[vpp-dev] VPP node graph visualization

[Luke, Chris]

All,

I finally got around[1] to bashing together something to dump the graph as a 
.dot. It's a Python script that uses the papi module. It's not ready to merge 
yet IMO but I've made the patch public[2] in case anyone else wants to play 
with it while I work on it. The commit message has my current TODO list for the 
patch, and an example invocation to produce an SVG of the graph using Graphiz.

Enjoy,
Chris.

[1] To be precise, I did this already over a year ago 
https://lists.fd.io/pipermail/vpp-dev/2016-May/001201.html  but that was a CLI 
command inside VPP. I wanted to build something that used the API instead since 
I feel we can do more sophisticated things there.
[2] https://gerrit.fd.io/r/#/c/9222/
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Re: [vpp-dev] [SFC] Query regarding SFC classifier configuration for ip4 traffic

[Phaneendra Manda]

Hi Hongjun,

Firstly i would like to thank you for your support. This link was a great
help and i was able to get the configuration for classifier and i can see
the packets coming to nsh-classifier node in the packet trace.

I need some more support on the below items:

1. It would be a great if you can share me the configuration in VPP through
CLI for SFF and proxy.

2. Is there any performance statistics that SFC feature can support like
capacity, throughput etc..

Currently i was stuck at the below problem.
3. Now i can get the packet at *nsh-classifier* node. But it fails to
lookup in the ip4-table.

Below is my configuration for vxlan-gpe:
vpp# sh vxlan-gpe
[0] local: 192.168.20.1 remote: 192.168.20.2   vxlan VNI 100 next-protocol
nsh fibs: (encap 0, decap 0)

Ping to SF ip address is success
vpp# ping 192.168.20.2 source GigabitEthernet0/10/0
64 bytes from 192.168.20.2: icmp_seq=1 ttl=64 time=.3264 ms
64 bytes from 192.168.20.2: icmp_seq=2 ttl=64 time=.1723 ms


Below is the packet trace:
vpp# show trace
--- Start of thread 0 vpp_main ---
Packet 1

00:35:34:038659: dpdk-input
  GigabitEthernet0/9/0 rx queue 0
  buffer 0x4cf2: current data 0, length 124, free-list 0, clone-count 0,
totlen-nifb 0, trace 0x0
  PKT MBUF: port 0, nb_segs 1, pkt_len 124
buf_len 2176, data_len 124, ol_flags 0x0, data_off 128, phys_addr
0x7e033cc0
packet_type 0x0
  IP4: 08:00:27:aa:bb:21 -> 08:00:27:aa:bb:01
  UDP: 192.168.0.10 -> 192.0.0.1
tos 0x00, ttl 255, length 110, checksum 0x4923
fragment id 0xf1a7
  UDP: 1024 -> 1024
length 90, checksum 0x
00:35:34:038709: ethernet-input
  IP4: 08:00:27:aa:bb:21 -> 08:00:27:aa:bb:01
00:35:34:038717: l2-input
  l2-input: sw_if_index 1 dst 08:00:27:aa:bb:01 src 08:00:27:aa:bb:21
00:35:34:038720: l2-input-classify
  l2-classify: sw_if_index 1, table 0, offset c0, next 17
00:35:34:038722: nsh-classifier

  nsh ver 0 ttl 3 len 6 (24 bytes) md_type 1 next_protocol 1
  service path 185 service index 255
  c1 1 c2 2 c3 3 c4 4

00:35:34:038731: vxlan-gpe-encap
  VXLAN-GPE-ENCAP: tunnel 2
00:35:34:038734: ip4-lookup
  fib 0 dpo-idx 0 flow hash: 0x
  IP6_HOP_BY_HOP_OPTIONS: 0.0.0.2 -> 0.0.0.3
version 0, header length 0
tos 0xc6, ttl 0, length 257, checksum 0x0001 (should be 0x)
fragment id 0x006c offset 53240, flags MORE_FRAGMENTSDONT_FRAGMENT
00:35:34:038737: ip4-drop
IP6_HOP_BY_HOP_OPTIONS: 0.0.0.2 -> 0.0.0.3
  version 0, header length 0
  tos 0xc6, ttl 0, length 257, checksum 0x0001 (should be 0x)
  fragment id 0x006c offset 53240, flags MORE_FRAGMENTSDONT_FRAGMENT
00:35:34:038738: error-drop
  ip4-input: ip4 adjacency drop


-- 
Thanks & regards,
Phaneendra Manda.


