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To add the option to an existing DHCP scope, navigate to the DHCP server When not using the wizard, follow the steps below to manually add a DHCP server: GUI: Access the EdgeRouter Web UI. Here are the instructions for setting up Level 3 adoption via DHCP option 43 in OPNSense: Go to Services > DHCPv4 > [the relevant interface] > Additional Options > Advanced. DHCP options are defined in RFC 2132, DHCP Options and BOOTP Vendor Extensions. rchase. I use a Ubiquiti router. It is also possible to enable the VCI in the options section and define the VCI-String: config system dhcp server. Apr 23, 2015 · Non-Linux DHCP. Hi All, We have Ubiquiti Wifi with a CloudKey, Basically at the moment on our wifi, the users can get any If you are lucky and all of the machines in a given DHCP zone can use the same network boot client mechanism, your DHCP server only needs to provide two options: Server-Name (option 66) with the IP of the Sidero TFTP service; Bootfile-Name (option 67) with the appropriate value for the boot client type: Legacy BIOS PXE boot: undionly. Connect the UDM Pro to the Fortigate and connect all switches through the UDM. The switch is configured with a dhcp server that hands out dhcp options for a tftp server (for pxe)Switch config: dhcp server dns server ipv4 172. Enter the IP address of your trusted DHCP server. •DHCP option 150 supports a list of TFTP Apr 23, 2015 · Non-Linux DHCP. Windows Server DHCP. Overview. Click Preview at the bottom of the configuration window to see a preview of the command that will be sent to change the router’s configuration. Thus, the purpose of using DHCP option 43 or DNS is to allow the AP to know the IP of the controller. WDS listens for PXE related DHCP broadcasts, which contain architecture information. Make a DHCP entry a static map if you want, but almost always use DHCP. Anything going to it would go normally over the internet. https://hostifi. A packet capture shows that the Flex Mini receives the option 43 parameters just fine, so it seems like it's failing to parse the suboptions correctly - the format of Jun 23, 2023 · In this video I explain in simple terms what DHCP and what DHCP options are and also show you how to make use of DHCP Option 42 (NTP Servers) in your UniFi N 2. Therefore you set the default DNS servers to 0. [edit] root# set system services dhcp option 66 string "tftp://10. 36 tftp server file ipv4 pxelinux. Under Edit Network - LAN (or whatever you have named your network) uncheck DHCP Server which will disable the Ubiquity DHCP. Admin Settings Change Logs. For a list of option numbers, names, and descriptions, refer to RFC-Defined DHCP Option Numbers. 0/24). UniFi Network Devices: SSH is enabled by default. Let's say the native IP address on the fortigate is 192. It avoids mistakes, avoids IP conflicts, allows you to configure more than just IP, mask, gateway and DNS, such as unifi controller, ntp settings, etc. Define the DHCP parameters such as the subnet range and DNS servers. Have a top of rack switch connect to the Fortigate, and connect the UDM to that top switch. # option space ubnt; option ubnt. May 30, 2024 · These tables show the standard options currrently defined for both DHCPv4 and DHCPv6 and which ones are supported in the ISC DHCP server and Kea DHCP servers. server via DHCP; the "sname" field in the DHCP header [ RFC2131] and. Navigate to the Clients screen in the controller and select + Add Client at the top. It can also be the IP address of the TFTP server. The Add DHCP Option Object dialog displays. Code need to be set to 43. This is only recommended for advanced users, or those adopting devices when using Official UniFi Hosting. 3. The command should be more or less the same for anything using OpenWRT. WAN2: ISP. If you are lucky and all of the machines in a given DHCP zone can use the same network boot client mechanism, your DHCP server only needs to provide two options: Server-Name (option 66) with the IP of the Sidero TFTP service; Bootfile-Name (option 67) with the appropriate value for the boot client type: Legacy BIOS PXE boot: undionly. 32. Choose between Local, Remote User VPN, and Site-to-site VPN. Password: abcdef12345. This includes a Draytek Vigor 130 modem and a mesh WiFi System - hopefully Orbi. DHCP option 66 (TFTP Server Name) needs to be configured on the DHCP server to provide the provisioning server URL in the DHCP ofer packet. Like option 150, option 66 is used to specify the Name of the TFTP server. 