Messages in this thread | | | Subject | Re: [PROBLEM] No ARP answer when two ifaces with same IP exist (2.2.x) | Date | Sun, 29 Aug 1999 17:04:47 +0100 (BST) | From | Alan Cox <> |
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> Alan, patches floating around and including different checks > for IFF_NOARP, IFF_UP, calls to ip_dev_find() etc. are wrong. > They break more things than repair.
Of that Im sure
> I do not understand the problem for now and, hence, cannot react > more constructively.
The ipvs folks are doing IP level load balancing with inverse masquerade -ie
internet | [MASQ] +------+--------+-------+-------+------+ www1 www2 www3 www4 www5 www6
incoming SYN frames create masquerade sessions mapping user->www to user->www1 www2, etc according to load and rules.
In one mode they set things up differently as follows
internet | +-----+-----+-----+-----------+----------+---------+ | | | | | | | MASQ www www www www www www www1 www2 www3 www4 www5 www6
Each host is www and a unique name. The masq host arps for www, then tunnels the packet to a www[1-n] but without rewrite. The reply doesnt touch the masq so is a lot faster.
However they need to stop www1->wwwn arping for their www tunnel address
Alan
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