This section describes the errors that may be encountered when connecting RLINKs. To be able to troubleshoot RLINK connect problems, it is important to understand the RLINK connection process.
Connecting the Primary and Secondary RLINKs is a two-step operation. The first step, which attaches the RLINK, is performed by issuing the
startrep command. The second step, which connects the RLINKs, is performed by the kernels on the Primary and Secondary hosts.
startrep command is issued, VVR performs a number of checks to ensure that the operation is likely to succeed, and if it does, the command changes the state of the RLINKs from detached/stale to enabled/active. The command then returns success.
If the command is successful, the kernel on the Primary is notified that the RLINK is enabled and it begins to send messages to the Secondary requesting it to connect. Under normal circumstances, the Secondary receives this message and connects. The state of the RLINKs then changes from enabled/active to connect/active.
If the RLINK does not change to the connect/active state within a short time, there is a problem preventing the connection. This section describes a number of possible causes. An error message indicating the problem may be displayed on the console.
Make sure that the network is working as expected. Network problems might affect VVR, such as prevention of RLINKs from connecting or low performance. Possible problems could be high latency, low bandwidth, high collision counts, and excessive dropped packets.
There should be no packet loss or very little packet loss. To ensure that the network can transmit large packets issue the following command on each host for an RLINK in a private disk group. For an RLINK in a shared disk group, issue the following command on the logowner on the Primary and Secondary:
vxiodcommand on each host to ensure that there are active I/O daemons. If the output is
volume I/O daemons running, activate I/O daemons by issuing the following command:
Local Address Remote Address State
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