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To subscribe or unsubscribe via the World Wide Web, visit https://lists.isc.org/mailman/listinfo/dhcp-users or, via email, send a message with subject or body 'help' to dhcp-users-requ...@lists.isc.org You can reach the person managing the list at dhcp-users-ow...@lists.isc.org When replying, please edit your Subject line so it is more specific than "Re: Contents of dhcp-users digest..." Today's Topics: 1. Re: New IP address after each reboot (Jean-Philippe Martin) ---------------------------------------------------------------------- Message: 1 Date: Tue, 26 Apr 2022 09:33:56 +0200 From: Jean-Philippe Martin <jpmar...@studiohari.com> To: Users of ISC DHCP <dhcp-users@lists.isc.org> Subject: Re: New IP address after each reboot Message-ID: <caoxu5eonlggpwnmvbxka60a3qvsammwlg8-cnsjizysvviu...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Hi Glenn i don't use random mac addresses. We used ISC DHCP in the past and this work well with lease and reservation on hwaddr. Kea permit a simplest management (with REST) and a simple way for high availability. We have make module in saltstack (i will push it in github when i have finish the kea formula) Le mar. 26 avr. 2022 ? 01:52, Glenn Satchell <glenn.satch...@uniq.com.au> a ?crit : > Hi Jean-Philippe > > Are your clients using random mac addresses? if so then each time they > reboot they get a different mac address, and to the server it looks like > a new client. My guess is the client-id stays the same? Can you use the > client ID in the reservation setup rather than hwaddr? > > regards, > > Glenn > > On 2022-04-26 08:21, Jean-Philippe Martin wrote: > > > Hi > > > > We use kea 2.01 (lease and reservation in mysql) > > > > I have exactly this problem : > > > > if i use a subnet with "match-client-id": false > > > > my reservation (identifier is hwaddr) work but other lease is a newer > > ip at each reboot > > > > If i use a subnet with "match-client-id": true > > > > lease d'ont be reset at boot but reservation don't work any more > > > > best regards > > > > _________________________________________ > > Hi Anton, > > > > Have you considered dropping the DHCPRELEASE packets instead? > > > > You can read how this could be done in Gitlab #606 "Drop packets in > > DROP class" at https://gitlab.isc.org/isc-projects/kea/-/issues/606 > > > > Please refer to the Kea Arm for a discussion on the "DROP" class. > > > > Kind Regards Peter > > > > ________________________________ > > From: Kea-users <kea-users-bounces at lists.isc.org> on behalf of Anton > > Starikov <starikov.a at tecomgroup.ru> > > Sent: 18 October 2020 19:02 > > To: kea-users at lists.isc.org <kea-users at lists.isc.org> > > Subject: [Kea-users] New IP address after each reboot > > > > Good afternoon! > > > > Sorry for my english. > > > > There is a problem with Kea Dhcp4 1.6.3 (1.8 is the same). > > > > After each reboot, the client (Ubuntu, Arch) gets a new ip address from > > KeaDhcp. As I understand it, this is due to the fact that Kea, after > > receiving DHCPRELEASE from the client, does not immediately release the > > address (although it adds a line with expire = 0 to the > > lease-database), but does it after a while. > > > > As an experiment, I limited the address pool to two ip. And with each > > reboot (interval ~ 20 seconds), the client received different addresses > > in a circle. > > > > Previously, Mikrotik was used as DHCP, there was no such problem. The > > client rebooted and, if the address was still free, he received it > > back. > > > > Is there any way to force Kea to immediately release such addresses? > > > > I tried to change the settings described in the documentation in > > section "10. Lease Expiration", it didn't help. > > > > { > > > > "Dhcp4": { > > > > "loggers": [ > > > > { > > > > "name": "kea-dhcp4", > > > > "output_options": [ > > > > { > > > > "output": "/var/log/kea-debug.log", > > > > "maxver": 8, > > > > "maxsize": 204800, > > > > "flush": true, > > > > "pattern": "%d{%j %H:%M:%S.