perfsonar development work

[Nina Jeliazkova <>]

Martin Swany написа:
> Hi Fausto,
>
>> I observed in interface schema that exists 2 fields possible to
>> describe address to an interface:
>>
>> - ifAddress
>> - ipAddress
>>
>> May, in my implemetation under cactisonar rrdma, use in ifAddress a
>> MAC address and in ipAddress a IP value? Because I observed that in
>> perfSONAR-UI it uses ifAddress to inform IP value of the interfaces.
>
> The intent of this was that the ifAddress is the same as used
> in the SNMP MIB, i.e. the IP of the interface.  The ipAddress
> is actually the contact address, i.e. the address to do an SNMP
> Get toward.
>
> IMO the layer 2 characteristics should go under the L2
> interface characteristics, but that is only available in
> the revised topology schema.  It's in the SVN, so feel
> free to take a look and make suggestions.
>
PerfsonarUI returns as ifAddress the value reported from the service,
normally I would expect this to be the IP value of an interface and the
monitored device (e.g. router) may have different IP address, reported
in ipAddress.

Note that
-a single interface might have more than one IP addresses, might have
IPv4 and/or IPv6 address
-a monitored interface (e.g. in a switch) might not have an IP address
-sub interfaces (reported as different metadata entries) might have same
IP address and different ifName

This presents some difficulties in interpreting how to define the entity
to be visualized, especially when necessary to combine different metrics
and directions. (Yes, we are back to the standardization talk, this time
from different perspective).

Regards,
Nina


> best,
> martin
>

-- 
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Dr. Nina Nikolova-Jeliazkova
Institute for Parallel Processing
Bulgarian Academy of Sciences
Acad. G. Bonchev St 25-A
1113 Sofia, Bulgaria
Tel: +359 886 802011
ICQ: 10705013
www: http://ambit.acad.bg/nina
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