PRVF-7617: TCP connectivity check failed for subnet (Doc ID 1335136.1)

rongshiyuan發表於2015-02-22

PRVF-7617: TCP connectivity check failed for subnet (Doc ID 1335136.1)


In this Document

Purpose
Details
  Known Issues
  To verify manually
   
When to ignore the error?
References

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 and later
Information in this document applies to any platform.

Purpose

The note is to list problems, solutions or workarounds that's related to the following error:

PRVF-7617: TCP connectivity check failed for subnet

OR

PRVF-7617 : Node connectivity between "racnode1 : 10.10.10.148" and "racnode2 : 10.10.10.149" failed


TCP connectivity check failed for subnet "10.10.10.0"

 
OR
 
 
PRVF-7616 : Node connectivity failed for subnet "10.10.16.0" between "racnode1 - eth5 : 10.10.16.109" and "racnode2 - eth5 : 10.10.16.121"

Result: Node connectivity failed for subnet "10.10.16.0"



When the error happens, likely OUI will report:

[INS-41110] Specified network interface doesnt maintain connectivity across cluster nodes.
[INS-41112] Specified network interface doesnt maintain connectivity across cluster nodes.



Details

 

Known Issues

 

  • bug 12849377 - CVU should check only selected network interfaces (ignore "do not use")
CVU checks network interfaces that's marked "do not use", fixed in 11.2.0.3 GI PSU1

  • bug 9952812 - CVU SHOULD RETURN WARNING INSTEAD OF FATAL ERROR FOR VIRBR0
Happens on Linux if network adapter virbr0 exists, fixed in 11.2.0.3.

The fix introduces new CVU parameter (-network) to check only specified networks:

runcluvfy.sh stage -pre crsinst -n , -networks "eth*" -verbose

 

As Solaris does not support the socket option SO_RCVTIMEO, TCP server fails to start:

In this example, racnode1 is nodename and 10.1.0.11 is the IP to test connectivity:

/tmp/CVU__/exectask.sh -runTCPserver racnode1 10.1.0.11

location:prvnconss1 opname:free port unavailable category:0 DepInfo: 99
Exectask:runTCPServer failed
..
Error running TCP server

bug 11903488 also remove the port range of 49900-50000 to use the first available
exectask.sh -chkTCPclient

 


location:prvnconcc3 opname:client to server connection fail
category:0 otherInfo: Client to server connection failed, errno: 227
DepInfo: 227
-1
Exectask:chkTCPClient failed 1
Error checking TCP communication
1

 

When more than one network interface are on the same subnet, it is possible that the wrong interface is used to verify TCP connectivity.

 

Refer to note 1286394.1 for details.

 

  • bug 16953470 - affects Solaris only, happens when "hostmodel" is set to strong
CVU trace:
[7041@racnode1] [Thread-408] [ 2013-06-13 12:41:17.772 GMT+04:00 ] [StreamReader.run:65] OUTPUT>/usr/sbin/ping -i 192.168.169.2 192.168.169.2 3 /usr/sbin/ping: sendto Network is unreachable

Manually run the "ping -i" command, receives same error

To find out current "hostmodel":

# ipadm show-prop -p hostmodel ip
PROTO PROPERTY PERM CURRENT PERSISTENT DEFAULT POSSIBLE
ipv6 hostmodel rw weak weak weak strong, src-prio, rity, weak
ipv4 hostmodel rw weak weak weak strong, src-prio, rity, weak

To change hostmodel: 

ipadm set-prop -p hostmodel=weak ipv4
ipadm set-prop -p hostmodel=weak ipv6

The workaround is to set hostmodel to weak  

In addition, Solaris bug 16827053 is open to fix on OS level.

 

The bug is closed as duplicate of internal bug 17070860 which is fixed in 11.2.0.4

 

To verify manually


Repeat the following for each interface as grid user:

runcluvfy.sh comp nodecon -i -n ,, -verbose

 
When to ignore the error?

If the error happened on network that's not related to Oracle Clusterware, it can be ignored, i.e. if happened on administrative network and not affecting anything, it can be ignored. 



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18-Jan-2014
18-Jan-2014
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