VPP after reboot cannot ping anything
```
set interfaces ethernet eth0 address '192.168.122.14/24'
set interfaces ethernet eth0 description 'WAN'
set interfaces ethernet eth0 ipv6 address
set interfaces ethernet eth1 address '100.64.0.1/24'
set vpp settings interface eth0 driver 'dpdk'
set vpp settings interface eth1 driver 'dpdk'
set vpp settings unix poll-sleep-usec '222'
```
After saving and rebooting, there are no ARP entries:
```
vyos@r14:~$ ping 192.168.122.1 count 2
PING 192.168.122.1 (192.168.122.1) 56(84) bytes of data.
From 192.168.122.14 icmp_seq=1 Destination Host Unreachable
From 192.168.122.14 icmp_seq=2 Destination Host Unreachable
--- 192.168.122.1 ping statistics ---
2 packets transmitted, 0 received, +2 errors, 100% packet loss, time 1000ms
vyos@r14:~$
vyos@r14:~$
vyos@r14:~$ sudo arp -an
? (192.168.122.1) at <incomplete> on eth0
vyos@r14:~$
vyos@r14# run show conf com | match vpp
set vpp settings interface eth0 driver 'dpdk'
set vpp settings interface eth1 driver 'dpdk'
set vpp settings unix poll-sleep-usec '222'
[edit]
vyos@r14#
```
IP FIB after reboot:
```
192.168.122.0/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:9 buckets:1 uRPF:9 to:[0:0]]
[0] [@0]: dpo-drop ip4
192.168.122.0/24
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:8 buckets:1 uRPF:8 to:[0:0]]
[0] [@4]: ipv4-glean: [src:192.168.122.0/24] eth0: mtu:9000 next:1 flags:[] ffffffffffff52540077fa360806
192.168.122.14/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:11 buckets:1 uRPF:13 to:[7:420]]
[0] [@12]: dpo-receive: 192.168.122.14 on eth0
192.168.122.255/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:10 buckets:1 uRPF:11 to:[0:0]]
[0] [@0]: dpo-drop ip4
```
After deleting VPP we can ping again:
```
vyos@r14# delete vpp
[edit]
vyos@r14# commit
[edit]
vyos@r14# run ping 192.168.122.1 count 2
PING 192.168.122.1 (192.168.122.1) 56(84) bytes of data.
64 bytes from 192.168.122.1: icmp_seq=1 ttl=64 time=0.162 ms
64 bytes from 192.168.122.1: icmp_seq=2 ttl=64 time=0.174 ms
--- 192.168.122.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1033ms
rtt min/avg/max/mdev = 0.162/0.168/0.174/0.006 ms
[edit]
vyos@r14#
```
Load VPP configuration again, without reboot and we have connectivity
```
vyos@r14# load
Loading configuration from 'config.boot'
Load complete. Use 'commit' to make changes effective.
[edit]
vyos@r14#
[edit]
vyos@r14# compare commands
set vpp settings interface eth0 driver 'dpdk'
set vpp settings interface eth1 driver 'dpdk'
set vpp settings unix poll-sleep-usec '222'
[edit]
vyos@r14#
vyos@r14# commit
[edit]
vyos@r14# run ping 192.168.122.1 count 2
PING 192.168.122.1 (192.168.122.1) 56(84) bytes of data.
64 bytes from 192.168.122.1: icmp_seq=1 ttl=64 time=1.33 ms
64 bytes from 192.168.122.1: icmp_seq=2 ttl=64 time=0.761 ms
--- 192.168.122.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 0.761/1.045/1.330/0.284 ms
[edit]
vyos@r14#
```
IP FIB after reapply config (without reboot):
```
192.168.122.0/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:10 buckets:1 uRPF:11 to:[0:0]]
[0] [@0]: dpo-drop ip4
192.168.122.1/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:13 buckets:1 uRPF:29 to:[0:0]]
[0] [@5]: ipv4 via 192.168.122.1 eth0: mtu:1500 next:5 flags:[] 52540016840852540077fa360800
192.168.122.0/24
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:9 buckets:1 uRPF:10 to:[0:0]]
[0] [@4]: ipv4-glean: [src:192.168.122.0/24] eth0: mtu:9000 next:1 flags:[] ffffffffffff52540077fa360806
192.168.122.14/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:12 buckets:1 uRPF:15 to:[23:1905]]
[0] [@12]: dpo-receive: 192.168.122.14 on eth0
192.168.122.255/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:11 buckets:1 uRPF:13 to:[0:0]]
[0] [@0]: dpo-drop ip4
```