Thanks Leslie. I understand it better now.
And yes I was referring to subnets when I used
the term 'segments'.
I recognize the problem now as a configuration
issue on the router and it's IP table.
Thanks again.
Larry
>> -----Original Message-----
>> From: lclark@us.ibm.com [mailto:lclark@us.ibm.com]
>> Sent: Monday, June 12, 2000 8:33 AM
>> To: NV-L@tkg.com
>> Subject: Re: [NV-L] Segment discovery
>>
>>
>>
>>
>> It sounds like you are talking about subnets, as opposed to
>> what Netview
>> calls segments and creates under subnets, right? The
>> networks it draws
>> (or subnets) are based solely on IP address with masks applied. Some
>> customers do not administer subnet masks on certain types of devices,
>> depending on whether their routing protocols require them, and are
>> surprised at the subnet addresses that Netview decides on in those
>> cases. If you select a device on the map and do 'Monitor... Network
>> Configuration... Addresses' (the wording may be different on NT) you
>> will see the addresses and masks of each interface. These are
>> pulled directly from the device via snmp. They come from the IP
>> Address table. Funny ones are useful for finding configuration errors
>> on the devices. If they are wrong, you can either correct the config
>> on the device and delete and rediscover it, or you can force it to be
>> loaded where you want it with the loadhost command, a messy
>> administrative task but sometimes the only solution.
>>
>> What Netview calls Segments (Segment1, Segment2, etc) under each
>> subnet are just groupings based on the interface type as returned by
>> the device via snmp, eg TokenRing, FDDI, Ethernet, Other, etc.
>>
>> Hope this helps. If not, ask with more words......
>>
>> Cordially,
>>
>> Leslie A. Clark
>> IBM Global Services - Systems Mgmt & Networking
>> Detroit
>> ---------------------- Forwarded by Leslie Clark/Southfield/IBM on
>> 06/12/2000 09:24 AM ---------------------------
>>
>>
>>
>> "Chance, Larry" <lchance@sfbcic.com>@tkg.com on 06/09/2000
>> 10:40:38 AM
>>
>>
>> Please respond to IBM NetView Discussion <nv-l@tkg.com>
>>
>> Sent by: owner-nv-l@tkg.com
>>
>>
>> To: "'NetviewListSERVERUsers nv-l@tkg.com'" <nv-l@tkg.com>
>> cc:
>>
>> Subject: [NV-L] Segment discovery
>>
>>
>>
>>
>> How does Netview determine the Network SEGMENTs when it
>> does an autodiscovery of the routers throughout the network?
>>
>> I have users at a remote site that question the SEGMENT numbers
>> on their map, which was assigned by Netview.
>>
>> It looks to me that Netview reads the route table entries
>> after gathering
>> the router's interfaces and masks and calculates the SEGMENT number.
>> I would think those entries come from the 'routing'
>> protocols used and
>> configured on the router, along with the 'network' number
>> for the 'routing'
>> protocol, such as IGRP. More or less, Is it the configuration of the
>> router
>> that causes the SEGMENT number. Am I even close?
>>
>> Thanks,
>> Larry
>>
>>
>>
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