Originally posted by: Greeka

Hi,
 

We are begining new two site installation PowerHA System Mirror Enterprise 7.1.2. We are creating new cluster, defining 2 site with one node in each.

After creating networks for service alias, functions "verify and sync" don't work. First node from oen site tried to mping node from other site.

mping failed with error.

Cluster Name: cluster
Cluster Connection Authentication Mode: Standard
Cluster Message Authentication Mode: None
Cluster Message Encryption: None
Use Persistent Labels for Communication: No
Repository Disks: Site 1: None, Site 2:  
Cluster IP Addresses: Cluster: , Site 1: 228.91.193.23, Site 2: 228.91.193.24
There are 2 node(s) and 4 network(s) defined
NODE node1:
        Network net_XD_ip_01
                node1_xd      10.10.10.11/25
        Network net_XD_ip_02
        Network net_ether_01
                node1             10.10.100.11/24
        Network net_ether_02
NODE node2:
        Network net_XD_ip_01
        Network net_XD_ip_02
                node2_xd      10.10.11.12/25
        Network net_ether_01
        Network net_ether_02
                node2             10.10.200.12/24
 

Verifying multicast communication with mping.
ERROR: Multicast communication with node node2 using mping failed.
Errors encountered verifying communications between nodes.ERROR:        Unable to communicate using multicast messages
 

ck_comm: Local node name is: node1

ck_comm: Called Fri
ck_comm: node: node1

node1

node2

ck_comm: node: node2

node2
node1
ck_mping: Called Fri Nov

/usr/sbin/mping version 1.1
Connecting using IPv4.
mpinging 228.91.208.23/4098 with ttl=1:

Sleeping for 1 second to wait for any additional packets to arrive.

--- 228.91.208.23 mping statistics ---
5 packets transmitted, 0 packets received, 100% packet loss
round-trip min/avg/max = 0.000/0.000/0.000 ms
/usr/sbin/mping version 1.1
Connecting using IPv4.
mpinging 228.91.208.23/4098 with ttl=1:

Sleeping for 1 second to wait for any additional packets to arrive.

--- 228.91.208.23 mping statistics ---
5 packets transmitted, 0 packets received, 100% packet loss
round-trip min/avg/max = 0.000/0.000/0.000 ms
ck_mping: Running 'mping -r -v -c 5 -a 228.91.208.23' on node node2

ck_mping: Running 'mping -s -v -c 5 -a 228.91.208.23' on the local node

ERROR: Multicast communication with node node2 using mping failed

Errors encountered verifying communications between nodes. Fri Nov
 

Whath we doing wrong?

Originally posted by: pmcwatt

I haven't setup a linked cluster before but from what i understand a linked cluster doesn't use multicast cross site - it only uses unicast.

Have you setup the 2 repository disks yet? (one per site). You might want to do this first then try verify & synch again.

If you haven't already done so you should take a look at this Redbook:

IBM PowerHA SystemMirror 7.1.2 Enterprise Edition for AIX

Originally posted by: cla

This seems like this known PowerHA 712 bug:

   IV42371 POWERHA: CLVER GENERATES MULTICAST ISSUES FOR A LINKED CLUSTER

Consider to call IBM Support.

Thanks, Claudio.

Originally posted by: Ravikrithik_U

Hi Greeka ,

I have hit the same problem. Did you resolve your issue ? If yes can you please provide me the solution.

Originally posted by: Greeka

Hi https://www.ibm.com/developerworks/community/profiles/html/profileView.do?userid=270003XQPP

We have solved the problem. We got patch from techsupport which change file /usr/es/sbin/cluster/diag/ver_mping

Attachment(s)

IV42371s3a.130823.epkg.Z   80 KB 1 version

Originally posted by: jagdhish_Aix

Hello  Greek,

I'm also facing the same issue and applied the efix but still ,,issue persist ..any idea .

During the sync:

Saving existing /var/hacmp/clverify/ver_mping/ver_mping.log to /var/hacmp/clverify/ver_mping/ver_mping.log.bak
Verifying clcomd communication, please be patient.
Verifying multicast communication with mping.
ERROR: Multicast communication with node Server2  using mping failed.
Errors encountered verifying communications between nodes.
ERROR:  Unable to communicate using multicast messages

round-trip min/avg/max = 0.000/0.000/0.000 ms
ck_mping: Running 'mping -r -v -c 5 -a 228.168.101.43' on node Server1
 
ck_mping: Running 'mping -s -v -c 5 -a 228.168.101.43' on the local node server1
 
ERROR: Multicast communication with node server2  using mping failed
 
Errors encountered verifying communications between nodes. Thu Mar 27 21:09:53 EST 2014

[server1:root:/home/root:] halevel -s
7.1.2 SP3
[server1:root:/home/root:] oslevel -s
6100-08-03-1339

Any idea ..................

Cheers

Jag

Originally posted by: PrasadKunchala

@ Jagdish,

what is the type of disk you are using for repository disk , if it is VNX we might have hard time adding it to cluster , due to which the verify and sync fails.(one of the scenario)

on both nodes perform this on the disk being used for repository.

dd if=/dev/zero of=/dev/rhdisk5 bs=1M
rmdev -dl hdisk5
cfgmgr
chdev -l hdisk5 -a algorithm=round_robin -a hcheck_interval=10 -a hcheck_mode=nonactive -a reserve_policy=no_reserve -P
chdev -l hdisk5 -a pv=yes

readd it to cluster and verify and sync

Regards,

PK