need advice having 2 default route on one server
tkim
total of 3 NIC on the server. 2 for HACMP and 1 for replication of
informix data and backup. two nic cards (hacmp) are on one network
10.10.10.X and 1 nic on a sperate network 192.0.0.x
here is the problem - can you have 2 default gateway for the two
networks? i know it can be done but what are the problems? adviseable
or not? will there be problems routing?
Hubert Quarantel-Colombani
Hi,
Hum hum... The "default router" concept applies to the entire IP stack.
Thou dost not have a "default router" per IP interface.
There is one, and only one, single and unique default router per IP
stack AT A GIVEN TIME.
The terms "default router" strictly stand for "the router to send the IP
packets through when no other entry in the routing table matches the
destination IP address".
So, if there were two default router defintions at the same moment, how
would the IP stack choose the one to send the packet through ?
If a priority system were used, then these router definitions would not
be "default" any more, because if the hierarchy created between them...
If a round robin system were used, then there would be a single default
router at a given time t, even if this defintion only last for t+dt...
Hubert.
Note: IPv4 and IPv6 are two different IP stacks, so thou canst have an
IPv4 default router and an IPv6 default router.
El Toro
AIX, as well as most other popular commercial Unices, have provided
facilities for multiple default gateways as a means of failover (while
others allow multiple ones that get used in round-robin fashion).
Check the IBM website, or http://www.rootvg.net, and search for this
feature to see how it is accomplished in AIX. I don't think it was
added to AIX until 5.x, but check AIX 4.3.3 to be sure.
But, in answer to at least your first question, multiple default
gateways is a feature of AIX.