DHCP client state if rebooted when local DHCPD server is offline?
terrygalant.lists at fastest.cc
terrygalant.lists at fastest.cc
Thu Aug 14 20:00:50 UTC 2014
Hi
On Thu, Aug 14, 2014, at 12:43 PM, Steven Carr wrote:
> Not sure if that will work if you have both fixed-address IPs in a
> shared network, it might not be able to determine which IP to give
> back to the client.
>
> What does syslog show?
At the server, on
systemctl restart dhcpd
tail -f /var/log/dhcp.log
2014-08-14T12:46:03.820177-07:00 edgerouter dhcpd[13127]: Shutting down ISC DHCPv4 4.x Server ..done
2014-08-14T12:46:04.325185-07:00 edgerouter dhcpd: Internet Systems Consortium DHCP Server 4.2.5-P1
2014-08-14T12:46:04.326389-07:00 edgerouter dhcpd: Copyright 2004-2013 Internet Systems Consortium.
2014-08-14T12:46:04.327427-07:00 edgerouter dhcpd: All rights reserved.
2014-08-14T12:46:04.328311-07:00 edgerouter dhcpd: For info, please visit https://www.isc.org/software/dhcp/
2014-08-14T12:46:04.345258-07:00 edgerouter dhcpd: Not searching LDAP since ldap-server, ldap-port and ldap-base-dn were not specified in the config file
2014-08-14T12:46:04.368366-07:00 edgerouter dhcpd: Internet Systems Consortium DHCP Server 4.2.5-P1
2014-08-14T12:46:04.369521-07:00 edgerouter dhcpd: Copyright 2004-2013 Internet Systems Consortium.
2014-08-14T12:46:04.370537-07:00 edgerouter dhcpd: All rights reserved.
2014-08-14T12:46:04.371501-07:00 edgerouter dhcpd: For info, please visit https://www.isc.org/software/dhcp/
2014-08-14T12:46:04.377301-07:00 edgerouter dhcpd: Not searching LDAP since ldap-server, ldap-port and ldap-base-dn were not specified in the config file
2014-08-14T12:46:04.378922-07:00 edgerouter dhcpd: Wrote 0 deleted host decls to leases file.
2014-08-14T12:46:04.387116-07:00 edgerouter dhcpd: Wrote 0 new dynamic host decls to leases file.
2014-08-14T12:46:04.388256-07:00 edgerouter dhcpd: Wrote 6 leases to leases file.
2014-08-14T12:46:04.422452-07:00 edgerouter dhcpd: Listening on LPF/eth1/YY:YY:YY:YY:YY:YY/home
2014-08-14T12:46:04.424346-07:00 edgerouter dhcpd: Sending on LPF/eth1/YY:YY:YY:YY:YY:YY/home
2014-08-14T12:46:04.425646-07:00 edgerouter dhcpd: Sending on Socket/fallback/fallback-net
2014-08-14T12:46:04.429356-07:00 edgerouter dhcpd[13137]: Starting ISC DHCPv4 4.x Server [chroot]..done
and when I enable DHCP & cycle the client
ifdown eth0 && ifup eth0
at the server
tail -f /var/log/dhcp.log
(nothing)
Finally, at client
dhcping -h XX:XX:XX:XX:XX:XX -s 10.16.10.1 -c 10.16.10.16
Got answer from: 10.16.10.1
at the server
tail -f /var/log/dhcp.log
2014-08-14T12:54:04.046742-07:00 edgerouter dhcpd: DHCPREQUEST for 10.16.10.16 from XX:XX:XX:XX:XX:XX via eth1
2014-08-14T12:54:04.048384-07:00 edgerouter dhcpd: DHCPACK on 10.16.10.16 to XX:XX:XX:XX:XX:XX via eth1
2014-08-14T12:54:04.049516-07:00 edgerouter dhcpd: DHCPRELEASE of 10.16.10.16 from XX:XX:XX:XX:XX:XX via eth1 (not found)
Terry
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