Even though there is no error in network devices, the following message is output and HUB monitoring ends abnormally.
hanet: ERROR: 87000: polling status changed: primary polling failed. (hme0,target=192.13.71.20) hanet: ERROR: 87100: polling status changed: secondary polling failed. (hme1,target=192.13.71.21) |
In NIC switching mode, it may take time before transmission becomes possible due to establishing a data link at Ethernet level following activation of an interface or the STP (Spanning Tree Protocol) transfer delay timer. Then, the status will not change to allow for immediate transmission even if the interface is activated. Generally, after the activation of the interface, the process establishing a data link will finish within several seconds, but in the instance of setting up the use of the STP, it may take 30 to 50 seconds until the status becomes to allow for transmission due to the STP transfer delay timer.
Therefore, if using the hanetpoll on command to shorten the link up completion waiting time (default value: 60 seconds), ping monitoring fails and switching occurs.
In such a case, extend the time to wait for linking up (default value: 60 seconds) by the hanetpoll on command according to the transfer delay time.
On the HUB where STP is running, possible next connection could take twice as the transfer delay time (normally 30 sec) after linked up. Standard link up latency of operating STP can be derived from the equation below.
For verifying STP transfer delay time, see the manual of HUB you are using.
link up latency > STP transfer delay time x 2 + monitoring period x number of monitoring |
Note
To operate ping monitoring over the system that runs firewall, configure the firewall so that ping can pass through the firewall. Otherwise, it fails to operate ping monitoring.
The firewall settings must be the same for both of the primary and secondary interfaces.
Takes time to execute an operation command of a Redundant Line Control function.
Takes time to activate a userApplication or to switch nodes at the cluster operation.
When a host name or an IP address specified in the information of a virtual interface, the monitor-to information, etc. is not described in /etc/inet/hosts file, or when "files" are not specified at the top in an address solution of /etc/nsswitch.conf, occasionally it takes time to process an internally executed name-address conversion. Therefore, it takes time to execute a command, or for the cluster state to change. Check that all IP addresses and host names to use in a Redundant Line Control function are described in /etc/inet/hosts, and that /etc/inet/hosts is referred first at name-address conversion.
Even though TCP communication by a virtual IP is executed in GS/SURE linkage mode, the number of the connections is not shown when displayed how the connection is divided using a dsphanet command.
# /opt/FJSVhanet/usr/sbin/dsphanet -c
Name IFname Connection
+------+------+----------+
sha0 sha2 -
sha1 -
sha10 sha12 -
sha11 - |
When dividing TCP connection in GS/SURE linkage mode, necessary to define the information of the other system with a hanetobserv command. Any protocol other than TCP is not divided. UDP and ICMP are sent according to the route information.
