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It appears to require a "bridged" adapter, which then lets you select the type of network card under the "advanced" settings. If you install the vbox extension pack then you can use an Intel network card to PXE boot. Other network adapters seem to PXE boot as well, probably without needing the extensions installed. The Intel card seems to be best ...


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How about create a new scope, or you can configure the lease time for ip address.


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If you disable ddns update-optimization, it should remove the records when the lease ages out. [1] 1: https://kb.isc.org/article/AA-01091/0/ISC-DHCP-support-for-Standard-DDNS.html


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DHCPv6 has many features not present in SLAAC. Most of those features are rarely needed. There is however one DHCPv6 feature, which would be useful in many cases. That is prefix delegation. If you are a network administrator at an ISP, that one feature may be enough for you to make it worthwhile to deploy a DHCPv6 server. If you are not working for an ISP, ...


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You want DHCPv6 if the network administrator should have control over who gets (which) IPv6 addresses, e.g. because they need to be in sync with AAAA DNS records, or if you don't want to tell the outside your MAC addresses (i.e. what hardware vendors you use), but don't want to use privacy extensions either, e.g. to still use permanent IPv6 addresses, or ...


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It's possble that your ISP's device doesn't give DHCP addresses to a MAC address which is not directly connected to it. You'd need to call your ISP to confirm this. If so, you could use ebtables to spoof the MAC of the VM, like this: http://wiki.debian.org/BridgeNetworkConnections


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The error message peer holds all free leases can also mean that the request has been received on the wrong network interface, e.g. if a computer is only configured to get an IP on eth0, but the DHCP request is received on eth1. deny dynamic bootp clients is typical for such a setup. In my case one interface was for the workstation network and the other one ...


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Strictly speaking, yes. The client hardware address is a data field that will be in both the DHCPDISCOVER message (which won't leave the LAN) and the DHCPREQUEST message, which will be relayed by the relay agent. Why do you ask?


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OSX 10.9 does support it. Windows 7 does not (does not request it in "parameter request list" - option 55 - in DHCP request).


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Actually, packet on switch A is getting drooped because you received a DHCP client packet with option82 on a untrusted port. This option-82 is inserted by the switchB. I think below should work - On, SwitchB - disable option 82 so that this does not insert these options. mark the interface-25 as trust to allow DHCP server packet to flow down to the. ...


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If you have linux clients (and Macs) you can use DHCP option 119 Domain-search-list. If you have a WIndows DHCP server then in the windows DHCP snap-in you'll find it in the server scope pre-defined options. You have to add option 119 there. You have to choose byte array and you have to enter the bytes of the search domains in a kind of weird pascal ...


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If you got multiple subnet linked from a switch in exemple and your main router as your gateway CAN'T do ICMP Redirect, you better give the default gW, or route 0.0.0.0 to the router with the internet behind and to do static rule in the computer to make the computer talk to other router to go somewhere else (like another site) Only time I seen it can be ...


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As long as the routing is in place such that the DHCP relay to Router 0 actually traverses Router 2 & 1 to Router 0 and back, then yes, it will work just fine. It's no different than VLANs across Layer 3 switches with IP Forwarding enabled. You could even think of it as getting a DHCP address across a WAN link from a remote DHCP server if you'd like.


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You would need to create a static DNS entry on your DNS server for the ESXi host. It's not going to automatically create a DNS registration for you. Edit: It is possible to have an ESXi host perform a dynamic DNS registration (DDNS) if you go into the bowels of the ESXi command line and instruct it to... It's a strange request, as adding a static entry is ...


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You can override the default gateway provided via a DHCP lease by running the following two commands from an elevated Command Prompt (adapted from this Technet thread): route delete 0.0.0.0 mask 0.0.0.0 <DHCP_GATEWAY_IP> route add 0.0.0.0 mask 0.0.0.0 <NEW_GATEWAY_IP> If you don't want any default route, simply omit the route add command. ...


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this command show the DNS server on your net dig | grep SERVER: | awk -F# '{ print $1 }' | awk -F: '{ print $2 }' 172.17.0.1


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I have to disagree to the previous fixes. except for pepoluan's answer. Although i don't know if pepoluan's is a true white list technique, it is close to the right answer. To block all data to the wrong mac is your goal. Just disabling dhcp to non registered mac's is not a fix, if they set manual ip's which is usually one of 3 ranges... 10.0.0.x, ...


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Alright. I spent probably a total of five hours on this problem before arriving at an answer. @Sirex's suggestion to uninstall cloud-init was the clue. Essentially, cloud-init is a service built into most EC2 images (AMIs), including AMI Linux and CentOS. The system does lots of things (google it), and is probably useful for certain provisioning and ...


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uninstall cloud-init. This drove me mental the first time :-) Still looking to find time to work out how to make cloud-init set the hostname as expected (from a tag or such) - not got that far myself yet.



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