Hello, We are seeing some very strange thing on IPVS tunnel mode(we are running centos 7 with kernel 3.10.0):
Occasionally, the tcpdump shows that IPVS changes tunnelled outer source IP address to a loopback address, like 127.146.255.255, and the tunnelled packets had been dropped . However, most of time, the outer source IP address is the normal IP address bind to the physical ethernet interface. When this happened, we dumped the routing tables and iptables, and it looks this issue is not due to either routing setting or a iptables' SNAT. Since this issue happened on two hosts, we also doubt that this is a hardware problem. We also briefly checked the ip_vs_tunnel_xmit() call and it looks it retrieves outer header information from kernel's routing part. We are wondering whether this is a desired behaviour of IPVS, due to IPVS doesn't want to send out packets at that time? Thanks, Yunzhao _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org Send requests to lvs-users-requ...@linuxvirtualserver.org or go to http://lists.graemef.net/mailman/listinfo/lvs-users