5) Option 66 Option 67 The DHCP options are BOOTP vendor information fields that provide additional vendor-independent configuration parameters to manage the DHCP server. Add a new client with MAC + alias, click Add (don’t set fixed IP yet!). DHCP Options. Oct 17, 2018 · Personally, I'd forego dnsmasq and install kea or, if you want to retain your existing config and have enough space, isc-dhcp-server-ipv[46]. 100 - . The dynamic DHCP assigned address for a known client can be easily converted to a static mapping. If you do not use FOG to provide DHCP services, the following sections will give some indication of settings for DHCP servers on various platforms. I have a couple of clients though for which I set a specific DNS server using DHCP options. UniFi Network Application 8. How to add DHCP option 66 to Ubiquiti USG. Oct 10, 2021 · This video discussed how to enable crossing VLAN (Layer 3) UniFi device adoption, if the router is pfSense. Nov 7, 2023 · The Dynamic Host Configuration Protocol (DHCP) [ RFC2131] provides a framework for automatic configuration of IP hosts. Also when setting DHCP option 61 the LAN is still set for other DHCP parts like DHCP server. Thanks . Enable the DHCP relay functionality on the relevant interfaces. Sep 13, 2017 · Step 4: Configure your DHCP network to use the “unifi” option. If it is you will need to exclude the MAC addresses of your DHCP servers to allow the DHCP requests on the network. kpxe The options are sent in a variable-length field at the end of a DHCP message. DHCP Option Type needs to be set to Hexadecimal. Services > DHCP Server > LAN1 > Actions > View Leases. May 12, 2021 · Notice the sentence: "You need to set the DHCP Option 60 for the WAN interface to 100008,0001 in the router configuration menu. The document "DHCP Options and BOOTP Vendor Information Extensions" [ RFC2132] describes options for DHCP, some of which can also be used with BOOTP. 2 - . That. [edit system services dhcp option] '66'. ATTENTION: Add all interfaces that should participate in the DHCP Relay process, including the uplink Individual client DHCP option on UDM pro. Three different approaches are discussed:- SSH- D Problems with DHCP and APs. I have several networks including VLANs (default, guest, IoT, DMZ) with 4 APs all on the default network. Site-to-site VPNs: OpenVPN, IPsec. UDR - DHCP option 61 on wan. UniFi VoIP Phones can be configured using a Configuration File through TFTP or HTTP/HTTPS download. EdgeRouter - PPPoE Server Rate Limiting Using WISPr RADIUS Attributes. I have a TL-r470T+ load balancing router managing my network. Under “IP > DHCP Server” then under the “Networks” tab, you will see a list of all your available DHCP networks. VPN Options with Asterisks* *These aren’t supported when using a UXG Lite/Pro with a self-hosted controller. I don't see kea as an OpenWrt package, but it runs easily on an old Raspberry Pi-class device (though I don't know your scale/load). LAN1: US 24 -> CloudKey Gen2. New comments cannot be posted and votes cannot be cast. Click on Networks. Find help and support for Ubiquiti Use DHCP. Jun 23, 2023 · In this video I explain in simple terms what DHCP and what DHCP options are and also show you how to make use of DHCP Option 42 (NTP Servers) in your UniFi N Hello! Thanks for posting on r/Ubiquiti! PXE boot issues without DHCP options 66 and 67 upvote CLI: Access the Command Line Interface on the EdgeRouter. I sacrificed my rarely-used PXE setup when I moved to Ubiquiti The reason I am applying option 66 to the LAN as well as VoIP VLAN is because a factory reset phone will not know the VoIP VLAN, it will get DHCP from the LAN. To do this, I need to specify the PXE server address (DHCP Option 66), and the boot file name (DHCP Option 67). This setting will ease the discovery and adoption of UniFi devices and is useful when the application is located on a different subnet. Available options differ depending on whether you are configuring an Option 125 Mitel Option 125 = The string above, which contains Options 128/129/130/132/133 In the olden days we used to layout each option, and some of us still do: Option 128 Mitel Option 128 = The IP of the Mitel Option 129 Mitel Option 129 = The