dhcp option 150
Glenn Satchell
Glenn.Satchell at uniq.com.au
Tue Aug 25 02:23:56 UTC 2009
Hi Ali
If you look at the request from the client it includes option 55, which
is the list of options it wants to be returned by the server. The
client does not ask for option 150, so the server does not send it. If
the client does not ask for a parameter it is likely that it won't
understand what to do with it.
Parameter-Request Option 55
You could try configuring the client to ask for the option, this may
involve some coding to do something sensible with the value. For
ISC dhclient, try man dhclient.conf and man dhclient
regards,
-glenn
>Date: Mon, 24 Aug 2009 18:39:20 +0200
>From: Ali Al-Shabibi <ali.al-shabibi at cern.ch>
>To: <dhcp-users at lists.isc.org>
>Subject: dhcp option 150
>
>Hello,
>
> I have been trying to netboot my machines and I have been running
>into a problem where my option for the grub file (option 150) is not
>sent by the dhcp server. Here is my dhcp configuration:
>
>option space netboot;
>option netboot.grub-menu code 150 = text;
>ddns-update-style none ;
>subnet 192.168.1.0 netmask 255.255.255.0 {
> default-lease-time 600;
> max-lease-time 7200;
>}
>
>host pc-openflow-01 {
> hardware ethernet 00:02:B3:0A:7F:DB;
> fixed-address 192.168.1.1;
> option netboot.grub-menu "(nd)/boot/grub.lst";
> filename "/pc-openflow-01/boot/pxegrub";
>}
>
>And is the dump of the dhcp exchanges seen on the wire:
>
>pcatb86 ~ # tcpdump -i eth1 -vvv -s 0 -n port 67 and port 68
>tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size
>65535 bytes
>16:27:43.131501 IP (tos 0x0, ttl 20, id 0, offset 0, flags [none], proto
>UDP (17), length 576) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok]
>BOOTP/DHCP, Request from 00:02:b3:09:5c:08, length 548, xid 0xb4095c08,
>secs 1024, Flags [Broadcast] (0x8000)
> Client-Ethernet-Address 00:02:b3:09:5c:08
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: Discover
> Parameter-Request Option 55, length 13:
> Subnet-Mask, Default-Gateway, Vendor-Class, Vendor-Option
> BF, Option 128, Option 129, Option 130
> Option 131, Option 132, Option 133, Option 134
> Option 135
> MSZ Option 57, length 2: 1260
> GUID Option 97, length 17: 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
> ARCH Option 93, length 2: 0
> NDI Option 94, length 3: 1.2.1
> Vendor-Class Option 60, length 32:
>"PXEClient:Arch:00000:UNDI:002001"
> END Option 255, length 0
> PAD Option 0, length 0, occurs 223
>16:27:43.133812 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
>proto UDP (17), length 328) 192.168.1.254.67 > 255.255.255.255.68: [udp
>sum ok] BOOTP/DHCP, Reply, length 300, xid 0xb4095c08, secs 1024, Flags
>[Broadcast] (0x8000)
> Your-IP 192.168.1.3
> Client-Ethernet-Address 00:02:b3:09:5c:08
> file "/pc-openflow-03/boot/pxegrub"
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: Offer
> Server-ID Option 54, length 4: 192.168.1.254
> Lease-Time Option 51, length 4: 600
> Subnet-Mask Option 1, length 4: 255.255.255.0
> END Option 255, length 0
> PAD Option 0, length 0, occurs 38
>16:27:45.098534 IP (tos 0x0, ttl 20, id 1, offset 0, flags [none], proto
>UDP (17), length 576) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok]
>BOOTP/DHCP, Request from 00:02:b3:09:5c:08, length 548, xid 0xb5095c08,
>secs 1280, Flags [Broadcast] (0x8000)
> Client-Ethernet-Address 00:02:b3:09:5c:08
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: Discover
> Parameter-Request Option 55, length 13:
> Subnet-Mask, Default-Gateway, Vendor-Class, Vendor-Option
