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OSPF when converging will choose a DR / Backup DR based upon who has already come up. Irrelevant of priority. As such if under system load OSPF comes up first and elects a DR that under normal circumstances not be the elected one due to priority OSPF does not go back through and re-elect to keep the system stable in this case. Tests are experiencing this: unet> r0 show ip ospf neigh Neighbor ID Pri State Up Time Dead Time Address Interface RXmtL RqstL DBsmL 100.1.1.1 99 Full/Backup 4m14s 3.780s 10.0.1.2 r0-s1-eth0:10.0.1.1 0 0 0 100.1.1.2 0 Full/DROther 4m14s 3.848s 10.0.1.3 r0-s1-eth0:10.0.1.1 0 0 0 100.1.1.3 0 Full/DROther 4m14s 3.912s 10.0.1.4 r0-s1-eth0:10.0.1.1 0 0 0 unet> r1 show ip ospf neigh Neighbor ID Pri State Up Time Dead Time Address Interface RXmtL RqstL DBsmL 100.1.1.0 98 Full/DR 4m15s 3.011s 10.0.1.1 r1-s1-eth1:10.0.1.2 0 0 0 100.1.1.2 0 Full/DROther 4m19s 3.124s 10.0.1.3 r1-s1-eth1:10.0.1.2 0 0 0 100.1.1.3 0 Full/DROther 4m19s 3.188s 10.0.1.4 r1-s1-eth1:10.0.1.2 0 0 0 unet> r2 show ip ospf neigh Neighbor ID Pri State Up Time Dead Time Address Interface RXmtL RqstL DBsmL 100.1.1.0 98 Full/DR 4m27s 3.483s 10.0.1.1 r2-s1-eth0:10.0.1.3 0 0 0 100.1.1.1 99 Full/Backup 4m32s 3.527s 10.0.1.2 r2-s1-eth0:10.0.1.3 0 0 0 100.1.1.3 0 2-Way/DROther 4m32s 3.660s 10.0.1.4 r2-s1-eth0:10.0.1.3 0 0 0 unet> r3 show ip ospf neigh Neighbor ID Pri State Up Time Dead Time Address Interface RXmtL RqstL DBsmL 100.1.1.0 98 Full/DR 4m55s 3.786s 10.0.1.1 r3-s1-eth1:10.0.1.4 0 0 0 100.1.1.1 99 Full/Backup 4m55s 3.829s 10.0.1.2 r3-s1-eth1:10.0.1.4 0 0 0 100.1.1.2 0 2-Way/DROther 4m54s 3.897s 10.0.1.3 r3-s1-eth1:10.0.1.4 0 0 0 Modify the test to do a clear to enforce the order we are specifically looking for. Signed-off-by: Donald Sharp <sharpd@nvidia.com> |
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| .. | ||
| ospf_asbr_summary_topo1.json | ||
| ospf_asbr_summary_type7_lsa.json | ||
| ospf_authentication.json | ||
| ospf_chaos.json | ||
| ospf_ecmp_lan.json | ||
| ospf_ecmp.json | ||
| ospf_lan.json | ||
| ospf_nssa.json | ||
| ospf_p2mp.json | ||
| ospf_routemaps.json | ||
| ospf_rte_calc.json | ||
| ospf_single_area.json | ||
| test_ospf_asbr_summary_topo1.py | ||
| test_ospf_asbr_summary_type7_lsa.py | ||
| test_ospf_authentication.py | ||
| test_ospf_chaos.py | ||
| test_ospf_ecmp_lan.py | ||
| test_ospf_ecmp.py | ||
| test_ospf_lan.py | ||
| test_ospf_nssa.py | ||
| test_ospf_p2mp.py | ||
| test_ospf_routemaps.py | ||
| test_ospf_rte_calc.py | ||
| test_ospf_single_area.py | ||