There is no redirecting as all the hosts have the same IP (typically on the loopback interface). Traffic goes back directly. You can even do priority but I would not. You get host down detection as the route will be withdrawn. You do not get server overload. On the other hand I am not sure I want such feature. I would use it to load balance the load balancers / web cache / ssl proxy and it should be quite good for that purpose. Regards Baldur Den 09/04/2015 21.48 skrev "Barry Shein" <bzs@world.std.com>:
On April 9, 2015 at 20:50 baldur.norddahl@gmail.com (Baldur Norddahl) wrote:
You can do this for free with equal cost multi path routing. You announce the same IP from multiple servers with eg. OSPF.
True, and thanks, but that's just the beginning of an implementation, you still need all the gunk that detects and reacts to down or overloaded hosts, whether you want to do MAC or IP level redirecting, how data travels back to the remote host (directly or via the box's IP, NAT-like?), priority management, firewall functions, statistics gathering, blame apportionment (if I build it myself who do I get to blame?), etc.
-b
Den 09/04/2015 19.34 skrev "Barry Shein" <bzs@world.std.com>:
On April 9, 2015 at 09:11 raphael.timothy@gmail.com (Tim Raphael)
wrote:
VyOS is a community fork of Vyatta and is still being developed very actively and it pushing ahead with many new features! It's pretty stable too imo.
SPEAKING of OSS routers...
Does anyone know of a single OSS project which supports the usual BGP etc kind of things (routing) AND virtual hosting, the terminology is muddled, but one IP in, chooses among one or more IPs for load-balancing (not to be confused with device load-balancing), fail-over, round-robin, other policies? The typical web farm kind of thing, but for other kinds of services also like mail, imap, etc.
I know one can piece together more than one project but then one has to get them to play together and learn their quirks and so forth. For example I don't think any Mikrotik (ok not strictly OSS but they seem nice) supports the virtual host stuff unless I'm missing it.
I have some very old Alteons that do the virtual host stuff well enough but they are very long in the tooth (no IPv6, BGP is so old it's useless to the point of scary, etc.)
P.S. No particular need for fancy WAN interfaces, ethernet presentations are fine.
-- -Barry Shein
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