[Beowulf] Fundamental HPC cluster problem

[John Hearns]

http://www.macvendorlookup.com/   shows:

The  eth3 device is manufactured by TP-Link Technologies

The eth0 device by Dell

The eth1 device by Intel

The eth2 device by Intel

I would check the cable to eth3.  Are the lights coming up?
Run ethtool eth3  please

Why are you choosing to use the TP-Link card instead of one of the onboard Intel interfaces?
Your call of course.



From: John Thingstad [mailto:jpthing at online.no]
Sent: 21 July 2015 07:10
To: John Hearns; 'beowulf at beowulf.org'
Subject: Re: [Beowulf] Fundamental HPC cluster problem

john at Pandora:~$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether 14:cc:20:05:f2:1c brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.1/24 brd 192.168.10.255 scope global eth3
       valid_lft forever preferred_lft forever
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether d4:ae:52:cc:87:bb brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.100/24 brd 192.168.0.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::d6ae:52ff:fecc:87bb/64 scope link
       valid_lft forever preferred_lft forever
4: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 90:e2:ba:4c:54:b8 brd ff:ff:ff:ff:ff:ff
5: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 90:e2:ba:4c:54:b9 brd ff:ff:ff:ff:ff:ff

john at Pandora:~$ ip route
default via 192.168.0.1 dev eth0
192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.100
192.168.10.0/24 dev eth3  proto kernel  scope link  src 192.168.10.1

john at Pandora:~$ sudo service isc-dhcp-server restart
john at Pandora:~$ sudo tail -f /var/log/syslog
...
Jul 21 08:06:13 Pandora kernel: [71959.936774] init: isc-dhcp-server main process (1293) killed by TERM signal
Jul 21 08:06:13 Pandora dhcpd: Not searching LDAP since ldap-server, ldap-port and ldap-base-dn were not specified in the config file
Jul 21 08:06:13 Pandora dhcpd: Not searching LDAP since ldap-server, ldap-port and ldap-base-dn were not specified in the config file
Jul 21 08:06:13 Pandora dhcpd: Wrote 0 leases to leases file.

Den 21. juli 2015 02:49, skrev John Hearns:
John

Please give is the results of ‘ip addr’

Also look closely at the system log messages when dhcp starts.
Stop the dhcp service, then restart it when running a tail –f on the system log.

If that does not help, stop the dhcp service and run dhcpd with the ‘-d’ flag in a separate window,
and give it the argument eth3 on the command line ?



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