[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference smurf::ase

Title:ase
Moderator:SMURF::GROSSO
Created:Thu Jul 29 1993
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2114
Total number of notes:7347

1868.0. "Help with IP aliasing" by NQOS01::16.60.16.16::Paul Gavin () Thu Feb 06 1997 16:38

I have a customer who has set up 3 networks on each node of  his DECsafe 
cluster. ( one FDDI and 2 ethernet). This set up is designed to spread the 
newtork load over 3 different networks. Each user connects to the same alias

   i.e.  Network 1 connects to foo 1.1.1.1
	 Network 2 connects to foo 1.1.2.1
	 Network 1 connects to foo 1.1.3.1

	The customer wants to be able to use the same alias ( foo) when the 
services are switched over to another node.
	I am sure that this is possible but I do not have a cluster to try it. 
 I will be on site this Saturday doing it and I would rather know exactly how 
to do it before going on site. Can anyone help.
	
	
T.RTitleUserPersonal
Name
DateLines
1868.1No, ...BACHUS::DEVOSManu Devos DEC/SI Brussels 856-7539Fri Feb 07 1997 09:298
    Hello Paul,
    
    If you have three networks, you must have three alias names foo1, foo2
    and foo3. It is not possible to associate three different addresses to
    a single alias name.
    
    Regards, Manu
    
1868.2Should be possible...UTROP1::MAAT_RFri Feb 07 1997 14:1319
    If I understand .0 well, the foo definitions are different on each
    network. Tricky! Wouldn't want to be responsible for maintaining them.
    
    If the fail-over node also has three netwerk interfaces, I see no
    reason why they could not be assigned those aliases too in case of a
    failover. This can be tried manually by issuing:
    	ifconfig tu0 (or ln0, or fta0...) alias a.b.c.d
    on the fail-over node, for each interface concerned. The same command
    with -alias will remove them.
    
    If this works it can be incorporated in a user script, along with a
    ping check to find out if the aliases are defined anywhere else on the
    network.
    
    
    But perhaps I did not understand the question in .0 right.
    
    
    				Rob