Hi,
Using VPP v1804 I created IP-in-IP tunnel and ran into IP4-not-enabled
issue. Following is the trace
===============================
------------------ Start of thread 1 vpp_wk_0 -------------------
Packet 1
00:04:16:407330: dpdk-input
VirtualFunctionEthernet1/0/1 rx queue 0
buffer 0x291b: current data 14, length 48, free-list 0, clone-count
0, totlen-nifb 0, trace 0x0
ext-hdr-valid
l4-cksum-computed l4-cksum-correct l2-hdr-offset 0
l3-hdr-offset 14
PKT MBUF: port 0, nb_segs 1, pkt_len 62
buf_len 2176, data_len 62, ol_flags 0x0, data_off 128, phys_addr
0x80148e80
packet_type 0x0 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
IP4: 90:e2:ba:91:22:04 -> 00:0f:b7:11:8d:da
IP_IN_IP: 50.0.0.1 -> 60.0.0.1
tos 0x00, ttl 64, length 48, checksum 0x0cc8
fragment id 0x0001
00:04:16:407343: ip4-input
IP_IN_IP: 50.0.0.1 -> 60.0.0.1
tos 0x00, ttl 64, length 48, checksum 0x0cc8
fragment id 0x0001
00:04:16:407350: ip4-lookup
fib 0 dpo-idx 7 flow hash: 0x00000000
IP_IN_IP: 50.0.0.1 -> 60.0.0.1
tos 0x00, ttl 64, length 48, checksum 0x0cc8
fragment id 0x0001
00:04:16:407354: ip4-local
IP_IN_IP: 50.0.0.1 -> 60.0.0.1
tos 0x00, ttl 64, length 48, checksum 0x0cc8
fragment id 0x0001
00:04:16:407356: ipip4-input
IPIP: tunnel 3 len 48 src 50.0.0.1 dst 60.0.0.1
00:04:16:407358: ip4-input
UDP: 20.0.0.3 -> 30.0.0.2
tos 0x00, ttl 64, length 28, checksum 0x48cc
fragment id 0x0001
UDP: 53 -> 53
length 8, checksum 0xcd6f
00:04:16:407359: ip4-not-enabled
UDP: 20.0.0.3 -> 30.0.0.2
tos 0x00, ttl 64, length 28, checksum 0x48cc
fragment id 0x0001
UDP: 53 -> 53
length 8, checksum 0xcd6f
00:04:16:407365: error-drop
===============================
However we are able to fix above issue by following patch:
diff --git a/src/vnet/ipip/ipip.c b/src/vnet/ipip/ipip.c
index 82c961c..d3bf9d9 100644
--- a/src/vnet/ipip/ipip.c
+++ b/src/vnet/ipip/ipip.c
@@ -468,6 +468,8 @@ ipip_add_tunnel (ipip_transport_t transport,
t->fib_index = fib_index;
t->sw_if_index = sw_if_index;
+ ip4_sw_interface_enable_disable (sw_if_index, 1);
+
t->transport = transport;
vec_validate_init_empty (gm->tunnel_index_by_sw_if_index,
sw_if_index, ~0);
gm->tunnel_index_by_sw_if_index[sw_if_index] = t_idx;
@@ -529,6 +531,7 @@ ipip_del_tunnel (u32 sw_if_index)
if (t == NULL)
return VNET_API_ERROR_NO_SUCH_ENTRY;
+ ip4_sw_interface_enable_disable (sw_if_index, 0);
vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
vnet_delete_hw_interface (vnm, t->hw_if_index);
Are we missing anything? Any comments will be appreciated.
Thanks,
Nitin
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