Date: Wed, 18 May 2016 18:49:02 -0400 From: Ian FREISLICH <ian.freislich@capeaugusta.com> To: current@freebsd.org Subject: r299512 breaks dhclient on some networks Message-ID: <15379a54-3e6e-2c2c-b41c-8def3af65bad@capeaugusta.com>
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Hi
I cannot for the life of me figure out why the change in r299512 breaks
DHCP on one network I use but not on another network.
The only clue I can find is that the request whose response is ignored
has the following client ID:
1:6:0:22:5f:70:a1:df
The request whose response is use has this client ID:
1:0:22:5f:70:a1:df
Here's a dhcpdump of the request/offer that gets ignored.
---------------------------------------------------------------------------
TIME: 2016-05-18 18:46:39.134
IP: 0.0.0.0 (00:22:5f:70:a1:df) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 92a34fc3
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: 00:22:5f:70:a1:df:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 1 (DHCPDISCOVER)
OPTION: 61 ( 8) Client-identifier 01:06:00:22:5f:70:a1:df
OPTION: 12 ( 3) Host name zen
OPTION: 55 ( 9) Parameter Request List 1 (Subnet mask)
28 (Broadcast address)
2 (Time offset)
121 (Classless Static Route)
3 (Routers)
15 (Domainname)
6 (DNS server)
12 (Host name)
119 (Domain Search)
---------------------------------------------------------------------------
TIME: 2016-05-18 18:46:39.134
IP: 10.0.0.1 (4c:5e:0c:62:4f:82) > 10.0.0.80 (00:22:5f:70:a1:df)
OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 92a34fc3
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 10.0.0.80
SIADDR: 10.0.0.1
GIADDR: 0.0.0.0
CHADDR: 00:22:5f:70:a1:df:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 2 (DHCPOFFER)
OPTION: 54 ( 4) Server identifier 10.0.0.1
OPTION: 51 ( 4) IP address leasetime 259200 (3d)
OPTION: 1 ( 4) Subnet mask 255.255.255.0
OPTION: 3 ( 4) Routers 10.0.0.1
OPTION: 6 ( 4) DNS server 10.0.0.1
---------------------------------------------------------------------------
And here's the request/offer that works (with the r299512 backed out)
---------------------------------------------------------------------------
TIME: 2016-05-18 18:35:33.817
IP: 10.0.0.220 (00:22:5f:70:a1:df) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 866cfd85
SECS: 4
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: 00:22:5f:70:a1:df:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 3 (DHCPREQUEST)
OPTION: 50 ( 4) Request IP address 10.0.0.220
OPTION: 61 ( 7) Client-identifier 01:00:22:5f:70:a1:df
OPTION: 12 ( 3) Host name zen
OPTION: 55 ( 9) Parameter Request List 1 (Subnet mask)
28 (Broadcast address)
2 (Time offset)
121 (Classless Static Route)
3 (Routers)
15 (Domainname)
6 (DNS server)
12 (Host name)
119 (Domain Search)
---------------------------------------------------------------------------
TIME: 2016-05-18 18:35:33.817
IP: 10.0.0.1 (4c:5e:0c:62:4f:82) > 10.0.0.220 (00:22:5f:70:a1:df)
OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 866cfd85
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 10.0.0.220
SIADDR: 10.0.0.1
GIADDR: 0.0.0.0
CHADDR: 00:22:5f:70:a1:df:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 5 (DHCPACK)
OPTION: 54 ( 4) Server identifier 10.0.0.1
OPTION: 51 ( 4) IP address leasetime 259200 (3d)
OPTION: 1 ( 4) Subnet mask 255.255.255.0
OPTION: 3 ( 4) Routers 10.0.0.1
OPTION: 6 ( 4) DNS server 10.0.0.1
---------------------------------------------------------------------------
--
Ian Freislich
--
Cape Augusta Digital Properties, LLC a Cape Augusta Company
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