In preparing for a possible carp redundacy setup for a client's border router/firewall I have found no information so far as to whether it is possible to have carp working where the link to the ISP is a /30.
Every example I have found in presentations and tutorials has used 3 IPs on a typical dual firewall setup. So they assume (all fictional addresses here) something like 4.3.2.1 is the upstream router, with .2 for the $ext_if in unit 1, .3 for $ext_if in unit 2 and .4 for the carp0 in each. With a common enough point-to-point /30 link where upstream is .1 and the firewall is .2, what can we use in hostname.xx0 in each of the firewalls? No more IPs are available from the ISP apart from a routed subnet that is expecting to arrive via .2. References to the documentation that did not surface in my searches would be appreciated. Thanks, Rod/ (PS It is going to get worse: There will be two IPv4 links and a combined IPv4/IPv6 link.) *** NOTE *** Please DO NOT CC me. I <am> subscribed to the list. Mail to the sender address that does not originate at the list server is tarpitted. The reply-to: address is provided for those who feel compelled to reply off list. Thankyou. Rod/ /earth: write failed, file system is full cp: /earth/creatures: No space left on device
