Hi Purnima,
I think you should try to match the flows on ip_tos
You can refer how the packets gets remarked in function "meter_entry_apply" of
"udatapath/meter_entry.c" (ofsoftswitch13)
uint8_t new_dscp = ((*pkt)->handle_std->proto->ipv4->ip_tos >> 5) -
band_header->prec_level;
(*pkt)->handle_std->proto->ipv4->ip_tos = (new_dscp << 5) |
((*pkt)->handle_std->proto->ipv4->ip_tos & 0x1f);
Regards,
Pradeep.V
From: Purnima Mohan [mailto:purnimamoha...@gmail.com]
Sent: Friday, May 24, 2013 2:24 PM
To: Voleti, Pradeep (HP Networking)
Cc: openflow-discuss
Subject: Re: [openflow-discuss] Openflow1.3 Metering with band type as
DSCP_REMARK
Hi Pradeep,
Thank you.
Now I have associated this meter to a flow (Switch2) in one side of the network
using the below command.
dpctl unix:/var/runs2.sock flow-mod cmd=add,table=0 in_port=1 meter:2
apply:output=2
I want to match field in the other side of the network say in Switch3 to match
the packets that are dscp marked. I saw a match field for dscp in github as
ip_dscp.I just don't know how to use it. Since I dint know what exactly happens
when the packets are marked. looks like the ToS value in the IP header will be
reduced by the value given by us in "prec_level=x", Am I right?
If so in the below command,
dpctl unix:/var/runs3.sock flow-mod cmd=add,table=0
in_port=3,eth_type=0x800,ip_dscp=y apply:output=1
What should be the value of ip_dscp=y when I give prec_level=x?
On Thu, May 23, 2013 at 7:05 PM, Voleti, Pradeep (HP Networking)
<pvol...@hp.com<mailto:pvol...@hp.com>> wrote:
Hi Purnima,
I think the command should be "dpctl unix:/var/runs2.sock meter-mod
cmd=add,flags=1,meter=2 dscp_remark:rate=10000,prec_level=x" to create a meter
which would remark the DSCP precedence to value "x" for all packets that exceed
10000kbps
(I see that you were using mod command instead of add)
However, I see that the current dpctl code does not have any code using the
"prec_level" yet. (You may need to modify the same).
To associate this meter to a flow, you would need to use "meter:2" in the
actions (assuming your meter ID is 2)
All flows that would match the flow would use this meter and that would mean
that the packets if exceeding the rate would have their DSCP precedence level
changed by the value mentioned while configuring the meter.
Regards,
Pradeep.V
From:
openflow-discuss-boun...@lists.stanford.edu<mailto:openflow-discuss-boun...@lists.stanford.edu>
[mailto:openflow-discuss-boun...@lists.stanford.edu<mailto:openflow-discuss-boun...@lists.stanford.edu>]
On Behalf Of Purnima Mohan
Sent: Thursday, May 23, 2013 4:09 PM
To: openflow-discuss
Subject: [openflow-discuss] Openflow1.3 Metering with band type as DSCP_REMARK
Hi,
Can anyone help me with the dscp marking feature in Openflow1.3. I am using
ofsoftswitch13.
1. For eg. I configure a meter as shown below and attach it to a flow.
dpctl unix:/var/runs2.sock meter-mod cmd=mod,flags=1,meter=2
dscp_remark:rate=10000
SENDING:
meter_mod{cmd="mod", flags="0x1"", meter_id="2"", bands=[{type = dscp_remark,
rate="10000", burst_size="0", prec_level="0"}]}
OK.
2. Now how do I use match field to check if the packets are marked? What does
the dscp_remark feature actually do?
Thanks in advance,
--
Regards,
Purnima
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Regards,
Purnima
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