[xcat-user] makedhcp creates almost replica subnets

Wed Sep 9 17:44:23 MDT 2009

We caught the bad cubnet (192.169) earlier. The problem persists. In fact, when I do a nodeset {NODE} install, it appends the bad subnet information to the existing /etc/dhcpd.conf.

ifconfig on the management node:

eth0      Link encap:Ethernet  HWaddr 00:1A:64:C6:1A:38
          inet addr:172.16.1.1  Bcast:172.16.255.255  Mask:255.255.0.0
          inet6 addr: fe80::21a:64ff:fec6:1a38/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:58726421 errors:0 dropped:9771470 overruns:0 frame:0
          TX packets:40370440 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:35095442596 (33469.6 Mb)  TX bytes:6016175949 (5737.4 Mb)
          Interrupt:90 Memory:ce000000-ce012100

eth0:1    Link encap:Ethernet  HWaddr 00:1A:64:C6:1A:38
          inet addr:192.168.70.254  Bcast:192.168.70.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:90 Memory:ce000000-ce012100

eth0:2    Link encap:Ethernet  HWaddr 00:1A:64:C6:1A:38
          inet addr:192.168.128.254  Bcast:192.168.128.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:90 Memory:ce000000-ce012100

eth0:3    Link encap:Ethernet  HWaddr 00:1A:64:C6:1A:38
          inet addr:192.168.17.1  Bcast:192.168.17.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:90 Memory:ce000000-ce012100

eth1      Link encap:Ethernet  HWaddr 00:1A:64:C6:1A:3A
          inet addr:198.119.134.238  Bcast:198.119.135.255  Mask:255.255.254.0
          inet6 addr: fe80::21a:64ff:fec6:1a3a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:13005332 errors:0 dropped:10498793 overruns:0 frame:0
          TX packets:2743819 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2323777393 (2216.1 Mb)  TX bytes:1303689059 (1243.2 Mb)
          Interrupt:169 Memory:ca000000-ca012100

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:2002040 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2002040 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:783224382 (746.9 Mb)  TX bytes:783224382 (746.9 Mb)

vlan2     Link encap:Ethernet  HWaddr 00:1A:64:C6:1A:38
          inet addr:192.168.18.1  Bcast:192.168.255.255  Mask:255.255.0.0
          inet6 addr: fe80::21a:64ff:fec6:1a38/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:35083279 errors:0 dropped:0 overruns:0 frame:0
          TX packets:20345285 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:23979430638 (22868.5 Mb)  TX bytes:4187346031 (3993.3 Mb)

________________________________________
From: xcat-user-bounces at lists.xcat.org [xcat-user-bounces at lists.xcat.org] On Behalf Of Jarrod B Johnson [jbjohnso at us.ibm.com]
Sent: Wednesday, September 09, 2009 3:29 PM
To: xCAT Users Mailing list
Cc: xcat-user at lists.xcat.org; xcat-user-bounces at lists.xcat.org
Subject: Re: [xcat-user] makedhcp creates almost replica subnets

Can I see the output of ifconfig on that system?

[cid:1__=0ABBFCBFDFF88DA98f9e8a93df938 at us.ibm.com]"Caruthers, Christian (LARC-E301)[SCIENCE SYSTEMS AND APPLICATIONS INC]" ---09/09/2009 15:16:41---When running makedhcp -n, I see the following message:

From:
"Caruthers, Christian (LARC-E301)[SCIENCE SYSTEMS AND APPLICATIONS INC]" <christian.caruthers at nasa.gov>

To:
"xcat-user at lists.xcat.org" <xcat-user at lists.xcat.org>

Date:
09/09/2009 15:16

Subject:
[xcat-user] makedhcp creates almost replica subnets

________________________________

When running makedhcp -n, I see the following message:
Warning: No dynamic range specified for 192.168.18.0, unknown systems on this network will not receive an address

In my networks table, I have the following:

"management","172.16.0.0","255.255.0.0","eth0","172.16.1.1","172.16.1.1","172.16.1.1","172.16.1.1","172.16.1.1",,,,,
"cluster","192.168.0.0","255.255.0.0","vlan2","192.168.18.1","192.168.18.1","192.168.18.1","192.168.18.1","192.168.18.1",,"192.168.18.10-192.169.28.254",,,

Notice the dynamic range for the 192.168..0.0 network. This is our internal cluster network over which installations are carried out. The 172.16.0.0 is for management modules, switches and storage controllers. ".1" on both networks is the xcat manager.

My site tabe shows the following:
"xcatdport","3001",,
"xcatiport","3002",,
"tftpdir","/tftpboot",,
"master","192.168.18.1",,
"domain","cluster.net",,
"installdir","/install",,
"timezone","US/Eastern",,
"nameservers","192.168.18.1,172.16.1.1",,
"dhcpinterfaces","coil-blue|vlan2;nsd|vlan2;compute|vlan2;x3950|vlan2;scf|vlan2",,
"ntpservers","192.168.18.1",,
"forwarders","146.165.8.3,146.165.1.4",,
"rsh","/usr/bin/ssh",,
"rcp","/usr/bin/scp",,

On the manager, 192.168.18.1 is on interface "vlan2".

After running makedhcpd -n, /etc/dhcpd.conf shows the following:

omapi-key xcat_key;
shared-network vlan2 {
 subnet 192.168.18.0 netmask 255.255.255.255 {
   max-lease-time 43200;
   min-lease-time 43200;
   default-lease-time 43200;
   next-server  192.168.18.1;
   option log-servers 172.16.1.1,  192.168.18.1;
   option ntp-servers 172.16.1.1,  192.168.18.1;
   option domain-name "cluster.net";
   option domain-name-servers  172.16.1.1, 192.168.18.1;
   if option client-architecture = 00:00  { #x86
     filename "pxelinux.0";
   } else if option vendor-class-identifier = "Etherboot-5.4"  { #x86
     filename "pxelinux.0";
   } else if option client-architecture = 00:02 { #ia64
      filename "elilo.efi";
   } else if substring(filename,0,1) = null { #otherwise, provide yaboot if the client isn't specific
      filename "/yaboot";
   }
 } # 192.168.18.0/255.255.255.255 subnet_end
 subnet 192.168.0.0 netmask 255.255.0.0 {
   max-lease-time 43200;
   min-lease-time 43200;
   default-lease-time 43200;
   option routers  192.168.18.1;
   next-server  192.168.18.1;
   option log-servers 192.168.18.1;
   option ntp-servers 192.168.18.1;
   option domain-name "cluster.net";
   option domain-name-servers  192.168.18.1;
   if option client-architecture = 00:00  { #x86
     filename "pxelinux.0";
   } else if option vendor-class-identifier = "Etherboot-5.4"  { #x86
     filename "pxelinux.0";
   } else if option client-architecture = 00:02 { #ia64
      filename "elilo.efi";
   } else if substring(filename,0,1) = null { #otherwise, provide yaboot if the client isn't specific
      filename "/yaboot";
   }
   range dynamic-bootp 192.168.18.10 192.169.28.254;
 } # 192.168.0.0/255.255.0.0 subnet_end

The first subnet shouldn't bee there, and I'm trying to track down what's creating it. The second subnet looks fine.
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