<div dir="ltr"><div dir="ltr"><br></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 17, 2020 at 10:18 AM Александр Сандецкий <<a href="mailto:alexander.sandetsky@gmail.com">alexander.sandetsky@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi!<div><br></div><div>I have a problem with option 82 configuration.</div><div><br></div><div>I have managed switch with IP 10.10.0.38 (managed VLAN 100). There is additional VLANs configured for clients: VLAN 3000 and 3010. There is option 82 and DHCP relay configured on the switch.</div><div><br></div><div>I have DHCP server placed in VLAN 3000 with IP 172.18.0.101</div><div><br></div><div>I want to DHCP server serves the VLAN 3010 (and other) on per-VLAN basis.</div><div><br></div><div>The part of dhcpd.conf</div><div><br></div><div>class "VLAN3010" {<br> match if binary-to-ascii(10, 8, "", substring(option agent.circuit-id, 2, 2)) = "3010"<br> }<br><br><br>subnet 172.18.10.0 netmask 255.255.255.0 {<br> option routers 172.18.0.1;<br><br> pool {<br> range 172.18.10.51 172.18.10.250;<br> allow members of "VLAN3010";<br> }<br>}</div><div><br></div><div><br></div><div>The server receives request as </div><div>DHCPDISCOVER from 2c:27:d7:b1:a2:85 via <a href="http://10.10.0.38" target="_blank">10.10.0.38</a>: network <a href="http://10.10.0.0/24" target="_blank">10.10.0.0/24</a>: no free leases</div><div><br></div></div></blockquote><div> </div><div>The packet came from <a href="http://10.10.0.38/" target="_blank">10.10.0.38</a>, which is not in the subnet, so even if the class matched, it would not get an IP from that subnet.</div><div>As it says, network <a href="http://10.10.0.0/24" target="_blank">10.10.0.0/24</a> has no free leases<br></div><div><br></div><div>-- </div><div>Bob Harold</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div></div><div><br></div><div><br></div><div>I have checked with Wireshark</div><div><br></div><div> Option: (82) Agent Information Option<br> Length: 18<br> Option 82 Suboption: (1) Agent Circuit ID<br> Length: 6<br> Agent Circuit ID: 00040bc20003<br> Option 82 Suboption: (2) Agent Remote ID<br> Length: 8<br> Agent Remote ID: 00068026897b2b40</div><div><br></div><div>There is binary encoded agent circuit id that contains "0bc2" bytes that equal to "3010" in decimal.</div><div><br></div><div>Why my class definition does not accept this request? What is wrong?</div><div><br></div><div><br clear="all"><div><br></div>-- <br><div dir="ltr"><div><br></div><div>Regards,</div><div>Alexander </div></div></div></div>
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