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Unexpected reset -Thread Name: tArpPktRcv when vxlan is configured

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TitleUnexpected reset -Thread Name: tArpPktRcv when vxlan is configured
Symptoms
  • Unexpected reset -Thread Name: tArpPktRcv
  • The following is seen in the faultlog
Message  54/246  Exception PPC750 Info     08.62.01.0034   03/23/2017 17:59:51

   Exc Vector:   System Reset - Watchdog Timeout exception  (0x00000100) 
   Thread Name:  tArpPktRcv                  
   Exc Addr:   0x02b8ed28 
   Thread Stack: 0x25e1b000..0x25e17000 
   Stack Pointer: 0x25e19940 
   Traceback Stack:
   [ 0]            0x00000000
   [ 1]            0x007b7ebc
   [ 2]            0x007b07b4
   [ 3]            0x007b0bcc
   [ 4]            0x007b0e58
   [ 5]            0x022a7094
   [ 6]            0x022aa058
   [ 7]            0x02296368
   [ 8]            0x01815324
   [ 9]            0xeeeeeeee
GENERAL EXCEPTION INFO: 
srr0 : 0x02b8ed28   srr1 : 0x0000b032   dar  : 0x00000000 
cr   : 0x42000222   xer  : 0x00000000   fpcsr:0x00000000 
dsisr:0x00000000 
GENERAL REGISTER INFO: 
msr  : 0x0000b032   lr   : 0x007b7ebc   ctr  : 0x02b8eba8   
pc   : 0x02b8ed28   cr   : 0x42000222   xer  : 0x20000000 
r[ 0]:0x007b7ebc  r[ 1]:0x25e195f0  r[ 2]:0x037f21d0  r[ 3]:0x00000002   
r[ 4]:0x0ecab0c8  r[ 5]:0x00000000  r[ 6]:0x0edb9160  r[ 7]:0x0edb9140   
r[ 8]:0x20000000  r[ 9]:0x162ad0c0  r[10]:0x018101c5  r[11]:0x00000005   
r[12]:0x22000224  r[13]:0x04450be0  r[14]:0x04570000  r[15]:0x0edb9140   
r[16]:0x00000000  r[17]:0x00000000  r[18]:0x0458bfd4  r[19]:0x0ecab0c8   
r[20]:0x27188064  r[21]:0x00000004  r[22]:0x00000000  r[23]:0x0edbea18   
r[24]:0x0ecab0c8  r[25]:0x0ecab0c8  r[26]:0x00000000  r[27]:0x2263d3c8   
r[28]:0x0edb9160  r[29]:0x00000040  r[30]:0x00000001  r[31]:0x00000000   
   --------------------------------------------------------------------

 
Environment
  • K-Series
  • S-Series
  • Firmware 8.62.01
  • Vxlan
Cause
Receipt of an ARP or Neighbor Solicitation through an L2 tunnel may cause a reset.
Resolution
Upgrade to Firmware Version 8.62.03

Workaround:

This is an issue with the proxy ARP feature implemented for VXLAN. Disabling the special VXLAN proxy ARP feature stops the resets in the lab. 
 
clear tunnel vxlan arp-nd-proxy

type this command on each system with a VXLAN tunnel as a temporary workaround until you can upgrade to 8.62.03
Additional notes

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