IP of the Mitel Option 130 Mitel Option 130 = The following text: "MITEL IP PHONE" Dec 18, 2020 · Go to DHCP Option 43 and enter those Values: Type: Byte Hex-Button: checked Value: Windows Server: Go to Scope Options and add Vendor Specific Info: Binary: DD-WRT: services tab, enabled Dnsmasq, Additional Options: dhcp-option=vendor:ubnt,1, DNSMasq: Add this option to your pool config: dhcp-option=vendor:ubnt,1, ISC DHCP server DHCP option 66 (TFTP Server Name) needs to be configured Ubiquiti, Ubiquiti Networks, the Ubiquiti U logo, the Ubiquiti beam logo, and UniFi are trademarks or Feb 1, 2023 · 02 Feb 2023 11:30 AM. Option 66 is an open standard juniper supports it. WAN1: US 8 60W -> UAP AC Pro. 2. If you haven’t already been descriptive in your post, please take the time to edit it and add as many useful details as you can. If it has seperate fields for username and password then type; Username: abc123@skydsl. Chris Sherwood with Crosstalk Solutions is available for best pr Under Settings > Services > DHCP, you can enable option 150 which should work for most VoIP phones. (ARCHIVED) EdgeRouter - PPPoE RADIUS Disconnect Daemon. Enter a friendly name for the phone you are creating a reservation for. The credentials consist of a random string of characters. 192. Set your fixed IP. I run DHCP on a Linux virtual server on my network and am assessing whether to move DHCP to my new UDM Pro, and thus keep the networking functions together in the Unifi network interface. I am trying to setup DHCP Option 43 to manage Unifi devices across all three LAN ports of the USG Pro 4. 0. When a UniFi VoIP Phone boots up or reboots, it attempts to get the provisioning server URL from DHCP option 66 and fetch the configuration file named uvpMAC. After the server has been created, it will appear in the list in the DHCP Server tab. Left alone, it will provide the correct boot file to the client based on that architecture information. Due to that, I am stuck with the default of 192. Per the UniFi docs, I could do this by having DHCP Option 43 look like the following Linux example pulled from their docs: Q&A. Select the Map Static IP option for the dynamic lease that needs to converted to a static mapping. All my other networks are configured with MS DHCP for the Domains. If you have a UniFi gateway and are using the built-in server, use the network's Gateway IP here. DHCP Overview from DNS/DHCP Console (Netware 6. UDR - DHCP OPT 61 on WAN. This is not an issue for other UniFi devices. RFC 2132 defines option 66. Enter the MAC address of the phone, using lower case letters and no Individual client DHCP option on UDM pro. Use the following commands from the CLI: configure set service dhcp-server shared-network-name <DHCP Pool Name> subnet <DHCP Subnet> tftp-server-name <TFTP IP> commit save exit. May 11, 2023 · There are two ways to configure option 66. 70 10. DHCP offers will be blocked from all but the specified DHCP server. 8. Under Code enter 130. Hope this helps! Jan 3, 2007 · I was interested in enabling Option 66 (TFTP Server Address) and Option 42 (NTP Time Server address). 36) I can't seem to find the options where I can easily set my DHCP range. Either enable it in IP range or in options, or enable in IP range if there is an option that is specific to the vendor. Mar 13, 2018 · The next step is to disable the Ubiquity DHCP server. 2. I followed the all iVentoy's documentation but I can't get it to work in Omada. 18. Type: string Value: “hex digits from calculator” Note the hex digits must be enclosed between quotation marks. Available options differ depending on whether you are configuring an Setup: USG Pro 4. DHCP Name: LAN1. Then it will download its configuration file, which will give it its correct VLAN. set service dhcp-relay interface eth2. Seems TP-Link needs to push firmware updates to their Feb 14, 2013 · DHCP option 66 is the name of the TFTP server. While there is a field for Option 66 on the DHCP configuration page, there is Jan 6, 2024 · VPN Options, generally: VPN Servers: Wireguard, OpenVPN, L2TP. dhcp-option=42,192. Fortigate firewall setups the connection and a small number of VLANS. On the workstation, open a Web Browser and enter in the address bar. Log into the router using the default credentials. Browse downloads by product and explore popular and new Ubiquiti applications. @Olithetech. The DHCP Server page includes settings for configuring the SonicWall security appliance’s DHCP server. This step is vendor specific. I am trying to configure some of my computers to be able to boot using PXE. Still on the Clients screen, select + All Configured Clients on the top. ) In this particular setup only one VoIP phone vendor at a time could be specified in the option 66, so custom settings were going to be needed to make all the other vendors phones work properly. com Overview. Click Save. I'd look into the PXE-boot package you're using and see if you're missing some files. 