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<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Hi experts,<br>
<br>
I am trying to provide dynamic IP addresses for devices that are resided on VLAN
101. The server is currently providing 172.17.x.x/16 range for its own VLAN 417.
My server is RHEL4 running DHCPD version 3.0.1. The core switch (Cisco 3750) is
configured with “ip helper-address 172.17.1.1” on VLAN 101 interface.
Here is my dhcpd.conf file:<br>
<br>
authoritative;<br>
ddns-update-style ad-hoc;<br>
omapi-port 7911;<br>
<br>
shared-network eth1<br>
{<br>
option domain-name "globalsuite.net";<br>
option domain-name-servers 4.2.2.1;<br>
default-lease-time 88200;<br>
max-lease-time 88200;<br>
<br>
subnet 172.17.0.0 netmask 255.255.0.0<br>
{<br>
range 172.17.1.10 172.17.199.254;<br>
option broadcast-address 172.17.255.255;<br>
option routers 172.17.1.1;<br>
option subnet-mask 255.255.0.0;<br>
}<br>
<br>
subnet 192.168.1.0 netmask 255.255.255.0<br>
{<br>
range 192.168.1.10 192.168.1.250;<br>
option broadcast-address 192.168.1.255;<br>
option routers 192.168.1.254;<br>
option subnet-mask 255.255.255.0;<br>
}<br>
}<br>
<br>
Here is my eth1:<br>
[root@NE_<st1:PersonName w:st="on">OVI</st1:PersonName> ~]# ifconfig eth1<br>
eth1 Link encap:Ethernet HWaddr 00:15:C5:F4:CB:22<br>
inet addr:172.17.1.1 Bcast:172.17.255.255 Mask:255.255.0.0<br>
<br>
Here is my routing table on the server. The eth0 is WAN interface, connected
with ISP. The eth1 is LAN interface on VLAN 101. The server is also doing
NAT/PAT for the LAN users.<br>
<br>
[root@NE_<st1:PersonName w:st="on">OVI</st1:PersonName> ~]# route -n<br>
Kernel IP routing table<br>
Destination Gateway
Genmask
Flags
Metric Ref Use Iface<br>
210.83.99.128 0.0.0.0 255.255.255.128
U 0 0 0 eth0<br>
192.168.1.0 172.17.254.1
255.255.255.0 UG
0 0 0 eth1<br>
0.0.0.0 210.83.99.129
0.0.0.0 UG
0 0 0 eth0<br>
<br>
Configs on the switch:<br>
!<br>
interface Vlan417<br>
ip address 172.17.254.1 255.255.0.0<br>
no ip route-cache<br>
end<br>
!<br>
interface Vlan101<br>
ip address 192.168.1.254 255.255.255.0<br>
ip helper-address 172.17.1.1<br>
end<br>
!<br>
<br>
However my laptop on the VLAN 101 keeps getting IP of 172.17.x.x/16 range... Here
is the log.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Jun 8 11:53:47
NE_<st1:PersonName w:st="on">OVI</st1:PersonName> dhcpd: DHCPDISCOVER from
00:11:43:fe:80:19 (ne-l-d400tester) via 192.168.1.254<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Jun 8 11:53:47
NE_<st1:PersonName w:st="on">OVI</st1:PersonName> dhcpd: DHCPOFFER on
172.17.199.253 to 00:11:43:fe:80:19 (ne-l-d400tester) via 192.168.1.254<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Jun 8 11:53:47
NE_<st1:PersonName w:st="on">OVI</st1:PersonName> dhcpd: if ne-l-d400tester.globalsuite.net
IN A rrset doesn't exist add ne-l-d400tester.globalsuite.net 44100 IN A
172.17.199.253: timed out.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Jun 8 11:53:47
NE_<st1:PersonName w:st="on">OVI</st1:PersonName> dhcpd: DHCPREQUEST for
172.17.199.253 (172.17.1.1) from 00:11:43:fe:80:19 (ne-l-d400tester) via
192.168.1.254<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Jun 8 11:53:47
NE_<st1:PersonName w:st="on">OVI</st1:PersonName> dhcpd: DHCPACK on
172.17.199.253 to 00:11:43:fe:80:19 (ne-l-d400tester) via 192.168.1.254<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Where do I do wrong?
How do I fix it?<br>
<br>
Thanks!</span></font><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span></font></p>
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