Configuring ip4 classifier adds table entry to fib for interface. Vpp then fails to reply to incoming ARP.
It used to work with old version. Not sure whether its bug or I need to configure something differently.

DBGvpp# classify table mask l3 ip4 src
DBGvpp# sh classify tables
TableIdx Sessions NextTbl NextNode
0 0 -1 -1
Heap: 1 objects, 64 of 2k used, 48 free, 0 reclaimed, 1k overhead, 2044k capacity
nbuckets 2, skip 1 match 1
mask 00000000000000000000ffffffff0000
DBGvpp# classify session hit-next node li-hit-ip4 table-index 0 match l3 ip4 src 192.168.1.14
DBGvpp# sh classify tables
TableIdx Sessions NextTbl NextNode
0 1 -1 -1
Heap: 3 objects, 176 of 2k used, 72 free, 0 reclaimed, 1k overhead, 2044k capacity
nbuckets 2, skip 1 match 1
mask 00000000000000000000ffffffff0000
DBGvpp# set ip classify intfc GigabitEthernet0/10/0 table-index 0
DBGvpp# set interface ip address GigabitEthernet0/10/0 192.168.1.13/24
DBGvpp# set interface state GigabitEthernet0/10/0 up
DBGvpp# set interface ip address GigabitEthernet0/11/0 192.168.2.13/24
DBGvpp# set interface state GigabitEthernet0/11/0 up
DBGvpp# show interface address
GigabitEthernet0/10/0 (up):
192.168.1.13/24
GigabitEthernet0/11/0 (up):
192.168.2.13/24
GigabitEthernet0/9/0 (dn):
GigabitEthernet0/a/0 (dn):
local0 (dn):
DBGvpp# sh ip fib
ipv4-VRF:0, fib_index 0, flow hash: src dst sport dport proto
0.0.0.0/0
unicast-ip4-chain
[@0]: dpo-load-balance: [index:0 buckets:1 locks:1 to:[0:0]]
[0] [@0]: dpo-drop
0.0.0.0/32
unicast-ip4-chain
[@0]: dpo-load-balance: [index:1 buckets:1 locks:1 to:[0:0]]
[0] [@0]: dpo-drop
192.168.1.0/24
unicast-ip4-chain
[@0]: dpo-load-balance: [index:12 buckets:1 locks:1 to:[0:0]]
[0] [@4]: glean: GigabitEthernet0/10/0
192.168.1.13/32
unicast-ip4-chain
[@0]: dpo-load-balance: [index:13 buckets:1 locks:1 to:[0:0]]
[0] [@11]: classify:[0]:table:0
192.168.2.0/24
unicast-ip4-chain
[@0]: dpo-load-balance: [index:14 buckets:1 locks:1 to:[0:0]]
[0] [@4]: glean: GigabitEthernet0/11/0
192.168.2.13/32
unicast-ip4-chain
[@0]: dpo-load-balance: [index:15 buckets:1 locks:1 to:[0:0]]
[0] [@2]: dpo-receive: 192.168.2.13 on GigabitEthernet0/11/0
224.0.0.0/8
unicast-ip4-chain
[@0]: dpo-load-balance: [index:3 buckets:1 locks:1 to:[0:0]]
[0] [@0]: dpo-drop
240.0.0.0/8
unicast-ip4-chain
[@0]: dpo-load-balance: [index:2 buckets:1 locks:1 to:[0:0]]
[0] [@0]: dpo-drop
255.255.255.255/32
unicast-ip4-chain
[@0]: dpo-load-balance: [index:4 buckets:1 locks:1 to:[0:0]]
[0] [@0]: dpo-drop
DBGvpp# trace add dpdk-input 1000
DBGvpp# sh trace
------------------- Start of thread 0 vpp_main -------------------
No packets in trace buffer

ping 192.168.1.13 (from other device with local ip 192.168.1.14)

Packet 1/3

00:00:14:141068: dpdk-input
GigabitEthernet0/10/0 rx queue 0
buffer 0x4e03: current data 0, length 60, free-list 0, totlen-nifb 0, trace 0x0
PKT MBUF: port 2, nb_segs 1, pkt_len 60
buf_len 2176, data_len 60, ol_flags 0x0, data_off 128, phys_addr 0x10e38100
packet_type 0x0
ARP: 08:00:27:f9:c7:19 -> ff:ff:ff:ff:ff:ff
request, type ethernet/IP4, address size 6/4
08:00:27:f9:c7:19/192.168.1.14 -> 00:00:00:00:00:00/192.168.1.13
00:00:14:141132: ethernet-input
ARP: 08:00:27:f9:c7:19 -> ff:ff:ff:ff:ff:ff
00:00:14:141169: arp-input
request, type ethernet/IP4, address size 6/4
08:00:27:f9:c7:19/192.168.1.14 -> 00:00:00:00:00:00/192.168.1.13
00:00:14:141391:* error-drop
arp-input: IP4 destination address not local to subnet*

code in vnet/vnet/Ethernet/arp.c:916

fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
if (~0 == fib_index0)

{ error0 = ETHERNET_ARP_ERROR_interface_no_table; goto drop2; }

dst_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
&arp0->ip4_over_ethernet[1].ip4,
32);
dst_flags = fib_entry_get_flags (dst_fei);

conn_sw_if_index0 = fib_entry_get_resolving_interface (dst_fei);

clib_warning(">> ip %U, flags: %x, fib_node_idx %u (%U), out-if %u",
format_ip4_address, &arp0->ip4_over_ethernet[1].ip4,
dst_flags,
dst_fei, format_fib_entry, dst_fei, FIB_ENTRY_FORMAT_DETAIL,
conn_sw_if_index0);

if (!(FIB_ENTRY_FLAG_CONNECTED & dst_flags))

{ *error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local*; goto drop1; }

Dumps this:

Sep 30 08:34:34 dut1 vnet[24925]: arp_input:934: >> ip 192.168.1.13, flags: 0, fib_node_idx 12 (192.168.1.13/32 fib:0 index:12 locks:3#012 src:classify refs:1 #012 index:12
locks:2 proto:ipv4 index:12 pl-index:12 ipv4 weight=1 exclusive: oper-flags:resolved,#012 [@0]: classify:[0]:table:0#012#012 src:interface cover:-1 refs:1 flags:co
nnected,local,#012 index:13 locks:1 proto:ipv4 index:13 pl-index:13 ipv4 weight=1 attached-nexthop: oper-flags:resolved,#012 192.168.1.13 GigabitEthernet0/10/0#01
2 [@0]: arp-ipv4: via 192.168.1.13 GigabitEthernet0/10/0#012#012 forwarding: unicast-ip4-chain#012 [@0]: dpo-load-balance: [index:13 buckets:1 locks:1 to:[0:0]]#012
[0] [@11]: classify:[0]:table:0#012), out-if 4294967295