[Dnsmasq-discuss] address assignment without checking context?
Stueckjuergen Christoph
christoph.stueckjuergen at siemens.com
Mon Aug 1 17:08:11 BST 2005
> The netmask problem needs fixing before we can say that this approach
> won't work, I think.
Thanks for the hint. We fixed this now, but still did not manage to get the
desired behavior (see log). It seems that dnsmasq only uses the most recently
assigned ip address of an interface for context checking and ignores the
other addresses. Beyond that, we need a means of routing packets for
dedicated subnets to dedicated interfaces. When assigning both addresses to
both interfaces, it turns out that routing is somewhat undefined. I feel like
patching dnsmasq so that packets with client id are answered on each
interface regardless of their context might be the easier way to go.
Christoph
linux:/opt/dnsmasq # ./dnsmasq -C ./dnsmasq.conf -d
dnsmasq: started, version 2.22 cachesize 180
dnsmasq: DHCP, static leases only on 10.128.150.10, lease time 45m
dnsmasq: DHCP, static leases only on 10.0.150.10, lease time 45m
dnsmasq: DHCP, static leases only on 10.64.150.10, lease time 45m
dnsmasq: read /etc/hosts - 93 addresses
dnsmasq: reading /opt/dnsmasq/resolv.conf
dnsmasq: DHCPDISCOVER(eth0) 10.0.150.10 00:01:02:dd:4b:74 no address available
dnsmasq: DHCPDISCOVER(eth1) 10.0.150.10 00:01:02:dd:4b:74
dnsmasq: DHCPOFFER(eth1) 10.0.150.32 00:01:02:dd:4b:74
dnsmasq: DHCPREQUEST(eth1) 10.0.150.32 00:01:02:dd:4b:74
dnsmasq: DHCPACK(eth1) 10.0.150.32 00:01:02:dd:4b:74 INT0_IOD_MB_BAS0_MAS
dnsmasq: DHCPDISCOVER(eth0) 10.0.150.10 00:01:02:dd:4b:74 no address available
dnsmasq: DHCPDISCOVER(eth1) 10.0.150.10 00:01:02:dd:4b:74
dnsmasq: DHCPOFFER(eth1) 10.0.150.33 00:01:02:dd:4b:74
dnsmasq: DHCPREQUEST(eth1) 10.0.150.33 00:01:02:dd:4b:74
dnsmasq: DHCPACK(eth1) 10.0.150.33 00:01:02:dd:4b:74 INT0_IOD_MB_BAS0_SLV
dnsmasq: DHCPDISCOVER(eth0) 10.0.150.10 00:01:02:dd:4b:74 no address available
dnsmasq: DHCPDISCOVER(eth1) 10.0.150.10 00:01:02:dd:4b:74
dnsmasq: DHCPOFFER(eth1) 10.0.150.34 00:01:02:dd:4b:74
dnsmasq: DHCPREQUEST(eth1) 10.0.150.34 00:01:02:dd:4b:74
dnsmasq: DHCPACK(eth1) 10.0.150.34 00:01:02:dd:4b:74 INT0_IOD_MB_EXT0_MAS
dnsmasq: DHCPDISCOVER(eth0) 10.0.150.10 00:01:02:dd:4b:74 no address available
dnsmasq: DHCPDISCOVER(eth1) 10.0.150.10 00:01:02:dd:4b:74
dnsmasq: DHCPOFFER(eth1) 10.0.150.35 00:01:02:dd:4b:74
dnsmasq: DHCPREQUEST(eth1) 10.0.150.35 00:01:02:dd:4b:74
dnsmasq: DHCPACK(eth1) 10.0.150.35 00:01:02:dd:4b:74 INT0_IOD_MB_EXT0_SLV
dnsmasq: DHCPDISCOVER(eth0) 10.128.150.10 00:10:5a:5a:05:e2
dnsmasq: DHCPOFFER(eth0) 10.128.150.32 00:10:5a:5a:05:e2
dnsmasq: DHCPDISCOVER(eth1) 10.128.150.10 00:10:5a:5a:05:e2 no address
available
dnsmasq: DHCPREQUEST(eth0) 10.128.150.32 00:10:5a:5a:05:e2
dnsmasq: DHCPACK(eth0) 10.128.150.32 00:10:5a:5a:05:e2 INT1_IOD_MB_BAS0_MAS
dnsmasq: DHCPDISCOVER(eth0) 10.128.150.10 00:10:5a:5a:05:e2
dnsmasq: DHCPOFFER(eth0) 10.128.150.33 00:10:5a:5a:05:e2
dnsmasq: DHCPDISCOVER(eth1) 10.128.150.10 00:10:5a:5a:05:e2 no address
available
dnsmasq: DHCPREQUEST(eth0) 10.128.150.33 00:10:5a:5a:05:e2
dnsmasq: DHCPACK(eth0) 10.128.150.33 00:10:5a:5a:05:e2 INT1_IOD_MB_BAS0_SLV
dnsmasq: DHCPDISCOVER(eth0) 10.128.150.10 00:10:5a:5a:05:e2
dnsmasq: DHCPOFFER(eth0) 10.128.150.34 00:10:5a:5a:05:e2
dnsmasq: DHCPDISCOVER(eth1) 10.128.150.10 00:10:5a:5a:05:e2 no address
available
dnsmasq: DHCPREQUEST(eth0) 10.128.150.34 00:10:5a:5a:05:e2
dnsmasq: DHCPACK(eth0) 10.128.150.34 00:10:5a:5a:05:e2 INT1_IOD_MB_EXT0_MAS
dnsmasq: DHCPDISCOVER(eth0) 10.128.150.10 00:10:5a:5a:05:e2
dnsmasq: DHCPOFFER(eth0) 10.128.150.35 00:10:5a:5a:05:e2
dnsmasq: DHCPDISCOVER(eth1) 10.128.150.10 00:10:5a:5a:05:e2 no address
available
dnsmasq: DHCPREQUEST(eth0) 10.128.150.35 00:10:5a:5a:05:e2
dnsmasq: DHCPACK(eth0) 10.128.150.35 00:10:5a:5a:05:e2 INT1_IOD_MB_EXT0_SLV
linux:/opt/dnsmasq # ip addr show
1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 brd 127.255.255.255 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:01:02:dd:84:bc brd ff:ff:ff:ff:ff:ff
inet 10.0.150.111/15 brd 10.1.255.255 scope global eth0
inet 10.128.150.111/15 brd 10.129.255.255 scope global eth0
inet6 fe80::201:2ff:fedd:84bc/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:50:da:48:d1:fe brd ff:ff:ff:ff:ff:ff
inet 10.128.150.111/15 brd 10.129.255.255 scope global eth1
inet 10.0.150.111/15 brd 10.1.255.255 scope global eth1
inet6 fe80::250:daff:fe48:d1fe/64 scope link
valid_lft forever preferred_lft forever
4: sit0: <NOARP> mtu 1480 qdisc noqueue
link/sit 0.0.0.0 brd 0.0.0.0
linux:/opt/dnsmasq # ip route show
169.254.0.0/16 dev eth0 scope link
10.0.0.0/15 dev eth0 proto kernel scope link src 10.0.150.111
10.0.0.0/15 dev eth1 proto kernel scope link src 10.0.150.111
10.128.0.0/15 dev eth1 proto kernel scope link src 10.128.150.111
10.128.0.0/15 dev eth0 proto kernel scope link src 10.128.150.111
127.0.0.0/8 dev lo scope link
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