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authorJR Rivers <jrrivers@cumulusnetworks.com>2012-09-24 17:26:46 +0000
committerDavid Lamparter <equinox@opensourcerouting.org>2012-10-25 10:15:58 -0700
commit8fc9e007ee752a982fe47311702d7ff3b9c5b5cd (patch)
tree8dd5ef95e303d34f1045afe538f44a07dab017d3 /isisd
parentd8a4e42b7d19a87eacc00c825e913907a58f39ee (diff)
ospfd: blackhole route removal for area range
ISSUE When an area range is created in which there the sub-area has routes that are smaller than the range, an ABR creates a blackhole route to cover the range. When the range is removed, the blackhole route is not removed. --A----B----C--- B is an ABR with A in area 1 and C in area 0. If A advertises `10.2.0.0/30` and `10.2.0.4/30` and B is configured with `area 0.0.0.1 range 10.2.0.0/29` a blackhole is created on B (`blackhole 10.2.0.0/29 proto zebra`). When the area/range is removed via the command line, the blackhole remains in existence even though the "range" route is removed from area 0 and the individual routes are propagated. PATCH The reason for this behavior is that, prior to this patch, the range is deleted from the area's list, so when ospf_abr_manage_discard_routes() gets called, there is nothing to clean up. The patch removes the discard route as part of the processing of the command line (ospf_area_range_unset()). Signed-off-by: JR Rivers <jrrivers@cumulusnetworks.com> Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com> Reviewed-by: Shrijeet Mukherjee <shm@cumulusnetworks.com> Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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