1. edit <id> set vci-match {enable | disable} A quick how-to on setting up an EdgeRouterX for Fibre with DHCP On the UDM Side I have configured DHCP Option 61 under WAN and WAN2. Archived post. 2) and had DHCP on the router set up to assign the VPN gateway by default, but also where I could set a static lease and put a "novpn" tag on it make it assign the primary gateway to that client. Under Value enter MITEL IP PHONE. Set `boot-server' instead of `option 66'. 12. 2". •. Basically they started years ago had a Comcast router with no other firewall which probably could not have the DHCP shut off, just stupid bad work in general. NOTES & REQUIREMENTS: Applicable to the latest EdgeOS firmware on all EdgeRouter models. unifi-address code 1 = ip-address; class "ubnt" {. 20. configure. If there is any doubt, the Kea User Guide includes two tables: supported standard options for DHCPv4 and DHCPv6. I also had a VM acting as a VPN gateway (192. . Enter the IP Address that you wish to be assigned to the phone. In this period, the DHCP server ProcessingLoop thread hangs until the name resolution completes, which is by design. Click on the gear icon in the lower right to access Control Center. Mar 6, 2013 · DHCP Option 150 is Cisco proprietary. I REALLY want to get rid of Sky router from the setup. •DHCP option 150 supports a list of TFTP Mar 30, 2016 · (Option 66 is part of IETF RFC 2132 which states that this option uses FQDN or IP address to point to a TFTP server. hostname must then be translated to an IP address. 100". The IEEE standard that matches with this requirement is Option 66. [edit] root# commit check. After I have restarted the vigor and connected it into the WAN port for the UDM-Pro, the UDM-Pro isn't given a IP address and I get no internet access. Oct 1, 2018 · I'm trying to make setting up some Ubiquity (UniFi) devices behind a FortiGate somewhat simpler, by providing info in DHCP Option 43 to point the UniFi devices to the UniFi controller (which is not on the same subnet). Choose Custom from the Option drop-down. of information, however, contain the TFTP server's hostname. Find out more. Double click on your network and assign it the unifi option that we just created. Click on Create New Network. Posted by a Superuser, not a Sky employee. My ISP (Sky in the UK) seems to authenticate it’s service using DHCP Option 61 / MER. You can use the SonicWall security appliance’s DHCP server or use existing DHCP UniFi Consoles: SSH is disabled by default. Step 5: Plug in your *factory default* device Configuring Custom DHCP Options in the latest Unifi Controller (6. Oct 17, 2020 · Write the MAC down somewhere. LAN2: US 16 150W -> UNVR. A DHCP client can negotiate with the server, limiting the server to send only those The reason I did it in the format dhcp-host=set:${network},${mac},${ip} is because I simply copied how Ubiquiti did it if you check the other dhcp* files in the dnsmasq config folder. Looking in the WAN settings I can't see DHCP option 61 for authentication on WAN. 4. Username: ubnt. (ARCHIVED) EdgeRouter - Sample Scripts to Change the Configuration. Find and fix vulnerabilities Oct 14, 2021 · The SonicWall security appliance includes a DHCP (Dynamic Host Configuration Protocol) server to distribute IP addresses, subnet masks, gateway addresses, and DNS server addresses to your network clients. Apr 19, 2024 · Navigate to Security & SD-WAN > Configure > DHCP (or, on the MS switch, Switch > Configure > Routing & DHCP > [the interface being edited] > DHCP settings) Under DHCP options, click Add a DHCP option. Dec 26, 2023 · If option 66 is configured as a server name, the DHCP server will perform name resolution over broadcast protocols (NetBIOS and LLMNR). If you can get your PXE client to request the correct file from