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Hello Yonghua Peng,
AS per LVS-NAT concept the realservers are allmost at an second network(
rfc1912 ipaddresses allmost ):
haveing i.e net 1.2.3.4 on lb1 at eth0
haveing i.e net 192.168.1.1 on lb1 at eth1
external VIP i.e : 1.2.3.3
haveing i.e net 1.2.3.5 on lb1 at eth1
haveing i.e net 192.168.1.2 on lb2 at eth1
and the VI_GATEWAY on eth1 with i.e : 192.168.1.3
VI_GATEWAY are managed by ldirectord or keepalived or other HA IPVS app.
VI_GATEWAY with keepalived managed by vrrp
keealive docu : http://www.keepalived.org/LVS-NAT-Keepalived-HOWTO.html
Make shure implement nonlocalbinds sys-ctl on realservers.
make shure implement ip forward and nonlocalbinds on LB´s
AS per LVS-DR concept the realservers can be in the same or different networks
and not require any NAT
LVS DR uses the standard default gw allmost with rarp
see http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.LVS-DR.html
--
Mit freundlichen Grüßen / Best Regards
Horst Venzke ; PGP NET : 1024G/082F2E6D ; http://www.remsnet.de
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> Gesendet: Montag, 02. Februar 2015 um 11:42 Uhr
> Von: "Yonghua Peng" <yhpeng@xxxxxxxxx>
> An: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
> Betreff: Re: [lvs-users] about NAT return path
>
> Hi,
>
> So, since LVS (NAT mode) implement SNAT for the returned packages, and
> all LVS hosts have the same VIP, and all LVS hosts have been configured
> with the same rules, now for the realserver, it can pickup any one of
> the LVS hosts as its default gw. Am I right?
>
> Regards.
>
>
> Martin Wheldon wrote:
> > The SNAT could be configured on either the LVS node or the real server.
> >
> > Best Regards
>
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