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Today's Topics:
1. Re: dhcpd.conf fails to push options to fixed-address clients
(Kenneth Porter)
----------------------------------------------------------------------
Message: 1
Date: Wed, 23 Feb 2022 00:07:33 -0800
From: Kenneth Porter <sh...@sewingwitch.com>
To: dhcp-users@lists.isc.org
Subject: Re: dhcpd.conf fails to push options to fixed-address clients
Message-ID: <f8d3f2f1-1b20-182f-b55b-d28102cbb...@sewingwitch.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
New info:
There seems to be an issue with the options not fitting in the packet,
because I had declared a filename for booting. I commented that out and
now I'm seeing more options packed into the packet, including the lease
time, netmask, gateway, and NTP server. But the device is still
repeatedly sending requests every 30 seconds, ignoring the configured
lease time. That's a bug for TP-Link to deal with.
23:53:29.131968 IP (tos 0x0, ttl 64, id 60348, offset 0, flags [DF],
proto UDP (17), length 399)
??? 10.96.0.250.bootpc > orifice.lsi.lan.bootps: [udp sum ok]
BOOTP/DHCP, Request from 60:32:b1:a6:be:ac (oui Unknown), length 371,
????????? Client-IP 10.96.0.250
????????? Client-Ethernet-Address 60:32:b1:a6:be:ac (oui Unknown)
????????? Vendor-rfc1048 Extensions
??????????? Magic Cookie 0x63825363
??????????? DHCP-Message Option 53, length 1: Request
??????????? Client-ID Option 61, length 7: ether 60:32:b1:a6:be:ac
??????????? MSZ Option 57, length 2: 1024
??????????? Parameter-Request Option 55, length 10:
????????????? Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname
????????????? Domain-Name, BR, Static-Route, NTP
????????????? Classless-Static-Route, Classless-Static-Route-Microsoft
??????????? Vendor-Class Option 60, length 8: "MSFT 5.0"
??????????? Hostname Option 12, length 10: "ArcherAX20"
23:53:29.132550 IP (tos 0x0, ttl 64, id 16120, offset 0, flags [DF],
proto UDP (17), length 328)
??? orifice.lsi.lan.bootps > 10.96.0.250.bootpc: [bad udp cksum 0x1783
-> 0x88e4!] BOOTP/DHCP, Reply, length 300, xid 0x28a89f4f, Fl
????????? Client-IP 10.96.0.250
????????? Your-IP 10.96.0.250
????????? Server-IP orifice.lsi.lan
????????? Client-Ethernet-Address 60:32:b1:a6:be:ac (oui Unknown)
????????? Vendor-rfc1048 Extensions
??????????? Magic Cookie 0x63825363
??????????? DHCP-Message Option 53, length 1: ACK
??????????? Server-ID Option 54, length 4: orifice.lsi.lan
??????????? Lease-Time Option 51, length 4: 259200
??????????? Subnet-Mask Option 1, length 4: 255.255.0.0
??????????? Default-Gateway Option 3, length 4: zyxel.lsi.lan
??????????? Domain-Name-Server Option 6, length 8:
rocinante.lsi.lan,orifice.lsi.lan
??????????? Domain-Name Option 15, length 7: "lsi.lan"
??????????? NTP Option 42, length 8: rocinante.lsi.lan,orifice.lsi.lan
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