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  • DHCP and VLAN's

    Hi, I was just wondering how different VLANS acquire different IP addresses. I have a network with three different VLANS. Let’s call them vlan 1, 2 and 3. My DHCP server has three corresponding scopes. 10.1.x.x 10.2.x.x 10.3.x.x. How does the DHCP server know to give computers in the first VLAN the 10...
    Posted to Misc (Forum) by network on 03-14-2010

  • DHCP Clients defaulting to wrong VLAN?

    Here is the problem. We have a SuperDuperScope with two scopes in it. Both scopes are different VLAN's. VLANX and VLANY. The core Layer 3 switch that they pass through has the helper IP address of the DHCP Server. When VLANX clients try and obtain a DHCP Address it tries for 10 seconds then times...
    Posted to Misc (Forum) by network on 03-12-2010

  • Machines getting DHCP from wrong subnet

    I am in the process of separating a sister company from it's parent company. We have a 3750 that's acting as the core router/switch for the sister company's infrastructure. This 3750 is configured with a few VLANS for iSCSI/ESX/etc traffic but all the workstation and servers are in the native...
    Posted to DHCP (Forum) by network on 03-11-2010

  • DHCP and DNS address lists are out of sync

    Hi Experts, My company has managed printer accounting software operating on all our client systems. Intermittently, and seemingly without any pattern, users are being sent other user's print confirmation dialogs. When I log onto the DHCP server to investigate their DNS addresses and DHCP leases I...
    Posted to TCP/IP (Forum) by network on 03-09-2010

  • 192.162.0.0 -> "block for Provider Independent assignments"  Huh?

    Per link below, RIPE has a block of IP's starting at 192.162.0.0 for Provider Independent assignments. What does that mean? It seems like it means it's bogon IP address space. We're seeing some weird activity out of that range so I went to go look it up and nobody owns it... http://www.db...
    Posted to Misc (Forum) by network on 03-08-2010

  • SBS2003 DHCP server stopped giving ASUS notebook an IP address.

    I have an Asus A3A notebook that stopped receiving IP address from SBS2003 servers DHCP. The notebook works fine on other network (router DHCP server). All other PC's on the SBS network don't have the problem. Hope you can help.
    Posted to DHCP (Forum) by network on 03-06-2010

  • dhcp problem when apply ACL to an interface

    Hello, I have a problem that users is reporting to me they can not retrieve the IP from DHCP server which is configured on the Cisco Router 2600 after I have appliet an ACL. The config is posted below using this ACL I have applied. Router ocnfig below the line: _____________________________________________...
    Posted to Misc (Forum) by network on 03-05-2010

  • Wireless Access Point not passing DHCP request.

    Can a Wireless Access Point (Cisco Aironet 1200) block DHCP requests? I have one PC using a Dell wireless NIC. Upon startup, the PC does not receive IP address via DHCP, the computer instead defaults to the Automatic Private IP address. The DHCP server is on the local network. If I put in a static IP...
    Posted to Misc (Forum) by network on 03-03-2010

  • dhcpd dynamic dns updates from Linux and Mac OSX

    I'm using ISC's dhcpd and bind together to register dhcp client hostnames automatically in forward and reverse lookup zones in bind. When a Windows dhcp client requests an address, it's hostname is successfully registered as an A record and it's IP address is successfully registered as...
    Posted to Misc (Forum) by network on 03-03-2010

  • Strange MAC address in DHCP table????

    I have a home network with 5 machines. I also have a DSL connection with 2 router/firewalls between my internal network and my ISP. The Edge router is a ZOOM 3X series Modem/Router which gets its external IP from the ISP. The second Router is a DLink DI-624 Airplus X-treme wireless router. The Dlink...
    Posted to Misc (Forum) by network on 03-01-2010
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