heh, on our Mimix machines we have remote journalling all going through a
separate route. Very typical.

Line Type Text
LANLINMX *ELAN Mimix: GB Ethernet line
LANLINSYS *ELAN Lan line connecting GDISYS to others
CMN03 & CMN14

Internet Subnet Line Line
Address Mask Description Type
10.17.6.128 255.255.254.0 LANLINSYS *ELAN
10.17.6.129 255.255.254.0 LANLINSYS *ELAN
10.17.6.130 255.255.254.0 LANLINSYS *ELAN
10.17.6.131 255.255.254.0 LANLINSYS *ELAN
10.17.252.191 255.255.254.0 LANLINMX *ELAN

Route Subnet Next Preferred
Destination Mask Hop Interface
*DFTROUTE *NONE 10.17.6.1 *NONE
10.10.252.0 255.255.254.0 10.17.252.1 10.17.252.191

When you consider in a failover you want to drop the 'normal' IP addresses
in order to fail over the users to the backup machine but you want to
leave remote journalling going for catch up and be ready to do the switch
back.

And if you have two machines, PRIMARY and BACKUP and your users only know
them by the name PRODUCTION, but your client access sessions for high
level systems people like you go to PRIMARY and BACKUP instead of
PRODUCTION can you see how your sessions might work? You're going into
the backdoor for replication.

Rob Berendt

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