I have seen one case where pings at the commandline, or test... ping worked but
netmon
continually timed out, and when a sniffer was put on the segment with the
management station
we could see that the return pings were actually being lost, rather frequently.
They were
investigating the interface card and drivers; but in the meantime, it appeared
that
increasing the retries was more effective than increasing the timeout, since a
dropped
echo would never come back, but maybe the next one would. My gut feeling is that
increased timeout is most helpful for snmp queries, and increased retries is
most helpful
for status polling. I don't claim to understand this, but that is how I treat
it.
Cordially,
Leslie Clark
IBM Global Services - Network & Systems Management - Detroit
----------------------------------------------------------------------------------------------------------------------------------------
James:
The timeout is set at 3.5 seconds for the routers. The routers are FDDI
attached to the
same Gigaswitch. I am going to shutdown the old interface & see what happens.
Thanks you for the recommendation. I will let you all know the results.
Gil
>>> <James_Shanks AT TIVOLI DOT COM> 09/18/98 12:26pm >>>
You said pings and demand polls work fine, but if netmon is turning your
interfaces red, it is because its pings are timing out. I suggest you run
xnmsnmpconf and look at the default timeouts for these interfaces and see
about raising the timeout a bit.
James Shanks
Tivoli (NetView for UNIX) L3 Support
Gil Irizarry <IRIZARRG AT LABS.WYETH DOT COM> on 09/18/98 10:56:32 AM
Please respond to Discussion of IBM NetView and POLYCENTER Manager on
NetView et alia <NV-L AT UCSBVM.UCSB DOT EDU>
To: NV-L AT UCSBVM.UCSB DOT EDU
cc: (bcc: James Shanks)
Subject: Change Of NV6K IP ADDR
Hi All:
I have a RISC6K F50 with FDDI, Fast Ethernet & 10 meg Ethernet. I have
changed the
default gateway from the 10 meg to the FDDI nic. The FDDI connects to a
gigaswitch
concentrator that also houses the router with the IP address I am using as
default.
Now, NETMON is detecting "interface down" alerts frequently on all my
routers
interfaces. Shortly after, I see the "interface up" alert and all my router
icon turn green
again.
I did run reset_ci after my change. Is there another utility needed?
netstat -nr shows:
"default xxx.xxx.xxx.xx UG 23 767159 fi0 -
-" Where xxx is the IP
address I have specified as the default gateway. Pings & demand poll work
fine.
The last entry on the display shows:
"www.www.ww yyy.yyy.yyy.yyy.yyy U 159 771354 fi0 - -"
Where www is the
subnet and yyy is the IP address of my Netview box.
Running:
NV4.1.2 PTF LVL U453385
AIX 4.2.1.4
Thanks in advance
Gil Irizarry
280 King of Prussia Road
ST. Davids, PA 19087
Phone: (610) 902-3426
INTERNET: IRIZARRG AT LABS.WYETH DOT COM
|