a TFTP server, it pretty much means your DHCP is setup correctly, what happens after that is between the client and TFTP server. They require either Ubiquiti’s $29/month-and-up official UniFi Hosting service or a hardware Cloud Key. Layer 3 adoption is the process of adopting a UniFi device to a remote or cloud-hosted UniFi Network Application. To enable PXE boot, we first need to figure out what options Pi is asking for. Password: ubnt. The provisioning process outlined in this document is compatible with UniFi VoIP Phone platform/Phone app Changing DHCP Option 43 to remove all other suboptions will allow the Flex Mini to obtain the remote controller's IP successfully. Click on DHCP Setup, and select the interface that you want the server running on: 3. Here were the DHCP options: 3,192. 54. Go to Setting and click Networks on the side bar. Jul 25, 2018 · If it’s not flat, set an IP helper on the relevant switch to the WDS server. WAN Connection details. Expand the Reservations node of your DHCP Scope. Type a name for the option in the Option Name field. Click next, and enter the subnet that the DHCP server will serve, this will be the same subnet of the IP you set up in step 1: 4. Hence, my modem would need to be placed in Bridge mode and the router would have to authenticate the service using DHCP Option 61 - providing a client identifier string. Apr 19, 2023 · Release Date: 2023-12-12. On your WatchGuard Firewall the DHCP Options can be found under your interface/VLAN configuration: Select Network -> DHCP Options -> Add. I've setup DHCP on each network to assign addresses starting at . The process of configuring and managing IP phones and gateways is simplified, which makes deployment and management of devices fast and convenient. DHCP is enabled for all the networks. I understand this feature was added in to previous releases of the OS There are two commonly accepted methods to discover this. Then fill in the fields as follows: Number: 43. Additional DHCP options are described in other RFCs, as documented in this Aug 5, 2020 · Otherwise the client will receive the default scope. DHCP Option 67: UEFI Boot bootx64wdsmgfw. Put the Configuration File to the Provisioning server. I know other cases with different ISPs in Europe that have similar requirements, for example Orange which is the largest FTTH provider in France. Followed by another : and your controllers ip address in hexadecimal notation. When the server name is unresolvable, the name resolution takes time to fail. Both of these sources. Value needs a specific prefix of 01:04. Four settings are required when configuring a DHCP server: name The name of the DHCP scope (LAN). conf. instipod. From Option Number, select the option number that corresponds to your DHCP option. If the UDM has a single DHCP Option 61 field then type abc123@skydsl|abc123. xml from the provisioning server (MAC is the MAC address of the UniFi VoIP Enter the URL for DHCP Option 66 found on your ClusterPBX client account in the tftp-server-name field. Allows you to track all settings changes and who performed the changes. 1 and network 6. Configure whatever is necessary to turn off DHCP, set up a trunk connection between the UDM and the Fortigate, etc. 1 and 192. Readers will learn how to add custom options to the DHCP server configuration. To enable it, navigate to UniFi OS > Console Settings > SSH. 5) Option 66 Option 67 UniFi Consoles: SSH is disabled by default. If you add an IP address to the custom dns option 6 settings in the advanced tab the custom dns server will come after the two default servers listed here. Difference between Option 150 and Option 66. 11. EDIT: And still kill the DHCP options. Replace the items in brackets with the actual values from your environment. Thanks. set service dhcp-relay interface eth1. To use DHCP Option 43. Most computers these days are UEFI, but occasionally you may need to change it back to re-image an older Legacy BIOS. 100. However, UEFI BIOS and Legacy BIOS need different values for this DHCP Option. 64/27 default-gateway 10. Make sure to upgrade it before continuing on to the next section. 5. Right Click the "Reservations" node and select "New Reservation". Enter configuration mode. VLAN 10 and VLAN 20. 