IBM Support

MA46277 - LIC-COMM-OTHER-INCORROUT INCORRECT ARP RESPONSE FROM IBM I

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 APAR (Authorized Program Analysis Report)

Abstract

LIC-COMM-OTHER-INCORROUT INCORRECT ARP RESPONSE FROM IBM I

Error Description

IBM i is host system. This host is hosting for a Linux          
partition, and it is configured using associated local          
interface, using virtual ethernet.                              
He is able to connect to the Linux system with virtual          
ethernet, but periodically, the IBM i responds to ARP requests  
for 192.168.1.254, which is their router.                      

Problem Summary

IBM i is host system. This host is hosting for a Linux          
partition, and it is configured using associated local          
interface, using virtual ethernet.                              
He is able to connect to the Linux system with virtual ethernet,
but periodically, the IBM i responds to ARP requests for        
192.168.1.254, which is their router.                          

Problem Conclusion

Addresses within a range determined by the interface's          
class-based broadcast address and the proxied interface's subnet
mask may be treated as a local address by ARP processing and    
responses sent for ARP requests to the non-broadcast addresses.
For example, a proxy subnet interface of 192.168.1.213 with mask
255.255.255.252 may result in responses sent for the range      
determined by 192.168.1.255 (class C broadcast) mask            
255.255.255.252 (i.e. 192.168.1.252 to 192.168.1.254).          

Temporary Fix

Comments

Circumvention


Before starting the virtual Ethernet interface that is to be    

proxied, wait until the status of the proxy agent interface    
(i.e. either the specified associated local interface or        
preferred interface) is Active.                                

PTFs Available

R730 MF63460 PTF Cover Letter   7283

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... No
Component.................................. 9400DG3TC
Failing Module.......................... RCHMGR
Reported Release................... R730
Duplicate Of..............................




System i Support

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Document Information

Modified date:
28 October 2017