Hi Guys,
A bit more information
The physical interface doesn't report drops on the switch as can be seen
below.
So, does it mean that ovs-ofctl reports only those drops as observed on the
interface?
Any clarification is welcome.
s33-eth2 Link encap:Ethernet HWaddr 42:24:f0:68:66:a6
inet6 addr: fe80::4024:f0ff:fe68:66a6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:403525 errors:0 dropped:0 overruns:0 frame:0
TX packets:885385 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:26654391 (26.6 MB) TX bytes:33618974995 (33.6 GB)
s44-eth1 Link encap:Ethernet HWaddr 76:33:db:b5:44:6f
inet6 addr: fe80::7433:dbff:feb5:446f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:885385 errors:0 dropped:0 overruns:0 frame:0
TX packets:403525 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:33618974995 (33.6 GB) TX bytes:26654391 (26.6 M
Cheers!
Durga
On Thu, Dec 8, 2016 at 2:03 PM, durga <[email protected]> wrote:
> Hi All,
>
> I have configured a very basic topology in mininet with 2 switches and a
> couple of hosts.
> I have configured tc on all the 4 ports of both the switches and set the
> tc rate set at 1Mbps. Qdisc is htb.
>
> Now, as I incrementally generate traffic , though I observe drops via
> iperf, I fail to observe any drops on ovs portswhen I use 'ovs-ofctl
> dump-ports sw'
>
> Am I looking at wrong places are putting things together incorrectly?
>
> Can someone help me understand why I don't notice any drops when using
> ovs-ofctl ?
>
> Few logs:
>
> UDP client:
> root@vd-Veriton-M200-A780:~# iperf -c 10.0.0.2 -u -b 10Mbps
> ------------------------------------------------------------
> Client connecting to 10.0.0.2, UDP port 5001
> Sending 1470 byte datagrams
> UDP buffer size: 208 KByte (default)
> ------------------------------------------------------------
> [ 15] local 10.0.0.1 port 53217 connected with 10.0.0.2 port 5001
> [ ID] Interval Transfer Bandwidth
> [ 15] 0.0-10.0 sec 12.5 MBytes 10.5 Mbits/sec
> [ 15] Sent 8922 datagrams
> [ 15] Server Report:
> [ 15] 0.0-11.5 sec 10.7 MBytes 7.78 Mbits/sec 0.503 ms 1306/ 8921
> (15%)
> [ 15] 0.0-11.5 sec 1 datagrams received out-of-order
>
>
> OVS output:
>
> root@vd-Veriton-M200-A780:~# ovs-ofctl dump-ports s33
> OFPST_PORT reply (xid=0x2): 3 ports
> port LOCAL: rx pkts=0, bytes=0, drop=5, errs=0, frame=0, over=0, crc=0
> tx pkts=0, bytes=0, drop=0, errs=0, coll=0
> port 1: rx pkts=885787, bytes=33619595672, drop=0, errs=0, frame=0,
> over=0, crc=0
> tx pkts=403525, bytes=26653335, drop=0, errs=0, coll=0
> port 2: rx pkts=403521, bytes=26652615, drop=0, errs=0, frame=0,
> over=0, crc=0
> tx pkts=884488, bytes=33617623003, drop=0, errs=0, coll=0
>
>
> TC qdsic output:
>
> root@vd-Veriton-M200-A780:~# tc -s -d class show dev s33-eth2
> class htb 2:1 root prio 0 quantum 100000 rate 8Mbit ceil 8Mbit linklayer
> ethernet burst 1600b/1 mpu 0b overhead 0b cburst 1600b/1 mpu 0b overhead 0b
> level 0
> Sent 25232342 bytes 16683 pkt (dropped 1307, overlimits 0 requeues 0)
> rate 0bit 0pps backlog 0b 0p requeues 0
> lended: 12183 borrowed: 0 giants: 0
> tokens: 15781 ctokens: 15781
>
> Cheers!
> Durga
>
>
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