Interface address poin to point rto

vyos@vyos# set interfaces ethernet eth7 vif 538 address 103.163.36.19/31
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vyos@vyos# commit

WARNING: could not change “eth7” flow control setting!

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vyos@vyos# set interface ethernet eth7 disable-flow-control
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vyos@vyos# commit
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vyos@vyos# set interfaces ethernet eth7 vif 538 address 103.163.36.19/31

Configuration path: [interfaces ethernet eth7 vif 538 address 103.163.36.19/31] already exists

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vyos@vyos# set protocols static route 0.0.0.0/0 next-hop 103.163.36.18
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vyos@vyos# commit
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vyos@vyos# ping 103.163.36.18
PING 103.163.36.18 (103.163.36.18) 56(84) bytes of data.
From 103.163.36.19 icmp_seq=1 Destination Host Unreachable
From 103.163.36.19 icmp_seq=2 Destination Host Unreachable
From 103.163.36.19 icmp_seq=3 Destination Host Unreachable
From 103.163.36.19 icmp_seq=4 Destination Host Unreachable
From 103.163.36.19 icmp_seq=5 Destination Host Unreachable
From 103.163.36.19 icmp_seq=6 Destination Host Unreachable
^C
— 103.163.36.18 ping statistics —
8 packets transmitted, 0 received, +6 errors, 100% packet loss, time 7194ms
pipe 4
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vyos@vyos#

please anyone can help me ?