On Thu, Nov 2, 2017 at 5:02 PM, Ni, Hongjun  wrote:

> Hi Phaneendra,
>
>
>
> Please refer to below link to see how to configure it and packet trace:
>
> https://wiki.fd.io/view/File:NSH-Classifier-Output.png
>
>
>
> -Hongjun
>
>
>
> *From:* Phaneendra Manda [mailto:mphaneen...@gmail.com]
> *Sent:* Wednesday, November 1, 2017 4:39 PM
> *To:* Ni, Hongjun 
> *Cc:* vpp-dev@lists.fd.io; nsh_sfc-...@lists.fd.io
> *Subject:* Re: [vpp-dev] [SFC] Query regarding SFC classifier
> configuration for ip4 traffic
>
>
>
> Hi Hongjun,
>
>
>
> Thank your very much for your support.
>
>
>
> I have tried this configuration for UDP packets and below is my
> configuration
>
>
>
> classify table mask l3 ip4 proto
>
> classify session l2-input-hit-next input-node nsh-classifier table-index 0
> match l3 ip4 proto 17 opaque-index 47615
>
> set int l2 bridge GigabitEthernet0/9/0 1 1
>
> set interface l2 input classify intfc GigabitEthernet0/9/0 ip4-table 0
>
>
>
> When i send a UDP packet, the packet reaches till "*l2-input-classify*"
> and goes to "*l2-learn*" node. How can i direct the packet to "
> *nsh-classifier*" node?
>
>
>
> Trace output below :
>
>
>
> *00:49:42:211037: dpdk-input*
>
> *  GigabitEthernet0/9/0 rx queue 0*
>
> *  buffer 0x4d8e: current data 0, length 132, free-list 0, clone-count 0,
> totlen-nifb 0, trace 0x1*
>
> *  PKT MBUF: port 0, nb_segs 1, pkt_len 132*
>
> *buf_len 2176, data_len 132, ol_flags 0x0, data_off 128, phys_addr
> 0x74d32280*
>
> *packet_type 0x0*
>
> *  IP4: 08:00:27:aa:bb:21 -> 08:00:27:aa:bb:01 802.1ad vlan 100 802.1ad
> vlan 20*
>
> *  UDP: 192.168.0.10 -> 192.0.0.1*
>
> *tos 0x00, ttl 255, length 110, checksum 0x4923*
>
> *fragment id 0xf1a7*
>
> *  UDP: 1024 -> 1024*
>
> *length 90, checksum 0x*
>
> *00:49:42:211084: ethernet-input*
>
> *  IP4: 08:00:27:aa:bb:21 -> 08:00:27:aa:bb:01 802.1ad vlan 100 802.1ad
> vlan 20*
>
> *00:49:42:211093: l2-input*
>
> *  l2-input: sw_if_index 1 dst 08:00:27:aa:bb:01 src 08:00:27:aa:bb:21*
>
> *00:49:42:211096: l2-input-classify*
>
> *  l2-classify: sw_if_index 1, table -1, offset 0, next 12*
>
> *00:49:42:211099: l2-learn*
>
> *  l2-learn: sw_if_index 1 dst 08:00:27:aa:bb:01 src 08:00:27:aa:bb:21
> bd_index 

Re: [vpp-dev] IPV6 Forwarding error

[Neale Ranns (nranns)]

Hi Ewan,

I would guess that fib_index0 is invalid.

/neale

From:  on behalf of "yug...@telincn.com" 

Date: Saturday, 4 November 2017 at 11:11
To: vpp-dev 
Subject: [vpp-dev] IPV6 Forwarding error

Hi all,
Here is ipv6 forwarding error, my version is 17.04.
Any idea?



