried also to insert the flow entry:
>
> ovs-ofctl add-flow s2 priority=100,tcp,nw_dst=10.0.0.1,actions=enqueue:2:1
>
> but the result is the same.
>
> There's something that i'm doing wrong?
> How i can resolve this problem?
>
> Many thanks in advance.
> Simone
>
>
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