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тАО03-15-2009 09:21 PM
тАО03-15-2009 09:21 PM
I am having problem with communication with an external device.
The IP of my machine is 192.168.1.1 with subnet mask 255.255.255.0.
The IP of the external device is 192.168.1.3 with subet mask 255.255.255.0
when i try to ping to this device it gives an error.
ucx>ping 192.168.1.3
%UCX-I-LOOPINACT, 192.168.1.3 does not respond.
the arp details show
ethernet internet host name ARP status
192.168.1.3 HDL01 INUSE
Ping to the localhost and the machine IP works.
What could be the problem?
Solved! Go to Solution.
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тАО03-15-2009 10:23 PM
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тАО03-15-2009 10:28 PM
тАО03-15-2009 10:28 PM
Re: UCX Communication Error
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тАО03-15-2009 11:07 PM
тАО03-15-2009 11:07 PM
Re: UCX Communication Error
Can you be sure, that sending and receiving ethernet packets via the LAN interface does work at all ? Is there anything else connected to that network, with which your system can communicate ? Pinging localhost and the local node IP address does NOT tell you, whether the LAN interface can actually send/receive patckets at all.
Check the LAN interface counters:
$ ANAL/SYS
SDA> SHOW LAN/COUNTER
...
SDA> EXIT
Does the external device have any counter information (like received/sent packets) ? Do these counters increase ?
Volker.
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тАО03-16-2009 12:13 AM
тАО03-16-2009 12:13 AM
Re: UCX Communication Error
I checked the Lan counters, where the received counter value is zero in all cases, but the sent counter shows some value.
Also I can see 8 ESA devices.
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тАО03-16-2009 12:20 AM
тАО03-16-2009 12:20 AM
Re: UCX Communication Error
The fact that you 'see 8 ESA devices' only indicates, that multiple protocols have been started on physical interface ESA0. SDA> SHOW LAN will show you the various protocols.
You now need to look at the counters of the external device. Does it receive any packets ? Does it send any packets ?
Can you connect any other TCPIP-capable device on that 'LAN' ? Maybe your laptop with the correct IP address instead of the 'external device' ?
Volker.
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тАО03-16-2009 12:26 AM
тАО03-16-2009 12:26 AM
Re: UCX Communication Error
Also i cannot connect my laptop as the Vaxstation uses BNC cable for ethernet communication.
Is there any other way?
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тАО03-16-2009 12:36 AM
тАО03-16-2009 12:36 AM
Re: UCX Communication Error
But this address is different from the ethernet address of ESA0 which is the ethernet device?
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тАО03-16-2009 12:42 AM
тАО03-16-2009 12:42 AM
Re: UCX Communication Error
There may be 2 MAC adresses involved with a network interface, the HW MAC address (ROM on interface) and the current MAC address, which may have been changed, if DECnet has been started on the interface !
$ ANAL/SYS
SDA> SHOW LAN/FULL
will show you both the hardware MAC address and the current MAC (physical) address as:
Physical address AA-00-04-00-9F-C5 Hardware address 00-12-3F-7D-96-A2
Volker.
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тАО03-16-2009 12:51 AM
тАО03-16-2009 12:51 AM
Re: UCX Communication Error
Physical address AA-00-04-00-14-28
Hardware address 08-00-2B-34-55-4E
Through which address should the communication take place?