Hi guys,
I’m using VPP 19.08 with networking-vpp in an openstack stein environment,
where we are busy building an open environment that is specifically built for
NFV applications. One of those functions is a firewall setup, where we firewall
a customer’s traffic and provide said customer with a ‘clean and safe’ internet
connection.
As such, I am evaluating a VPP setup, which looks very promising. However: in
the following scenario, I run into an issue:
I have a compute host on which I have a firewall running ánd a guest (cirros
for now). Setup is as follows:
145.144.1.53-fa:16:3e:7c:96:d0 – VirtualEthernet0/0/2 | firewall instance |
VirtualEthernet0/03 145.144.1.78 - fa:16:3e:26:3e:0e <–> vlan 69 <–>
145.144.1.84 - fa:16:3e:93:0c:50- VirtualEthernet0/0/4 | cirros instance |
From the cirros instance pingin the inside interface of the firewall (0/0/3)
works like a charm, I wouldn’t have expected any different.
When I try to ping the outside interface of the firewall (0/0/2), traces show
the following:
0:53:47:316205: vhost-user-input
VirtualEthernet0/0/4 queue 0
virtio flags:
INDIRECT Indirect descriptor
virtio_net_hdr first_desc_len 12
flags 0x00 gso_type 0
num_buff 0
00:53:47:316208: ethernet-input
frame: flags 0x1, hw-if-index 7, sw-if-index 10
IP4: fa:16:3e:93:0c:50 -> fa:16:3e:26:3e:0e
00:53:47:316209: l2-input
l2-input: sw_if_index 10 dst fa:16:3e:26:3e:0e src fa:16:3e:93:0c:50
00:53:47:316210: l2-input-feat-arc
IN-FEAT-ARC: head 1 feature_bitmap 500525 ethertype 800 sw_if_index 10,
next_index 22
00:53:47:316211: acl-plugin-in-ip4-l2
acl-plugin: lc_index: -1, sw_if_index 10, next index 1, action: 3, match: acl
-1 rule 44 trace_bits 80000000
pkt info 0000000000000000 0000000000000000 0000000000000000 3501909154019091
000a030100000008 0200ffff00000000
lc_index 0 l3 ip4 145.144.1.84 -> 145.144.1.53 l4 lsb_of_sw_if_index 10
proto 1 l4_is_input 1 l4_slow_path 1 l4_flags 0x03 port 8 -> 0 tcp flags
(invalid) 00 rsvd 0
00:53:47:316214: l2-input-feat-arc-end
IN-FEAT-ARC: head 0 feature_bitmap 100525 ethertype 0 sw_if_index -1,
next_index 17
00:53:47:316215: l2-input-acl
INACL: sw_if_index 10, next_index 9, table 41, offset 1392
00:53:47:316216: l2-learn
l2-learn: sw_if_index 10 dst fa:16:3e:26:3e:0e src fa:16:3e:93:0c:50 bd_index
3
00:53:47:316218: l2-fwd
l2-fwd: sw_if_index 10 dst fa:16:3e:26:3e:0e src fa:16:3e:93:0c:50 bd_index
3 result [0x5d50000000009, 9] none
00:53:47:316219: l2-output
l2-output: sw_if_index 9 dst fa:16:3e:26:3e:0e src fa:16:3e:93:0c:50 data 08
00 45 00 00 54 33 9c 40 00 40 01
00:53:47:316220: l2-output-feat-arc
OUT-FEAT-ARC: head 1 feature_bitmap 4001 ethertype 800 sw_if_index 9,
next_index 11
00:53:47:316220: acl-plugin-out-ip4-l2
acl-plugin: lc_index: 6, sw_if_index 9, next index 1, action: 1, match: acl 4
rule 2 trace_bits 00000000
pkt info 0000000000000000 0000000000000000 0000000000000000 3501909154019091
0009020100000008 0200ffff00000006
lc_index 6 l3 ip4 145.144.1.84 -> 145.144.1.53 l4 lsb_of_sw_if_index 9 proto
1 l4_is_input 0 l4_slow_path 1 l4_flags 0x02 port 8 -> 0 tcp flags (invalid) 00
rsvd 0
00:53:47:316223: l2-output-feat-arc-end
OUT-FEAT-ARC: head 0 feature_bitmap 1 ethertype 0 sw_if_index -1, next_index 0
00:53:47:316224: VirtualEthernet0/0/3-output
VirtualEthernet0/0/3 l2_hdr_offset_valid l3_hdr_offset_valid
IP4: fa:16:3e:93:0c:50 -> fa:16:3e:26:3e:0e
ICMP: 145.144.1.84 -> 145.144.1.53
tos 0x00, ttl 64, length 84, checksum 0xe163
fragment id 0x339c, flags DONT_FRAGMENT
ICMP echo_request checksum 0x9914
00:53:47:316225: VirtualEthernet0/0/3-tx
VirtualEthernet0/0/3 queue 0
virtio flags:
SINGLE_DESC Single descriptor packet
virtio_net_hdr first_desc_len 4096
flags 0x00 gso_type 0
num_buff 1
Packet 3
00:53:47:316357: vhost-user-input
VirtualEthernet0/0/3 queue 0
virtio flags:
INDIRECT Indirect descriptor
virtio_net_hdr first_desc_len 12
flags 0x00 gso_type 0
num_buff 0
00:53:47:316358: ethernet-input
frame: flags 0x1, hw-if-index 6, sw-if-index 9
IP4: fa:16:3e:26:3e:0e -> fa:16:3e:93:0c:50
00:53:47:316358: l2-input
l2-input: sw_if_index 9 dst fa:16:3e:93:0c:50 src fa:16:3e:26:3e:0e
00:53:47:316359: l2-input-feat-arc
IN-FEAT-ARC: head 1 feature_bitmap 500525 ethertype 800 sw_if_index 9,
next_index 22
00:53:47:316359: acl-plugin-in-ip4-l2
acl-plugin: lc_index: -1, sw_if_index 9, next index 1, action: 3, match: acl
-1 rule 97 trace_bits 80000000
pkt info 0000000000000000 0000000000000000 0000000000000000 5401909135019091
0009030100000000 0200ffff00000000
lc_index 0 l3 ip4 145.144.1.53 -> 145.144.1.84 l4 lsb_of_sw_if_index 9 proto
1 l4_is_input 1 l4_slow_path 1 l4_flags 0x03 port 0 -> 0 tcp flags (invalid) 00
rsvd 0
00:53:47:316359: l2-input-feat-arc-end
IN-FEAT-ARC: head 0 feature_bitmap 100525 ethertype 0 sw_if_index -1,
next_index 17
00:53:47:316360: l2-input-acl
INACL: sw_if_index 9, next_index 0, table 12, offset -1
00:53:47:316361: error-drop
rx:VirtualEthernet0/0/3
00:53:47:316362: drop
l2-input-acl: input ACL table-miss drops
The packets get dropped.. I have found all the acl’s in vpp, but I cannot
really see what would be wrong here, or what causes the packets to be dropped.
Has anyone else had any experiences like this, or a solution?
Regards,
Eyle
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