zebra: update kernel routes with interface check #17668
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Zebra NH check is wrong -- it does not update missing interface routes Steps to reproduce: ``` ip link set dev eth0 up ip -4 addr add 192.168.0.2/24 dev eth0 ip -4 route add default via 192.168.0.1 ip -4 addr flush dev eth0 ``` Before ``` K>* 0.0.0.0/0 [0/0] via 192.168.0.1, eth0, 00:00:07 ``` After Route is removed from zebra Signed-off-by: Yaroslav Kholod <[email protected]>
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These changes were done before me in here -- https://github.com/FRRouting/frr/pull/17544/files |
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These changes were done before me in here -- https://github.com/FRRouting/frr/pull/17544/files |
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#13561
Kernel routes are not always properly updated in zebra. When an IP address is flushed from an interface route is still present in zebra.
Steps to reproduce:
ip link set dev eth0 upip -4 addr add 192.168.0.2/24 dev eth0ip -4 route add default via 192.168.0.1ip -4 addr flush dev eth0Current fix adds extra validation before setting NH Active.