RE: Virtual IP for Failover Questions

[CWilt@xxxxxxxxxxxx]

Chris,

Thanks for the info.  But I'm wondering how this works; how are the clients
on both subnets configured? Are there any clients on the 10.99.99.x subnet
with the iSeries?

Thanks,
Charles

> -----Original Message-----
> From: Chris Bipes [mailto:chris.bipes@xxxxxxxxxxxxxxx]
> Sent: Monday, January 26, 2004 2:32 PM
> To: 'Midrange Systems Technical Discussion'
> Subject: RE: Virtual IP for Failover Questions
> 
> 
> I am running a Virtual IP on my iSeries at 5.1 and it is not 
> in the same
> subnet as the physical adapters.
> 
> example: 10.99.99.1  = Virtual IP
>          10.1.1.1    = Physical IP #1
>          192.168.1.1 = Physical IP #2
> 
> Dft router for each subnet as a route like this:
> 10.99.99.1 255.255.255.255 10.1.1.1 metric 1 for the 10.1.1.0 /
> 255.255.255.0 subnet ( local interface)
> 10.99.99.1 255.255.255.255 10.1.1.254 metric 3 - router to 192.168.0.0
> subnet (remote subnet)
> 
> 10.99.99.1 255.255.255.255 192.168.1.1 metric 1 for the 192.168.1.0 /
> 255.255.0.0 subnet (local interface)
> 10.99.99.1 255.255.255.255 192.168.254.254 metric 3 - router 
> to 10.1.1.0
> subnet (remote subnet)
> 
> 
> As you see both default routers also have a route to the 
> other subnets so if
> the primary is down, they go thru the router that ties the two subnets
> together
> 
> -----Original Message-----
> From: CWilt@xxxxxxxxxxxx
> 
> All,
> 
> I've successfully setup Virtual IP as describe in the Infocenter here:
> http://publib.boulder.ibm.com/iseries/v5r2/ic2924/index.htm?in
fo/rzajw/rzajw
lbvip.htm

Basically, a single Virtual IP on the same subnet as my two Ethernet
adapters.

However, I'm wondering if the following is possible:
1) Multiple Virtual IP address
2) Virtual IP address that are not on the same subnet as (some/all) the
physical adapters.


I have a feeling that #2 isn't possible.  But I'm thinking #1 may well be
possible.  Before I start playing around with this I was wondering if anyone
had any tried doing this.


In case you're wondering why I need this.  The iSeries clients are connected
via 1 of three a specified IP address and are not using DNS.  So in order
for the clients to start using the virtual IP address without manually
reconfiguring them I need to make all three current IPs virtual and assign
new IPs to the adapters.

The different subnet question is because I don't have 3 new IP address on
the original subnet to assign to the adapters.

FYI: I am not the guy who set up the network!  :-)
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