> Do you *really* want your DNS TTL set down in the same range as
> the time for a BGP route fall-over?Ever read RFC1123?
It states:
2.3 Applications on Multihomed hostsWhen the remote host is multihomed, the name-to-address
translation will return a list of alternative IP addresses. As
specified in Section 6.1.3.4, this list should be in order of
decreasing preference. Application protocol implementations
SHOULD be prepared to try multiple addresses from the list until
success is obtained. More specific requirements for SMTP are
given in Section 5.3.4.When the local host is multihomed, a UDP-based request/response
application SHOULD send the response with an IP source address
that is the same as the specific destination address of the UDP
request datagram. The "specific destination address" is defined
in the "IP Addressing" section of the companion RFC [INTRO:1].Similarly, a server application that opens multiple TCP
connections to the same client SHOULD use the same local IP
address for all.Unfortunately, many programs have chosen not to do this.
Well, yes.
But I thought the thread was talking about multi-homed _networks_,
which I take to be a different problem from multi-homed _hosts_.
Am I in over my head again?