I have network 192.168.1.0 with a dhcp server (windows)VLAN 10 I also have network 172.32.1.0 with dhcp server (cisco) VLAN 30 I just set a port on the router(3750) that lives on both networks to to be on VLAN 30 and plugged it into a switch on VLAN 10 so my laptops with a static IP can get to their default gateway on vlan 30.

To add a new IP address block, range, or address, click IPv4 or IPv6 in the lower navigation pane, click TASKS, and then click Add IP Address [Range/Block]. To edit existing address space, right-click the unit of address space (address, range, or block) and then click Edit IP Address [Range/Block]. I'd setup a packet capture to look for DHCP traffic and see if there's actually another DHCP server on the network. It's quite easy to manually assign an IP address if you have the subnet and default route info which is easily extracted from any Windows machine. User has a personal laptop, phone, etc., they want connected to the network? Just assign a static IP on the correct subnet and you're From what I now understand STP is the problem, the switch is blocking the DHCP request while it checks for a loop and the PC misses its dynamic IP while Windows boots. The DHCP client connects after Windows boots, but this misses the initial Group Policy load and possible the user profile load depending on how quick the user's fingers are The desired functionality is the ability to block all traffic to and from a given device. Currently, we are doing this using bridge link set dev state 0, which sets the bridge state of the device to "disabled". However, this appears to also block DHCP traffic from the device. The network's DHCP server is accessible via the external Hi, as i mentioned, i configured DHCP snooping and its worked to block DHCP ACKs from rougue DHCP server. However, another problem arose. I have a ghost server and due a VLAN based structure, I have mentioned the ghost server's IP add as 'ip helper-address'. What I'm trying to do is block DHCP requests (DISCOVER/REQUEST; UDP 68 to 67) packets going from one client to another and/or the replies (OFFER/ACK; UDP 67 to 68). This is to protect against rogue DHCP servers, as part of a general clampdown on DoS (intentional or otherwise) between clients. 20/03/2009 · Blocking rogue DHCP servers. The reader who was concerned about making a loop while connecting a switch to itself was also facing “customer-installed” DHCP servers in his LAN. He wrote: Some users have installed their own Linksys routers and plug our

hi guys, I have the following situation and need only provide dhcp wireless network, wired network uses static IP addresses, but set in the AP DHCP propagates a concession to the wired network switch. I need block DHCP offer in the access ports in Switch I can not create more VLANs, as requested.

I'd setup a packet capture to look for DHCP traffic and see if there's actually another DHCP server on the network. It's quite easy to manually assign an IP address if you have the subnet and default route info which is easily extracted from any Windows machine. User has a personal laptop, phone, etc., they want connected to the network? Just assign a static IP on the correct subnet and you're From what I now understand STP is the problem, the switch is blocking the DHCP request while it checks for a loop and the PC misses its dynamic IP while Windows boots. The DHCP client connects after Windows boots, but this misses the initial Group Policy load and possible the user profile load depending on how quick the user's fingers are

Yet again windows firewall is blocking essential stuff without ever giving you a notice, making you disable it and be less secure. This time it is the Wifi network of my Android device. Please help me dear microsoft locate where did I ever configure that the dhcp traffic should be blocked?!

hi guys, I have the following situation and need only provide dhcp wireless network, wired network uses static IP addresses, but set in the AP DHCP propagates a concession to the wired network switch. I need block DHCP offer in the access ports in Switch I can not create more VLANs, as requested. 11/07/2006 · Create a New User or Vendor Option Class. Start DHCP Manager. In the console tree, click the applicable DHCP server branch. Right-click the server, and then click Define User Classes to create a