Solaris Common Messages and Troubleshooting Guide

Technical Notes

A broadcast over ATM LAN Emulation is emulated by the broadcast and the unknown server (BUS) for the emulated LAN. If the Sun command transmits its ARP request, some switch implementations for LANE repeat the ARP request over the bus_forward channel, so that it can be seen on the local interface, again:


----- ATM AAL5 Header -----
Packet 1 arrived at 12:12:30.42
Packet size=66 bytes
TRANSMIT : VC=75
LANE Data Frame  Type=0x0806 (ARP)
ARP:  ----- ARP/RARP Frame -----
ARP:  
ARP:  Hardware type = 1
ARP:  Protocol type = 0800 (IP)
ARP:  Length of hardware address = 6 bytes
ARP:  Length of protocol address = 4 bytes
ARP:  Opcode 1 (ARP Request)
ARP:  Sender's hardware address = 8:0:20:82:8f:91
ARP:  Sender's protocol address = 192.168.31.54, lab054-lane0
ARP:  Target hardware address = ?
ARP:  Target protocol address = 192.168.31.50, lab050-lane0
ARP:  

----- ATM AAL5 Header -----
Packet 2 arrived at 12:12:30.42
Packet size=66 bytes
RECEIVE : VC=76
LANE Data Frame  Type=0x0806 (ARP)
ARP:  ----- ARP/RARP Frame -----
ARP:  
ARP:  Hardware type = 1
ARP:  Protocol type = 0800 (IP)
ARP:  Length of hardware address = 6 bytes
ARP:  Length of protocol address = 4 bytes
ARP:  Opcode 1 (ARP Request)
ARP:  Sender's hardware address = 8:0:20:82:8f:91
ARP:  Sender's protocol address = 192.168.31.54, lab054-lane0
ARP:  Target hardware address = ?
ARP:  Target protocol address = 192.168.31.50, lab050-lane0
ARP:  
Now the request is answered:

----- ATM AAL5 Header -----
Packet 3 arrived at 12:12:30.42
Packet size=66 bytes
RECEIVE : VC=84
LANE Data Frame  Type=0x0806 (ARP)
ARP:  ----- ARP/RARP Frame -----
ARP:  
ARP:  Hardware type = 1
ARP:  Protocol type = 0800 (IP)
ARP:  Length of hardware address = 6 bytes
ARP:  Length of protocol address = 4 bytes
ARP:  Opcode 2 (ARP Reply)
ARP:  Sender's hardware address = 8:0:20:8c:4e:f0
ARP:  Sender's protocol address = 192.168.31.50, lab050-lane0
ARP:  Target hardware address = 8:0:20:82:8f:91
ARP:  Target protocol address = 192.168.31.54, lab054-lane0
ARP:  

Normally, the reflected ARP Request is suppressed. If the lane device is set to promiscuous mode, all packets are passed to upper layers, and so the upper instances receive Sun's own packet and raise this message:


Feb 10 12:12:30 sissi unix: IP: Hardware address '08:00:20:82:8f:91' 
trying to be our address 192.168.031.054!