Experimental Physics and
Industrial Control System

"Steven M. Hartman" <[email protected]> · Thu, 03 Dec 2009 11:59:19 -0500

leige wrote:

Recently we experienced a trouble in one IOC, it does not respond to telnet, but it says alive if I ping it. New CA connections can not be setup to it, but those CAs which have been setup can work normally. We got lots of warnings on this IOC's console,

-> 0xc26180 (CA_UDP): arpresolve: can't allocate llinfo0xc26180 (CA_UDP): arpres

olve: can't allocate llinfo0xc26180 (CA_UDP): arpresolve: can't allocate llinfo0

"arpresolve: can't allocate llinfo" usually indicates an incorrect

netmask (or may be a bad route). Your IOC is sending out an arp

request to map an IP address to a MAC address on the local network

and is getting back a response which appears to not be local.

Check the netmask on the IOC (ifShow). If that looks OK, check the

routing table (routeShow) and the arp table (arptabShow). If that

doesn't show you the problem, try snooping the network to see

which IP address it is looking up and which host on the network is

responding.

--
Steven Hartman
[email protected] || 865-466-6473

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System