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Distributed NNM
Examples of xnmtopoconf commands
These are the DIM control com m and s:
To ad d :
To d elete:
To check status:
To test:
xnmtopoconf
xnmtopoconf
xnmtopoconf
xnmtopoconf
-add collection_station
-delete collection_station
-print
-test collection_station
Remove secondary objects from the database
When d isabling DIM, second ary objects can be rem oved from the
d atabase u sing the follow ing com m and in ru nning N N M V7.51 w ith
Interm ed iate Patch 18 or greater:
ovtopofix –C -X
D IM set-up in a nutshell
On the collection station:
Ed it / etc/ snm pd .conf to establish set com m unity string
Ed it filters file to set up topology filter
Ed it ovtopm d .lrf to ad d filter using LRF process (page 5), for exam ple:
OVs_YES_START:pmd,ovwdb:O -f Routers:
OVs_WELL_BEHAVED:15:
On the m anagem ent station:
Run: xnmtopoconf -print to see if CS is know n.
If not, ad d using: xnmtopoconf -add -unmanage <CS>
Options - Configure SN MP to set the SN MP set string for CS
Test collection station : xnmtopoconf -test <CS>
Configure failover: xnmtopoconf -failover <CS>
Set status check interval: xnmtopoconf -interval [n] <CS>
Manage CS: xnmtopoconf -manage <CS>
Run: ovtopodump –RISC on the MS to monitor progress
Migrating to non-D IM w ith APA
Becau se of su bstantial im p rovem ents to scalability betw een version 6
and 7.5 on N N M, it m ay be d esirable to m igrate from m u ltip le N N M
collection stations back to a single server architectu re. The ad vantages
for d oing this are: few er N N M licenses, a single top ology to m aintain,
better analysis across p olling bou nd aries by the APA, and be tter
d ynam ic m ap s. Disad vantages are: a loss of failover ability if u sing
DIM for failover, m ore com p lex and sensitive p erform ance tu ning
tasks and non-d istribu ted p olling. N ote that if netmon-based p olling is
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