Re: Nameserver

["James Shanks" <jshanks@us.ibm.com>]

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NetView will use whatever name resolution system you have set up in your 
environment.  It uses the OS functions, gethostbyname and gethostbyaddr, 
and lets your operating system retrieve the name.  If your topology 
database and netmon trace show the correct name, then you don't have a 
name resolution problem.  But if your topology database doesn't match your 
map then you have an ipmap problem.  He's the guy who should update the 
map when he sees the trap that says the Node is down.  The only thing you 
can do to force a re-evaluation by him in 5.1 is to stop the GUI and 
restart it.  In 6.0 and 7.1 you can force the update traps to be resent 
using an option on  nmdemandpoll from the command line.  You could just 
try nmdemandpoll on your node now of course, whether from the command line 
or from the GUI, and see if that helps, but I doubt it, if topology has 
already been changed. 

Despite the fact that 5.1.3 on Digital Unix has not got a lot of life 
left, it is still in support at this time and you should feel free to call 
Support and open a problem about this behavior.

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and NT
Tivoli Software / IBM Software Group
 





Robin James <robin.james@thalesatm.com>
Sent by: owner-nv-l@tkg.com
11/01/2001 10:03 AM
Please respond to IBM NetView Discussion

 
        To:     NetView Discussion <nv-l@tkg.com>
        cc: 
        Subject:        [NV-L] Nameserver

 

We halted a node and its symbol stayed green on the IP Internet submap
instead of turning red.

The Topology Database (ovtopodump) showed the correct state, that is the
node was down.

The trapd log showed no Node Down/Marginal events.

Tracing the netmon process (/usr/OV/bin/netmon -M 63) showed that netmon
correctly detected when the node was halted. However the submap was
never updated.

In the Netview Diagnosis Guide it describes the role of the domain
nameserver (DNS) in map synchronisation. As it happens the DNS process
was not running on our Netview computer. Is this the reason why the
symbol did not turn red?

Does Netview require DNS to be available or will it be able to work with
some other means of mapping the IP address, for example /etc/hosts ?

FYI we're using a dead-end Netview setup - NV 5.1.3 on TRU64 UNIX 5.0F 
:-)

TIA
-- 
Robin
email: robin.james@thalesatm.com
tel:   +44 (0) 1633-862020
fax:   +44 (0) 1633-868313
_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l



NetView will use whatever name resolution system you have set up in your environment.  It uses the OS functions, gethostbyname and gethostbyaddr, and lets your operating system retrieve the name.  If your topology database and netmon trace show the correct name, then you don't have a name resolution problem.  But if your topology database doesn't match your map then you have an ipmap problem.  He's the guy who should update the map when he sees the trap that says the Node is down.  The only thing you can do to force a re-evaluation by him in 5.1 is to stop the GUI and restart it.  In 6.0 and 7.1 you can force the update traps to be resent using an option on  nmdemandpoll from the command line.  You could just try nmdemandpoll on your node now of course, whether from the command line or from the GUI, and see if that helps, but I doubt it, if topology has already been changed.  

Despite the fact that 5.1.3 on Digital Unix has not got a lot of life left, it is still in support at this time and you should feel free to call Support and open a problem about this behavior.

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and NT
Tivoli Software / IBM Software Group

Robin James <robin.james@thalesatm.com> Sent by: owner-nv-l@tkg.com 11/01/2001 10:03 AM Please respond to IBM NetView Discussion

To:        NetView Discussion <nv-l@tkg.com>         cc:                 Subject:        [NV-L] Nameserver

We halted a node and its symbol stayed green on the IP Internet submap
instead of turning red.

The Topology Database (ovtopodump) showed the correct state, that is the
node was down.

The trapd log showed no Node Down/Marginal events.

Tracing the netmon process (/usr/OV/bin/netmon -M 63) showed that netmon
correctly detected when the node was halted. However the submap was
never updated.

In the Netview Diagnosis Guide it describes the role of the domain
nameserver (DNS) in map synchronisation. As it happens the DNS process
was not running on our Netview computer. Is this the reason why the
symbol did not turn red?

Does Netview require DNS to be available or will it be able to work with
some other means of mapping the IP address, for example /etc/hosts ?

FYI we're using a dead-end Netview setup - NV 5.1.3 on TRU64 UNIX 5.0F 
:-)

TIA
-- 
Robin
email: robin.james@thalesatm.com
tel:   +44 (0) 1633-862020
fax:   +44 (0) 1633-868313
_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l