Hi Ewan,

I would guess that fib_index0 is invalid.

/neale

From: <vpp-dev-boun...@lists.fd.io> on behalf of "yug...@telincn.com" 
<yug...@telincn.com>
Date: Saturday, 4 November 2017 at 11:11
To: vpp-dev <vpp-dev@lists.fd.io>
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=0x7ffff79aa2a0 <vlib_global_main>)
    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=0x7ffff79aa2a0 <vlib_global_main>)
    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=0x7ffff79aa2a0 <vlib_global_main>)
    at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vnet/mfib/mfib_forward.c:353
#2  ip6_mfib_forward_lookup_avx2 (vm=0x7ffff79aa2a0 <vlib_global_main>, 
node=0x7fffb5cffe80, frame=0x7fffb8626f00)
    at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vnet/mfib/mfib_forward.c:369
#3  0x00007ffff7757129 in dispatch_node (vm=0x7ffff79aa2a0 <vlib_global_main>, 
node=0x7fffb5cffe80, type=<optimized out>,
    dispatch_state=VLIB_NODE_STATE_POLLING, frame=<optimized out>, 
last_time_stamp=10161712619298)
    at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:998
#4  0x00007ffff775741d in dispatch_pending_node (vm=vm@entry=0x7ffff79aa2a0 
<vlib_global_main>, p=0x7fffb8556de8,
    last_time_stamp=<optimized out>) at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1144
#5  0x00007ffff7757e7d in vlib_main_or_worker_loop (is_main=1, 
vm=0x7ffff79aa2a0 <vlib_global_main>)
    at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1591
#6  vlib_main_loop (vm=0x7ffff79aa2a0 <vlib_global_main>) at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1611
#7  vlib_main (vm=vm@entry=0x7ffff79aa2a0 <vlib_global_main>, 
input=input@entry=0x7fffb4cd4fa0)
    at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/main.c:1739
#8  0x00007ffff7790f23 in thread0 (arg=140737347494560) at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/unix/main.c:507
#9  0x00007ffff5a3dce0 in clib_calljmp () at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vppinfra/longjmp.S:110
#10 0x00007fffffffd410 in ?? ()
#11 0x00007ffff779193d in vlib_unix_main (argc=<optimized out>, argv=<optimized 
out>)
    at 
/home/wangzy/Desktop/VBRASV100R001/vpp1704/build-data/../src/vlib/unix/main.c:606

Regards,
Ewan
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e...@telincn.com
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