> BF, Option 128, Option 129, Option 130
> Option 131, Option 132, Option 133, Option 134
> Option 135
> MSZ Option 57, length 2: 1260
> GUID Option 97, length 17: 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
> ARCH Option 93, length 2: 0
> NDI Option 94, length 3: 1.2.1
> Vendor-Class Option 60, length 32:
>"PXEClient:Arch:00000:UNDI:002001"
> END Option 255, length 0
> PAD Option 0, length 0, occurs 223
>16:27:45.100216 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
>proto UDP (17), length 328) 192.168.1.254.67 > 255.255.255.255.68: [udp
>sum ok] BOOTP/DHCP, Reply, length 300, xid 0xb5095c08, secs 1280, Flags
>[Broadcast] (0x8000)
> Your-IP 192.168.1.3
> Client-Ethernet-Address 00:02:b3:09:5c:08
> file "/pc-openflow-03/boot/pxegrub"
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: Offer
> Server-ID Option 54, length 4: 192.168.1.254
> Lease-Time Option 51, length 4: 600
> Subnet-Mask Option 1, length 4: 255.255.255.0
> END Option 255, length 0
> PAD Option 0, length 0, occurs 38
>16:27:49.052819 IP (tos 0x0, ttl 20, id 2, offset 0, flags [none], proto
>UDP (17), length 576) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok]
>BOOTP/DHCP, Request from 00:02:b3:09:5c:08, length 548, xid 0xb6095c08,
>secs 1792, Flags [Broadcast] (0x8000)
> Client-Ethernet-Address 00:02:b3:09:5c:08
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: Discover
> Parameter-Request Option 55, length 13:
> Subnet-Mask, Default-Gateway, Vendor-Class, Vendor-Option
> BF, Option 128, Option 129, Option 130
> Option 131, Option 132, Option 133, Option 134
> Option 135
> MSZ Option 57, length 2: 1260
> GUID Option 97, length 17: 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
> ARCH Option 93, length 2: 0
> NDI Option 94, length 3: 1.2.1
> Vendor-Class Option 60, length 32:
>"PXEClient:Arch:00000:UNDI:002001"
> END Option 255, length 0
> PAD Option 0, length 0, occurs 223
>16:27:49.054346 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
>proto UDP (17), length 328) 192.168.1.254.67 > 255.255.255.255.68: [udp
>sum ok] BOOTP/DHCP, Reply, length 300, xid 0xb6095c08, secs 1792, Flags
>[Broadcast] (0x8000)
> Your-IP 192.168.1.3
> Client-Ethernet-Address 00:02:b3:09:5c:08
> file "/pc-openflow-03/boot/pxegrub"
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: Offer
> Server-ID Option 54, length 4: 192.168.1.254
> Lease-Time Option 51, length 4: 600
> Subnet-Mask Option 1, length 4: 255.255.255.0
> END Option 255, length 0
> PAD Option 0, length 0, occurs 38
>16:27:56.961271 IP (tos 0x0, ttl 20, id 3, offset 0, flags [none], proto
>UDP (17), length 576) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok]
>BOOTP/DHCP, Request from 00:02:b3:09:5c:08, length 548, xid 0xb6095c08,
>secs 1792, Flags [Broadcast] (0x8000)
> Client-Ethernet-Address 00:02:b3:09:5c:08
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: Request
> Requested-IP Option 50, length 4: 192.168.1.3
> Parameter-Request Option 55, length 13:
> Subnet-Mask, Default-Gateway, Vendor-Class, Vendor-Option
> BF, Option 128, Option 129, Option 130
> Option 131, Option 132, Option 133, Option 134
> Option 135
> MSZ Option 57, length 2: 1260
> Server-ID Option 54, length 4: 192.168.1.254
> GUID Option 97, length 17: 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
> ARCH Option 93, length 2: 0
> NDI Option 94, length 3: 1.2.1
> Vendor-Class Option 60, length 32:
>"PXEClient:Arch:00000:UNDI:002001"
> END Option 255, length 0
> PAD Option 0, length 0, occurs 211
