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Today's Topics:
1. ISC DHCP 4.4.1_CentOS7_DHCPv6_Relay_server: issue related
with Class matching option along with condition.
(PaviGuru Pavithragurumurthy)
----------------------------------------------------------------------
Message: 1
Date: Tue, 6 Nov 2018 21:32:32 +0530
From: PaviGuru Pavithragurumurthy <gurumurth...@gmail.com>
To: dhcp-users@lists.isc.org
Subject: ISC DHCP 4.4.1_CentOS7_DHCPv6_Relay_server: issue related
with Class matching option along with condition.
Message-ID:
<CANNSsC6H8epbP=5eneufohdxnrldedfcuucprpjkxar5c-b...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hello Team,
I am working on a problem with my ISC DCHP Version 4.4 server for IPv6
from last few days, But I could not found a solution or root cause. So
I hope someone could help me.
Problem : server not responding with IP details for relay request with
selection of class option [ option 18].
It works fine when we comment out on class condition.
>From wireshark print, This interface id will inserted by an relay agent [
?TESTING;?].
Please guide us how to collect debug logs with debug enable or any
configuration error or installation steps. Platform is Centos7.
Configuration file
[root@localhost dhcp]# cat dhcpd6.conf
#
# DHCPv6 Server Configuration file.
# see /usr/share/doc/dhcp*/dhcpd6.conf.example
# see dhcpd.conf(5) man page
authoritative;
default-lease-time 86400;
max-lease-time 86400;
allow leasequery;
log-facility local7;
class "team" {
match if substring (option dhcp6.interface-id, 0, 8) = "TESTING;";
}
subnet6 3001:db8:100:f101::0/64 {
pool6 {
log(info, option dhcp6.interface-id);
range6 3001:db8:100:f101::0:100 3001:db8:100:f101::0:1FF;
allow members of "team";
}
}
[root@localhost dhcp]#
[root@localhost /]# /usr/local/sbin/dhcpd -6 -d -lf /var/db/dhcp.leases -cf
/etc/dhcp/dhcpd6.conf eno1
Internet Systems Consortium DHCP Server 4.4.1
Copyright 2004-2018 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Config file: /etc/dhcp/dhcpd6.conf
Database file: /var/db/dhcp.leases
PID file: /var/run/dhcpd6.pid
Wrote 0 class decls to leases file.
Wrote 0 NA, 0 TA, 0 PD leases to lease file.
Bound to *:547
Listening on Socket/5/eno1/3001:db8:100:f101::/64
Sending on Socket/5/eno1/3001:db8:100:f101::/64
Server starting service.
Relay-forward message from 3001:db8:100:f101:62a8:feff:feab:5500 port 547,
link address 3001:db8:100:f101:62a8:feff:feab:5500, peer address
fe80::208:2ff:fe01:1
*Unable to pick client address: no addresses available* - shared network
3001:db8:100:f101::/64: 0 total, 0 active, 0 abandoned
Sending Relay-reply to 3001:db8:100:f101:62a8:feff:feab:5500 port 547
Relay-forward message from 3001:db8:100:f101:62a8:feff:feab:5500 port 547,
link address 3001:db8:100:f101:62a8:feff:feab:5500, peer address
fe80::208:2ff:fe01:1
*Unable to pick client address: no addresses available* - shared network
3001:db8:100:f101::/64: 0 total, 0 active, 0 abandoned
Sending Relay-reply to 3001:db8:100:f101:62a8:feff:feab:5500 port 547
Wireshark Logs attached:
Let us know any further information required, we are doing first time with
IPv6. IPv4 is fine and class options are working.
Thanks
Guru
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