Hi, How do you think about the following flows for example?
priority=0, ip, nw_src=0.0.0.0/1.1.1.0, actions=blahblah priority=0, ip, nw_src=0.0.1.0/1.1.1.0, actions=blahblah priority=0, ip, nw_src=0.1.0.0/1.1.1.0, actions=blahblah priority=0, ip, nw_src=0.1.1.0/1.1.1.0, actions=blahblah where "nw_src" is the matcher for the source IP address. You can specify the actions according to matched source IP address. Set netmask as 1.1.1.0 to treat IP address in more binary-oriented way :) Let me know when your experiment goes well! On Tue, Aug 6, 2013 at 4:03 AM, Ritesh Rekhi <rre...@paloaltonetworks.com>wrote: > Hi Diego,**** > > ** ** > > Thanks for the reply once again.**** > > ** ** > > You are right 8 entries are not enough. My explaination was just to > explain you my design.I can have 255 buckets also which will be more better. > **** > > ** ** > > I have a follow up on the way you told me to implement .Is it possible to > match last 8 bits on source-ip by giving mask like 0.0.0.1 or 0.0.0.2 or > 0.0.0.3.**** > > ** ** > > In all the OVS manuals you can only do a match to ignore last bits i.e > 192.168.1.1 255.255.255.0**** > > ** ** > > Sorry I am new to OVS .That’s why these questions.**** > > ** ** > > My idea is that if webserver gets overwhelmed it can send an event to > controller to take it out and when load is less it can add itself.**** > > ** ** > > Ritesh**** > > ** ** > > *From:* Diego Rivero [mailto:river...@gmail.com] > *Sent:* Monday, August 05, 2013 11:10 AM > > *To:* Ritesh Rekhi > *Cc:* discuss@openvswitch.org > *Subject:* Re: [ovs-discuss] Simple IP load Balancing**** > > ** ** > > Hi,**** > > ** ** > > I don't know if there is any method to implement hash function as you > need. Because as far as I know the OpenFlow rules are stateless. In case > you want to achieve such functionality with only source IP address, set IP > address mask to extract 3 bits so that you can pick up the number from 0 to > 7 which depends on the source IP address. I have never tried this so you > need to test it. Besides that why do you want to do load-balancing with > only source IP address? For me it seems that the load of each web server > gets unbalanced easily. Moreover I cannot see big advantages to set only 8 > flow entries.**** > > ** ** > > Diego**** > > ** ** > > On Mon, Aug 5, 2013 at 11:46 PM, Ritesh Rekhi <rre...@paloaltonetworks.com> > wrote:**** > > Hi Diego,**** > > **** > > Thanks for replying.Let me explain more on my design.**** > > **** > > Let’s say you have 8 servers to which you load balance with ip’s 2.2.2.1 > to 2.2.2.8 and they all are web servers. Now client 1 which is IP > 45.45.45.45 comes i.e tcp syn we has the source-ip and come up with a > number 1-(through hash to bucket function) and then changes dest ip to one > of the servers and send packet out to that port, we also add the flow table > entry where it is matching hash of source-ip and change dest-ip based on > the hash.**** > > **** > > The reason I want to do hash to bucket function is that I don’t know which > source-ip’s can come and I want same source-ip to go to same server > always.With hash to bucket approach there are 2 advantages I only need 8 > entries for all the source-ip’s in this world and secondly I don’t have to > send all the packets to controller to make a decision.**** > > **** > > With your approach I need to add flow table entries for each source-ip and > that will be too much.**** > > **** > > Thx**** > > Ritesh**** > > **** > > **** > > *From:* Diego Rivero [mailto:river...@gmail.com] > *Sent:* Monday, August 05, 2013 5:44 AM > *To:* Ritesh Rekhi > *Cc:* discuss@openvswitch.org > *Subject:* Re: [ovs-discuss] Simple IP load Balancing**** > > **** > > Hi,**** > > **** > > I don't fully understand your design but it might be better to keep the > list of the IP address and the MAC address of the bucket somewhere in an > OpenFlow controller. When packet_in for the first time, go through the list > and decide which bucket to send the packet to. > > Diego,**** > > > Sent from my iPhone**** > > > On 4-ago-2013, at 10:32, Ritesh Rekhi <rre...@paloaltonetworks.com> wrote: > **** > > Hi all,**** > > **** > > I want to make a simple Load balancer where I want to change the > destination IP for the request and for response change the source-ip.**** > > **** > > I can do that easily if I know the source-ip’s but I want to do it by > hasing source-ip to a bucket and then based on bucket change dest-ip for > the request .That way all packets with same source-ip can go to 1 given > dest-ip.**** > > **** > > Do we have any function where we can hash a field and assign it to a > bucket?**** > > **** > > Are there any plans to implement any hash to bucket algo? **** > > **** > > Thx in advance**** > > Ritesh**** > > **** > > **** > > _______________________________________________ > discuss mailing list > discuss@openvswitch.org > http://openvswitch.org/mailman/listinfo/discuss**** > > ** ** >
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