>16:27:56.963004 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
>proto UDP (17), length 328) 192.168.1.254.67 > 255.255.255.255.68: [udp
>sum ok] BOOTP/DHCP, Reply, length 300, xid 0xb6095c08, secs 1792, Flags
>[Broadcast] (0x8000)
> Your-IP 192.168.1.3
> Client-Ethernet-Address 00:02:b3:09:5c:08
> file "/pc-openflow-03/boot/pxegrub"
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: ACK
> Server-ID Option 54, length 4: 192.168.1.254
> Lease-Time Option 51, length 4: 600
> Subnet-Mask Option 1, length 4: 255.255.255.0
> END Option 255, length 0
> PAD Option 0, length 0, occurs 38
>16:28:37.493322 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto
>UDP (17), length 576) 0.0.0.0.68 > 255.255.255.255.67: [no cksum]
>BOOTP/DHCP, Request from 00:02:b3:09:5c:08, length 548, xid 0x6c1a097c,
>secs 2, Flags [none] (0x0000)
> Client-Ethernet-Address 00:02:b3:09:5c:08
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: Discover
> Parameter-Request Option 55, length 7:
> Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname
> Domain-Name, RP, YD
> END Option 255, length 0
> PAD Option 0, length 0, occurs 295
>16:28:37.494734 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
>proto UDP (17), length 328) 192.168.1.254.67 > 192.168.1.3.68: [udp sum
>ok] BOOTP/DHCP, Reply, length 300, xid 0x6c1a097c, secs 2, Flags [none]
>(0x0000)
> Your-IP 192.168.1.3
> Client-Ethernet-Address 00:02:b3:09:5c:08
> file "/pc-openflow-03/boot/pxegrub"
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: Offer
> Server-ID Option 54, length 4: 192.168.1.254
> Lease-Time Option 51, length 4: 600
> Subnet-Mask Option 1, length 4: 255.255.255.0
> END Option 255, length 0
> PAD Option 0, length 0, occurs 38
>16:28:37.503293 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto
>UDP (17), length 576) 0.0.0.0.68 > 255.255.255.255.67: [no cksum]
>BOOTP/DHCP, Request from 00:02:b3:09:5c:08, length 548, xid 0x6c1a097c,
>secs 2, Flags [none] (0x0000)
> Client-Ethernet-Address 00:02:b3:09:5c:08
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: Request
> Server-ID Option 54, length 4: 192.168.1.254
> Requested-IP Option 50, length 4: 192.168.1.3
> Parameter-Request Option 55, length 7:
> Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname
> Domain-Name, RP, YD
> END Option 255, length 0
> PAD Option 0, length 0, occurs 283
>16:28:37.504509 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
>proto UDP (17), length 328) 192.168.1.254.67 > 192.168.1.3.68: [udp sum
>ok] BOOTP/DHCP, Reply, length 300, xid 0x6c1a097c, secs 2, Flags [none]
>(0x0000)
> Your-IP 192.168.1.3
> Client-Ethernet-Address 00:02:b3:09:5c:08
> file "/pc-openflow-03/boot/pxegrub"
> Vendor-rfc1048 Extensions
> Magic Cookie 0x63825363
> DHCP-Message Option 53, length 1: ACK
> Server-ID Option 54, length 4: 192.168.1.254
> Lease-Time Option 51, length 4: 600
> Subnet-Mask Option 1, length 4: 255.255.255.0
> END Option 255, length 0
> PAD Option 0, length 0, occurs 38
>
>
>The client machine tries to fetch the grum menu file from /tftp/menu.lst
>rather than /boot/grub.lst.
>
>I am running dhcp version 3.1.2 on gentoo. I cannot see anything wrong
>with my config, but evidently there is an error. Has anyone experienced
>the same problem?
>
>Thanks for your help,
>
>
>--
>Ali Al-Shabibi
>Doctoral Student
>PH-ATD
>CERN - European Organization for Nuclear Research
>Office: 513 R-018
>ali.al-shabibi at cern.ch
>Tel : +41 22 767 86 46
>Mob : +41 78 609 04 84
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