Comment 17 for bug 1894843

Verified on focal-proposed and fix is working fine as per the testcase

Ping to floating ip failed when router is disabled and succeed a few milliseconds after the router is enabled.

$ ping 10.5.151.34
PING 10.5.151.34 (10.5.151.34) 56(84) bytes of data.
64 bytes from 10.5.151.34: icmp_seq=1 ttl=62 time=3.19 ms
64 bytes from 10.5.151.34: icmp_seq=2 ttl=62 time=0.990 ms
64 bytes from 10.5.151.34: icmp_seq=3 ttl=62 time=1.18 ms
64 bytes from 10.5.151.34: icmp_seq=4 ttl=62 time=0.893 ms
64 bytes from 10.5.151.34: icmp_seq=5 ttl=62 time=0.876 ms
64 bytes from 10.5.151.34: icmp_seq=6 ttl=62 time=0.890 ms
64 bytes from 10.5.151.34: icmp_seq=7 ttl=62 time=0.804 ms
64 bytes from 10.5.151.34: icmp_seq=8 ttl=62 time=0.705 ms
64 bytes from 10.5.151.34: icmp_seq=9 ttl=62 time=0.877 ms
From 10.5.151.236 icmp_seq=11 Redirect Host(New nexthop: 34.151.5.10)
From 10.5.151.236 icmp_seq=12 Redirect Host(New nexthop: 34.151.5.10)
From 10.5.151.236 icmp_seq=13 Redirect Host(New nexthop: 34.151.5.10)
From 10.5.151.236 icmp_seq=11 Destination Host Unreachable
From 10.5.151.236 icmp_seq=15 Redirect Host(New nexthop: 34.151.5.10)
From 10.5.151.236 icmp_seq=16 Redirect Host(New nexthop: 34.151.5.10)
From 10.5.151.236 icmp_seq=14 Destination Host Unreachable
From 10.5.151.236 icmp_seq=18 Redirect Host(New nexthop: 34.151.5.10)
From 10.5.151.236 icmp_seq=20 Redirect Host(New nexthop: 34.151.5.10)
From 10.5.151.236 icmp_seq=23 Redirect Host(New nexthop: 34.151.5.10)
From 10.5.151.236 icmp_seq=21 Destination Host Unreachable
From 10.5.151.236 icmp_seq=24 Destination Host Unreachable
From 10.5.151.236 icmp_seq=25 Destination Host Unreachable
From 10.5.151.236 icmp_seq=26 Destination Host Unreachable
From 10.5.151.236 icmp_seq=28 Destination Host Unreachable
From 10.5.151.236 icmp_seq=29 Destination Host Unreachable
From 10.5.151.236 icmp_seq=30 Destination Host Unreachable
64 bytes from 10.5.151.34: icmp_seq=31 ttl=62 time=1.02 ms
64 bytes from 10.5.151.34: icmp_seq=32 ttl=62 time=0.821 ms
64 bytes from 10.5.151.34: icmp_seq=33 ttl=62 time=0.738 ms
64 bytes from 10.5.151.34: icmp_seq=34 ttl=62 time=0.670 ms