The code might as well add the required /32's to the FIB

When DHCP client is set on interface, broadcasts DHCP DISCOVER messages.
When DHCP server sends OFFER, VPP doesn't send REQUEST but drops the packet, until /32's route is configured with "ip route add 255.255.255.255/32 via local"

VPP configuration:
vppctl set interface state GigabitEthernet0/a/0 up
vppctl set dhcp client intfc GigabitEthernet0/a/0

Trace from VPP:
Packet 2

00:00:04:367331: dpdk-input
GigabitEthernet0/a/0 rx queue 0
buffer 0x10ee0: current data 0, length 60, free-list 0, totlen-nifb 0, trace 0x1
PKT MBUF: port 1, nb_segs 1, pkt_len 60
buf_len 2176, data_len 60, ol_flags 0x0,
packet_type 0x0
ARP: 08:00:27:58:71:eb -> ff:ff:ff:ff:ff:ff
request, type ethernet/IP4, address size 6/4
08:00:27:58:71:eb/192.168.20.1 -> 00:00:00:00:00:00/192.168.20.10
00:00:04:367416: ethernet-input
ARP: 08:00:27:58:71:eb -> ff:ff:ff:ff:ff:ff
00:00:04:367420: arp-input
request, type ethernet/IP4, address size 6/4
08:00:27:58:71:eb/192.168.20.1 -> 00:00:00:00:00:00/192.168.20.10
00:00:04:367439: error-drop
arp-input: IP4 destination address not local to subnet

Packet 3

00:00:04:623614: dpdk-input
GigabitEthernet0/a/0 rx queue 0
buffer 0x10eb9: current data 0, length 342, free-list 0, totlen-nifb 0, trace 0x2
PKT MBUF: port 1, nb_segs 1, pkt_len 342
buf_len 2176, data_len 342, ol_flags 0x0,
packet_type 0x0
IP4: 08:00:27:58:71:eb -> ff:ff:ff:ff:ff:ff
UDP: 192.168.20.1 -> 255.255.255.255
tos 0x10, ttl 128, length 328, checksum 0x64ec
fragment id 0x0000
UDP: 67 -> 68
length 308, checksum 0x67c8
00:00:04:623672: ethernet-input
IP4: 08:00:27:58:71:eb -> ff:ff:ff:ff:ff:ff
00:00:04:623679: ip4-input
UDP: 192.168.20.1 -> 255.255.255.255
tos 0x10, ttl 128, length 328, checksum 0x64ec
fragment id 0x0000
UDP: 67 -> 68
length 308, checksum 0x67c8
00:00:04:623695: ip4-miss
fib 0 adj-idx 0 : miss flow hash: 0x00000000
00:00:04:623705: error-drop
ip4-input: ip4 destination lookup miss