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Conference turris::digital_unix

Title:DIGITAL UNIX(FORMERLY KNOWN AS DEC OSF/1)
Notice:Welcome to the Digital UNIX Conference
Moderator:SMURF::DENHAM
Created:Thu Mar 16 1995
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:10068
Total number of notes:35879

9009.0. "DE500 ip alias arp" by GIDDAY::SCHWARZ () Sun Mar 02 1997 18:32

    
    
    I have a customer who is having problems with ip aliasing on v4.0b.
    If he sets is DE500 to 10M and issues an 
    
     ifconfig xx alias xxxxnetmask xxxx
    
    he is immediately able to ping the address. When he sets the DE500 to
    100M and issues the ifconfig he is no seeing a
    
    src IP=(service IP for www-main) / dest IP=(service IP for www-main)
    
    and is thus unable to ping the alias.
    
    If he does the above on a v3.2d system he is able to ping the alias
    immediately.
    
    Any suggestions on what could be going on?
    
    Reards
    
    Kym Schwarz
    Unix Support
    CSC Sydney
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9009.1What steps are they using?NETRIX::"[email protected]"Brian HaleyMon Mar 03 1997 15:0215
Hi,

Could you list the exact steps the customer is using to do this (I'm
assuming they aren't using netconfig/netsetup).  You can also ask them
to try setting the alias via /etc/rc.config like the utilities would:

IFCONFIG_X="1.2.3.4 netmask 255.255.255.0 speed 100 alias 1.2.3.5"

and then reboot.

Making sure the interface itself is working properly at 100 Mb would
be a good idea too (hopefully already tried).

-Brian
[Posted by WWW Notes gateway]
9009.2how to reproduceGIDDAY::SCHWARZMon Mar 03 1997 23:0823
    here is what they have to do to reproduce the prolem:
    
    >Without ASE
    >1) setup an ip address and netmask on the interface ( using netsetup )
    >2) ping to this address is fine
    >3) add an alias to the interface
    >       ifconfig tu0 alias xxx netmask xxx
    >4) ping of the alias address fails
    >   arp -a does not show up the alias address
    >5) this situation does not resolve itself
    >
    >With ASE
    >1) set up a service with an IP address
    >2) fail the service over
    >3) ping of alias does not work
    
    They initially noticed with problem because the ip address was not
    failing over using DECsafe. They have tested this on a v3.2d system and
    it works fine.
    
    
    Kym
    
9009.3NETRIX::"[email protected]"Brian HaleyTue Mar 04 1997 17:3514
Hi,

I talked with someone in ASE-land and they mentioned a similar problem when
they updated one member of an ASE to 4.0b (they think).  The person that did
the qual isn't in today, but I'll ask him tomorrow if there is a workaround
for this.

You might want to escalate this, just make sure to include board types/revs
and command output before and after (netstat -i and ifconfig come to mind).

Notes isn't really the place for critical problems...

-Brian
[Posted by WWW Notes gateway]
9009.4Sorry, no luckNETRIX::"[email protected]"Brian HaleyWed Mar 05 1997 11:2810
Sorry,

Noone seemed to remember this exact problem, and the only person that
might know more left the company 2 weeks ago.  I know that there was
failover testing with the de500 and 4.0b and all worked fine.

Hopefully you've already escalated this problem...

-Brian
[Posted by WWW Notes gateway]