%q} %c %m\n" > > > > } > > > > ], > > > > "severity": "DEBUG", > > > > "debuglevel": 99 > > > > }, > > > > { > > > > "name": "kea-dhcp4.commands", > > > > "output_options": [ > > > > { > > > > "output": "syslog" > > > > } > > > > ], > > > > "severity": "DEBUG", > > > > "debuglevel": 99 > > > > }, > > > > { > > > > "name": "kea-dhcp4.http", > > > > "output_options": [ > > > > { > > > > "output": "syslog" > > > > } > > > > ], > > > > "severity": "DEBUG", > > > > "debuglevel": 99 > > > > }, > > > > { > > > > "name": "kea-dhcp4.callouts", > > > > "output_options": [ > > > > { > > > > "output": "syslog" > > > > } > > > > ], > > > > "severity": "DEBUG", > > > > "debuglevel": 99 > > > > }], > > > > "authoritative": false, > > > > "boot-file-name": "", > > > > "calculate-tee-times": true, > > > > "client-classes": [ > > > > { > > > > "boot-file-name": "", > > > > "name": "pxe", > > > > "next-server": "10.0.0.12", > > > > "only-if-required": true, > > > > "option-data": [ > > > > { > > > > "always-send": false, > > > > "code": 66, > > > > "csv-format": true, > > > > "data": "10.0.0.12", > > > > "name": "tftp-server-name", > > > > "space": "dhcp4" > > > > }, > > > > { > > > > "always-send": false, > > > > "code": 67, > > > > "csv-format": true, > > > > "data": "grldr", > > > > "name": "boot-file-name", > > > > "space": "dhcp4" > > > > } > > > > ], > > > > "option-def": [ ], > > > > "server-hostname": "", > > > > "test": "member('ALL')" > > > > }, > > > > { > > > > "boot-file-name": "", > > > > "name": "voip", > > > > "next-server": "10.0.0.10", > > > > "only-if-required": true, > > > > "option-data": [ > > > > { > > > > "always-send": false, > > > > "code": 66, > > > > "csv-format": true, > > > > "data": "10.0.0.10", > > > > "name": "tftp-server-name", > > > > "space": "dhcp4" > > > > }, > > > > { > > > > "always-send": false, > > > > "code": 67, > > > > "csv-format": true, > > > > "data": "grldr1", > > > > "name": "boot-file-name", > > > > "space": "dhcp4" > > > > } > > > > ], > > > > "option-def": [ ], > > > > "server-hostname": "", > > > > "test": "member('ALL')" > > > > } > > > > ], > > > > "control-socket": { > > > > "socket-name": "/tmp/kea-dhcp4-ctrl.sock", > > > > "socket-type": "unix" > > > > }, > > > > "decline-probation-period": 86400, > > > > "dhcp-ddns": { > > > > "enable-updates": false, > > > > "generated-prefix": "myhost", > > > > "max-queue-size": 1024, > > > > "ncr-format": "JSON", > > > > "ncr-protocol": "UDP", > > > > "override-client-update": false, > > > > "override-no-update": false, > > > > "qualifying-suffix": "", > > > > "replace-client-name": "never", > > > > "sender-ip": "0.0.0.0", > > > > "sender-port": 0, > > > > "server-ip": "127.0.0.1", > > > > "server-port": 53001 > > > > }, > > > > "dhcp-queue-control": { > > > > "capacity": 500, > > > > "enable-queue": false, > > > > "queue-type": "kea-ring4" > > > > }, > > > > "dhcp4o6-port": 0, > > > > "echo-client-id": true, > > > > "expired-leases-processing": { > > > > "flush-reclaimed-timer-wait-time": 5, > > > > "hold-reclaimed-time": 1800, > > > > "max-reclaim-leases": 100, > > > > "max-reclaim-time": 250, > > > > "reclaim-timer-wait-time": 