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Status Not under consideration
Workspace PowerHA for AIX
Created by Guest
Created on Mar 6, 2017

netmon.cf: ICMP request SRC-address

Description:
Since updating cluster installations from AIX V7.1 TL3 SP5/PowerHA V7. 1.3 SP3 to AIX V7.1 TL4 SP2/PowerHA V7.1.3 SP5 we observe a different behaviour in the "ping" tests, originating from netmon.cf. On the older release only the source-IP address defined in netmon.cf was used for the ICMP requests to the target address defined. Since updating, all configured IP-addresses on a particular interface are used as source-IPs for the "ping" tests.

Idea priority Medium
  • Guest
    Sep 23, 2020

    The earlier implementation was in user space. The current implementation is in kernel as a kernel extension (CAA). CAA supports the following format of netmon.cf file

    !REQ owner target
    where owner can be !ALL or an IP address or an interface name.
    target can be an IP address or hostname

    If an interface name (such a en0) is provided as owner then CAA will use all the IP addresses configured on that interface as the source IP.

    If an IP address is given then CAA will figure out on which interface the IP address is configured and then use all the IP addresses configured on that interface as the source address. This was done mainly to ensure the interface is truly down in other words to get a better indication.