Hi Chris,
Thanks for pointing it out. xCAT uses perl SNMP module which has
default snmp version 3. The Net::SNMP sets default snmp version to 1. So
the doc on switches table for snmpversion is wrong. We will remove the
default phrase and the user is expected to in explicitly set it up.
Thanks,
Ling
From: Christopher Samuel <[email protected]>
To: xCAT Users Mailing list <[email protected]>
Date: 08/12/2015 11:53 PM
Subject: [xcat-user] v2.10: tabdump says xCat defaults to SNMPv1,
but actually use SNMPv3
Hi folks,
This is xCAT 2.10 on RHEL 6.7.
Just trying to set up some FCP's here and have had a devil of a time
trying to get them to be discovered, was always seeing:
[root@snowy-m xcat]# configfpc --verbose -i bond0 --ip 172.30.101.131
Default IP address is 172.30.101.131
Default route address is 172.30.101.132/16
Running ip addr add dev bond0 172.30.101.132/16
Found 172.30.101.131 address
Creating default FPC node deffpc with IP 172.30.101.131 for later use with
rspconfig
Found IP 172.30.101.131 and MAC 6c:ae:8b:09:4b:66
Mapped MAC 6c:ae:8b:09:4b:66 to node
Error: No FPC found that is associated with MAC address 6c:ae:8b:09:4b:66.
Check to see if the switch and switch table contain the information needed
to locate this FPC MAC
Removing default IP 172.30.101.131 from the arp table
Running ip addr del dev bond0 172.30.101.132/16
Removing default FPC node definition deffpc
Running internal xCAT command: noderm ...
To cut a long story short, investigating with wireshark revealed
that whilst "tabdump -d switches" says:
snmpversion: The version to use to communicate with switch. SNMPv1 is
assumed by default.
This is not actually true, it uses SNMPv3 by default.
Changing our switch definition to force SNMPv1 makes everything work
(hooray).
Is this a known issue?
All the best,
Chris
--
Christopher Samuel Senior Systems Administrator
VLSCI - Victorian Life Sciences Computation Initiative
Email: [email protected] Phone: +61 (0)3 903 55545
http://www.vlsci.org.au/ http://twitter.com/vlsci
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