Hongjun, Thinking it through a bit, there are *many* different approaches to load balancers. I would suggest if you want to support a different one, then starting a new plugin for it may be a good move :)
Ed On Mon, Apr 24, 2017 at 8:04 PM, Ni, Hongjun <hongjun...@intel.com> wrote: > Hi Ed, > > > > Thanks for your prompt response. > > > > This item is required to handle legacy AS, because some legacy AS does not > want to change their underlay forwarding infrastructure. > > > > Besides, some AS IPs are private and invisible outside the AS cluster > domain, and not allowed to expose to external network. > > > > Thanks, > > Hongjun > > > > *From:* Ed Warnicke [mailto:hagb...@gmail.com] > *Sent:* Tuesday, April 25, 2017 10:44 AM > *To:* Ni, Hongjun <hongjun...@intel.com> > *Cc:* vpp-dev@lists.fd.io; Li, Johnson <johnson...@intel.com> > *Subject:* Re: [vpp-dev] Requirement on Load Balancer plugin for VPP > > > > Hongjun, > > > > I can see this point of view, but it radically reduces the scalability of > the whole system. > > Wouldn't it just make sense to run vpp or some other mechanism to decap > the GRE on whatever is running the other AS and feed whatever we are > > load balancing to? Forcing back traffic through the central load balancer > radically reduces scalability (which is why > > Maglev, which inspired what we are doing here, doesn't do it that way > either). > > > > Ed > > > > On Mon, Apr 24, 2017 at 7:18 PM, Ni, Hongjun <hongjun...@intel.com> wrote: > > Hey, > > > > Currently, traffic received for a given VIP (or VIP prefix) is tunneled > using GRE towards > > the different ASs in a way that (tries to) ensure that a given session > will > > always be tunneled to the same AS. > > > > But in real environment, many Application Servers do not support GRE > feature. > > So we raise a requirement for LB in VPP: > > (1). When received traffic for a VIP, the LB need to do load balance, then > do DNAT to change traffic’s destination IP from VIP to AS’s IP. > > (2). When returned traffic from AS, the LB will do SNAT first to change > traffic’s source IP from AS’s IP to VIP, then go through load balance > sessions, and then sent to clients. > > > > Any comments about this requirement are welcome. > > > > Thanks a lot, > > Hongjun > > > > > _______________________________________________ > vpp-dev mailing list > vpp-dev@lists.fd.io > https://lists.fd.io/mailman/listinfo/vpp-dev > > >
_______________________________________________ vpp-dev mailing list vpp-dev@lists.fd.io https://lists.fd.io/mailman/listinfo/vpp-dev