Thread 1 "vpp_main" received signal SIGSEGV, Segmentation fault.
mfib_forward_lookup (is_v4=0, frame=0x7fffb8626f00, node=0x7fffb5cffe80, 
vm=0x779aa2a0 )
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vnet/mfib/mfib_forward.c:305
305 mfei0 = ip6_mfib_table_lookup2(ip6_mfib_get(fib_index0),
(gdb) bt
#0  mfib_forward_lookup (is_v4=0, frame=0x7fffb8626f00, node=0x7fffb5cffe80, 
vm=0x779aa2a0 )
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vnet/mfib/mfib_forward.c:305
#1  ip6_mfib_forward_lookup (frame=0x7fffb8626f00, node=0x7fffb5cffe80, 
vm=0x779aa2a0 )
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vnet/mfib/mfib_forward.c:353
#2  ip6_mfib_forward_lookup_avx2 (vm=0x779aa2a0 , 
node=0x7fffb5cffe80, frame=0x7fffb8626f00)
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vnet/mfib/mfib_forward.c:369
#3  0x77757129 in dispatch_node (vm=0x779aa2a0 , 
node=0x7fffb5cffe80, type=,
dispatch_state=VLIB_NODE_STATE_POLLING, frame=, 
last_time_stamp=10161712619298)
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:998
#4  0x7775741d in dispatch_pending_node (vm=vm@entry=0x779aa2a0 
, p=0x7fffb8556de8,
last_time_stamp=) at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1144
#5  0x77757e7d in vlib_main_or_worker_loop (is_main=1, 
vm=0x779aa2a0 )
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1591
#6  vlib_main_loop (vm=0x779aa2a0 ) at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1611
#7  vlib_main (vm=vm@entry=0x779aa2a0 , 
input=input@entry=0x7fffb4cd4fa0)
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1739
#8  0x77790f23 in thread0 (arg=140737347494560) at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/unix/main.c:507
#9  0x75a3dce0 in clib_calljmp () at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vppinfra/longjmp.S:110
#10 0x7fffd410 in ?? ()
#11 0x7779193d in vlib_unix_main (argc=, argv=)
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/unix/main.c:606

Regards,
Ewan

e...@telincn.com
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[vpp-dev] IPV6 Forwarding error

[yug...@telincn.com]

Hi all,
Here is ipv6 forwarding error, my version is 17.04.
Any idea?


Thread 1 "vpp_main" received signal SIGSEGV, Segmentation fault.
mfib_forward_lookup (is_v4=0, frame=0x7fffb8626f00, node=0x7fffb5cffe80, 
vm=0x779aa2a0 )
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vnet/mfib/mfib_forward.c:305
305 mfei0 = ip6_mfib_table_lookup2(ip6_mfib_get(fib_index0),
(gdb) bt
#0  mfib_forward_lookup (is_v4=0, frame=0x7fffb8626f00, node=0x7fffb5cffe80, 
vm=0x779aa2a0 )
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vnet/mfib/mfib_forward.c:305
#1  ip6_mfib_forward_lookup (frame=0x7fffb8626f00, node=0x7fffb5cffe80, 
vm=0x779aa2a0 )
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vnet/mfib/mfib_forward.c:353
#2  ip6_mfib_forward_lookup_avx2 (vm=0x779aa2a0 , 
node=0x7fffb5cffe80, frame=0x7fffb8626f00)
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vnet/mfib/mfib_forward.c:369
#3  0x77757129 in dispatch_node (vm=0x779aa2a0 , 
node=0x7fffb5cffe80, type=, 
dispatch_state=VLIB_NODE_STATE_POLLING, frame=, 
last_time_stamp=10161712619298)
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:998
#4  0x7775741d in dispatch_pending_node (vm=vm@entry=0x779aa2a0 
, p=0x7fffb8556de8, 
last_time_stamp=) at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1144
#5  0x77757e7d in vlib_main_or_worker_loop (is_main=1, 
vm=0x779aa2a0 )
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1591
#6  vlib_main_loop (vm=0x779aa2a0 ) at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1611
#7  vlib_main (vm=vm@entry=0x779aa2a0 , 
input=input@entry=0x7fffb4cd4fa0)
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1739
#8  0x77790f23 in thread0 (arg=140737347494560) at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/unix/main.c:507
#9  0x75a3dce0 in clib_calljmp () at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vppinfra/longjmp.S:110
#10 0x7fffd410 in ?? ()
#11 0x7779193d in vlib_unix_main (argc=, argv=)
at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/unix/main.c:606

Regards,
Ewan


e...@telincn.com
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