Public bug reported:
If for instance you learn a DST route of 172.18.1.1/32 from your BGP
neighbor with a metric of 0, and you add a static route of 172.18.1.1/32
with a metric of 20, the BGP route disappears out of the kernel routing
table. This is normal behavior.
So if you statically add a route of 172.18.1.1/32 with a metric of 20,
another of 172.18.1.1/32 with a metric of 25 and another with a metric
of 35 the BGP route is still missing.
Now when you delete any of the three routes, for instance the one with
the metric of 25. Qaugga's BGP daemon adds the BGP route back into the
routing table, thinking the route was deleted.
Not sure if this is the desired functionality or a bug.
Example:
BGP learned route:
route -n | grep 172.18.1.1
172.18.1.1 10.19.0.1 255.255.255.255 UGH 0 0 0 eth3
Adding static route with metric:
route -n | grep 172.18.1.1
172.18.1.1 10.19.0.1 255.255.255.255 UGH 20 0 0 eth3
Adding more static routes:
route -n | grep 172.18.1.1
172.18.1.1 10.19.0.1 255.255.255.255 UGH 20 0 0 eth3
172.18.1.1 10.19.0.1 255.255.255.255 UGH 25 0 0 eth3
172.18.1.1 10.19.0.1 255.255.255.255 UGH 35 0 0 eth3
Deleting one of the static routes:
172.18.1.1 10.19.0.1 255.255.255.255 UGH 0 0 0 eth3
172.18.1.1 10.19.0.1 255.255.255.255 UGH 25 0 0 eth3
172.18.1.1 10.19.0.1 255.255.255.255 UGH 35 0 0 eth3
** Affects: quagga (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1521621
Title:
Quagga BGP and static routes with metric bug
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