HP-UX cmmodnet: Network interface lan3 has already been in this state

Issue:-

Even though lan3 is running perfectly fine MCSG thinks it as down and fail over to standby lan. We will not be able to  fail back  to lan3 (primary lan)


# cmmodnet -e lan3

cmmodnet: Network interface lan2 has already been in this state.



cmviewcl output for this host.



# cmviewcl -v -n unixmemoirs-01



  NODE                STATUS       STATE

  unixmemoirs-01        up           running



    Network_Parameters:

    INTERFACE    STATUS                     PATH                NAME

    PRIMARY      down (Link and IP)         0/0/0/4/0/0/0       lan3

    PRIMARY      up                         0/0/0/3/0/0/0       lan2

    PRIMARY      up                         0/0/0/3/0/0/1       lan1



Syslog output.


Aug 19 17:06:22 unixmemoirs-01 syslog: cmmodnet -e lan3

Aug 19 17:06:22 unixmemoirs-01 cmnetd[21252]: Request to enable interface lan3

Aug 19 17:06:22 unixmemoirs-01 cmnetd[21252]: Attempt to enable network interface lan3 when it is already enabled.

 

Trouble shooting done :-

Verified interface status in lanadmin

Administration Status (value)   = up(1)
Operation Status (value)        = up(1)

Verified ifconfig status

# ifconfig la3
lan2: flags=2000000000001843<UP,BROADCAST,RUNNING,MULTICAST,CKO,TSO>



verified  link connectivity from  another interface in the same server

# linkloop -i 6 0x64315001e1d8

Link connectivity to LAN station: 0x64315000e1d8

-- OK

Verified link connectivity to another server

# linkloop -i3 0x68B599923388

Link connectivity to LAN station: 0x68B599924988

-- OK

#


Everything is fine. So what will be the issue. After long trouble shooting found out the issue. Outbound packet count not increasing.


Outbound Unicast Packets        = 250741234


Since the outbound packet count is not increasing cmcld thinks as link layer is down and marks lan3 as down and failover to standby lan.

Solution:

Reset lan3.

#lanadmin -r 3