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Gratuitous ARP reply does not work on VOSS platforms

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TitleGratuitous ARP reply does not work on VOSS platforms
Symptoms
VSP discarding Gratudius ARP reply(opcode type=2) and do not updating ARP table. Trace level 14 3 | 15 3 shows packet does not hit the CPU but being discarded at port ingress. MAC is learned, but ARP not. 

Tests were made using IP address 172.24.5.30. GARP packet is sent, toward VSP switch, on port 1/10:

User-added image


On the switch, we can see that the ARP table is not updated:


VSP(config)#show ip arp
==========================================================================================
                                  IP Arp - GlobalRouter
==========================================================================================
IP_ADDRESS      MAC_ADDRESS        VLAN  PORT                 TYPE    TTL(10 Sec) TUNNEL            
------------------------------------------------------------------------------------------
172.17.29.28    00:00:00:00:00:01  -     -                    LOCAL   2160       
172.24.5.100    f8:15:47:e4:06:81  2     -                    LOCAL   2160       
172.24.5.255    ff:ff:ff:ff:ff:ff  2     -                    LOCAL   2160



GARP packet is discarded on the interface level, and INDISCARD counter is increased:


VSP(config)#show interfaces gigabitEthernet error 1/10
====================================================================================================
                              Port Ethernet Error
====================================================================================================
PORT  ERROR   ERROR   FRAMES  TOO     LINK    CARRIER CARRIER SQETEST IN     
NUM   ALIGN   FCS     LONG    SHORT   FAILURE SENSE   ERRORS  ERRORS  DISCARD
----------------------------------------------------------------------------------------------------
1/10  0       0       0       0       0       0       0       0       2


 
Environment
  • Virtual Services Platform 4000 Series
  • Virtual Services Platform 7200
  • Virtual Services Platform 8000 Series
  • Software Version 6.1.2.0 
Cause
The issue is due to a software defect.
Resolution

The issue has been fixed in software 7.1.1.0.
Additional notes

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