10, > > > > "unwarned-reclaim-cycles": 5 > > > > }, > > > > "hooks-libraries": [ > > > > { > > > > "library": "/usr/lib/x86_64-linux-gnu/kea/hooks/libdhcp_lease_cmds.so" > > > > } > > > > ], > > > > "host-reservation-identifiers": [ "hw-address"], > > > > "interfaces-config": { > > > > "interfaces": [ "*" ], > > > > "re-detect": true > > > > }, > > > > "lease-database": { > > > > "name": "/var/lib/kea/dhcp4.leases", > > > > "persist": true, > > > > "type": "memfile" > > > > }, > > > > "match-client-id": false, > > > > "next-server": "0.0.0.0", > > > > "option-data": [ > > > > { > > > > "always-send": false, > > > > "code": 6, > > > > "csv-format": true, > > > > "data": "10.0.0.1", > > > > "name": "domain-name-servers", > > > > "space": "dhcp4" > > > > }, > > > > { > > > > "always-send": false, > > > > "code": 15, > > > > "csv-format": true, > > > > "data": "lab.winitlab.com", > > > > "name": "domain-name", > > > > "space": "dhcp4" > > > > }, > > > > { > > > > "always-send": false, > > > > "code": 119, > > > > "csv-format": false, > > > > "data": "057465636F6D046E6E6F76027275000A7465636F6D67726F757002727500", > > > > "name": "domain-search", > > > > "space": "dhcp4" > > > > } > > > > ], > > > > "option-def": [ ], > > > > "t1-percent": 0.5, > > > > "t2-percent": 0.875, > > > > "reservation-mode": "all", > > > > "sanity-checks": { > > > > "lease-checks": "warn" > > > > }, > > > > "server-hostname": "", > > > > "server-tag": "", > > > > "shared-networks": [ ], > > > > "subnet4": [ > > > > { > > > > "4o6-interface": "", > > > > "4o6-interface-id": "", > > > > "4o6-subnet": "", > > > > "authoritative": false, > > > > "calculate-tee-times": true, > > > > "id": 18, > > > > "match-client-id": false, > > > > "next-server": "1.1.1.1", > > > > "option-data": [ > > > > { > > > > "always-send": false, > > > > "code": 3, > > > > "csv-format": true, > > > > "data": "10.0.50.1", > > > > "name": "routers", > > > > "space": "dhcp4" > > > > }, > > > > { > > > > "always-send": false, > > > > "code": 6, > > > > "csv-format": true, > > > > "data": "10.200.0.1", > > > > "name": "domain-name-servers", > > > > "space": "dhcp4" > > > > }, > > > > { > > > > "always-send": false, > > > > "code": 15, > > > > "csv-format": true, > > > > "data": "bncvbn.nnn", > > > > "name": "domain-name", > > > > "space": "dhcp4" > > > > } > > > > ], > > > > "pools": [ > > > > { > > > > "option-data": [ ], > > > > "pool": "10.0.50.10-10.0.50.80" > > > > } > > > > ], > > > > "relay": { > > > > "ip-addresses": [ "10.0.50.1" ] > > > > }, > > > > "reservation-mode": "all", > > > > "reservations": [], > > > > "subnet": "10.0.50.0/24", > > > > "t1-percent": 0.5, > > > > "t2-percent": 0.875, > > > > "valid-lifetime": 86400 > > > > } > > > > ], > > > > "t1-percent": 0.5, > > > > "t2-percent": 0.875, > > > > "valid-lifetime": 4000 > > > > } > > > > } > > > > -- > > > > _______________________ > -- > ISC funds the development of this software with paid support > subscriptions. Contact us at https://www.isc.org/contact/ for more > information. > > dhcp-users mailing list > dhcp-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/dhcp-users > -- _______________________ -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20220426/71f83601/attachment.htm> ------------------------------ Subject: Digest Footer _______________________________________________ ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. dhcp-users mailing list dhcp-users@lists.isc.org https://lists.isc.org/mailman/listinfo/dhcp-users ------------------------------ End of dhcp-users Digest, Vol 162, Issue 10 *******************************************