Hi Ewan,
It should never be invalid. These sorts of checks in the data-plane only serve
to reduce performance.
You should examine the VLIB nodes prior to the ipv6 lookup (multicast or
unicast) to determine which one is setting the FIB index incorrectly.
Regards,
neale
From: "yug...@telincn.com" <yug...@telincn.com>
Date: Monday, 6 November 2017 at 04:55
To: "Neale Ranns (nranns)" <nra...@cisco.com>, vpp-dev <vpp-dev@lists.fd.io>
Subject: Re: Re: [vpp-dev] IPV6 Forwarding error
Hi neale,
I add this protection, but other errors come out in many different ways, all
are ipv6 fib process errors.
fib_node_index_t
ip6_mfib_table_lookup2 (const ip6_mfib_t *mfib,
const ip6_address_t *src,
const ip6_address_t *grp)
{
ip6_mfib_node_t *i6mn;
ip6_mfib_key_t key;
if(!mfib)
return 0; (or return ~0;)
IP6_MFIB_MK_KEY(grp, src, &key);
i6mn = (ip6_mfib_node_t*) rn_match(key.key,
(struct radix_node_head *)mfib->rhead);
// const cast
ASSERT(NULL != i6mn);
return (i6mn->i6mn_entry);
}
Regards,
Ewan
________________________________
yug...@telincn.com
From: yug...@telincn.com<mailto:yug...@telincn.com>
Date: 2017-11-06 09:17
To: Neale Ranns (nranns)<mailto:nra...@cisco.com>;
vpp-dev<mailto:vpp-dev@lists.fd.io>
Subject: Re: Re: [vpp-dev] IPV6 Forwarding error
Hi neale,
I've added a protection on it, but should it be invalid somehow?
Regards,
Ewan
________________________________
yug...@telincn.com
From: Neale Ranns (nranns)<mailto:nra...@cisco.com>
Date: 2017-11-04 23:01
To: yug...@telincn.com<mailto:yug...@telincn.com>;
vpp-dev<mailto:vpp-dev@lists.fd.io>
Subject: Re: [vpp-dev] IPV6 Forwarding error
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
________________________________
e...@telincn.com
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