<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_1_1445954333556_7090"><span id="yui_3_16_0_1_1445954333556_7201">Hello Experts,</span></div><div id="yui_3_16_0_1_1445954333556_7090"><span id="yui_3_16_0_1_1445954333556_7298">We have configured the DHCP Server using ISC DHCP server version 4.1 on CentOS. The server deployment remain successful and most of the host are acquiring IP address normally. On of the host is successfully acquiring IP but not the default gateway which is defined in the server as "option routers" parameter under dhcp scope.</span></div><div id="yui_3_16_0_1_1445954333556_7090"><span><br></span></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr"><span id="yui_3_16_0_1_1445954333556_7301">I have tried to compare the message of working host with that of problematic one the following differences I have found:</span></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr"><span><br></span></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr"><span id="yui_3_16_0_1_1445954333556_7358">1- Message Size parameter is sent by the problematic client which is a modem Gigaset SX686</span></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr"><span id="yui_3_16_0_1_1445954333556_7376">2- All the messages are same on both problematic client and normal client </span></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr"><span id="yui_3_16_0_1_1445954333556_7377">3- DHCP is successfully leasing the IP</span></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr"><span><br></span></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr"><span id="yui_3_16_0_1_1445954333556_7527">I have tried hit and trials but no success. The server is operating with default parameters. Can someone please suggest.</span></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr"><span><br></span></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7712"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7711"># see 'man 5 dhcpd.conf'</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b><font color="#9d1811">#</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b><font color="#9d1811">ddns-update-style none;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b><font color="#9d1811">authoritative;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7756"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7755">one-lease-per-client true;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b><font color="#9d1811">log-facility local0;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7758"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7757">default-lease-time 600;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7760"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7759">max-lease-time 600;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7762"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7761">get-lease-hostnames false;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7764"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7763"># parameters for LAN<br></font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7709"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7708"> subnet 10.0.0.0 netmask 255.255.255.0 {</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7725"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7724"> option routers 10.0.0.1, 10.0.0.2;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7727"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7726"> option subnet-mask 255.255.255.0;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7729"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7728"> option broadcast-address 10.0.0.255;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7740"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7739"> option domain-name-servers 10.0.0.3, 8.8.8.8;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7731"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7730"> option interface-mtu 1500;</font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7733"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7732"> range 10.0.0.4 10.0.0.254;<br></font></b></div><div id="yui_3_16_0_1_1445954333556_7090" dir="ltr" class=""><b id="yui_3_16_0_1_1445954333556_7716"><font color="#9d1811" id="yui_3_16_0_1_1445954333556_7715">}</font></b><br></div><div></div><div id="yui_3_16_0_1_1445954333556_7091"> </div><div class="signature" id="yui_3_16_0_1_1445954333556_7092">Regards,
Muhammad Faisal.</div></div></body></html>