24 adds support for Admin Settings Change Logs, increases the network limit to 255, and includes several stability fixes and improvements. In ubiquiti NanoHD settings there's the NETWORK and then the WIRELESS NETWORK settings. Add a DHCP Option. Note: DHCP guarding requires UniFi switches. This way the UDM would be physically connected to the other Mar 6, 2013 · DHCP Option 150 is Cisco proprietary. 1. 2 Jan 25, 2022 · Configuration. Hello! Thanks for posting on r/Ubiquiti ! This subreddit is here to provide unofficial technical support to people who use or want to dive into the world of Ubiquiti products. Option 66 Option 67 Novell (Linux) Server DHCP. Aug 5, 2020 · Otherwise the client will receive the default scope. For example, the DHCP Message Type is option 53, and a value of 1 indicates the DHCPDISCOVER message. xml). Czl2. They may be helpful in planning migration from one server to the other. See full list on blog. Award. For example, you might need to configure a FortiGate DHCP server that gives out a separate option as well as an IP address, such as an environment that needs to support PXE boot with Windows images. Step 2:Set up the DHCP server. beerczar (BeerCzar) May 18, 2021, 6:58pm 4. Click Apply and wait until you see the message The configuration has been applied successfully. Host and manage packages Security. Thanks for posting on r/Ubiquiti! This subreddit is here to provide unofficial technical support to people who use or want to dive into the world of Ubiquiti products. I have entered the controller's IP address into the DHCP Option 43 field in the LAN settings but as soon as I connect the Mar 30, 2016 · (Option 66 is part of IETF RFC 2132 which states that this option uses FQDN or IP address to point to a TFTP server. I have an iVentoy pxe server running on a linux server. Looking up that particular option in the manpage, it's a bit confusing what it does. Dec 22, 2009 · Open your DHCP Console. 0 ! subnet 10. Confirm that the device is running the latest firmware from our page. 34 tftp server option 66 ipv4 172. Click on IP then DHCP Server: 2. May 18, 2021 · In the UniFi settings > Wireless Networks > Advanced options - Check and see if the Block LAN to WAN Multicast and Broadcast data is checked. Create a new Unifi “client” to hold your reservation. subnet The subnet range (192. 8 and 4. The default DNS settings for this DHCP scope are 8. 89 Dec 11, 2016 · The PXE Boot setting is configured in DHCP Option 67. SUMMARY In this example I am configuring Option 66 for 2 different VLANs aka LAN and VoIP. efi DHCP Option 67: Legacy Boot bootx64wdsnbp. EdgeRouter - Virtual Private LAN Service (VPLS) with LDP Signaling. Configuring Custom DHCP Options in the latest Unifi Controller (6. net is my UniFi hosting service. VPN Clients: Wireguard, OpenVPN. Tried various times, all the same result. To use DHCP Option 43 You'll need to configure your DHCP Server. I guess dumping the UNIFI DHCP and installing MS DHCP for the subnet might be the best. 254 and I've been assigning my known devices myself with fixed IP addresses in the first . If DNSMasq is being used for DHCP server then enter the following options into the DNSMasq "Additional DNS Options" field on page "Administration | Services": dhcp-option=66,"192. 10. 1 . Services > DHCP Server > + Add DHCP Server. kpxe Nov 28, 2020 · DHCP Setup. Auto Provisioning is a time-saving feature that helps you to manage and deploy IP phones and gateways centrally on Yeastar P-Series PBX System. Three different approaches are discussed:- SSH- D Loading Ubiquiti Community Ubiquiti Community Host and manage packages Security. Aug 11, 2016 · A quick video detailing how to add DHCP Option 66 to Ubiquiti's EdgeRouter series of routers. View and configure them by navigating to UniFi Network > Settings > Advanced > Device Authentication. Just got a UDR, Running OS 2. As I am adding 16 port Poe switch and a bank of cameras too. Find and fix vulnerabilities How to configure Option 66 and 67 in Omada (with oc200). Jan 11, 2021 · I covered the basic setup of an L2TP remote user VPN in my UniFi Dream Machine review. This guide covers normal, local networks. Ubiquiti-USG-DHCP-Option-66. 99 range. Let's say there's two VLANs. to get the provisioning server URL from DHCP option 66 and fetch the configuration file named uvpMAC. 4. Opt 61 value is: anything@skydsl|anything. 0/24 This new UI change is welcomed but uncomfortable to find a lot of features. xml from the provisioning server (MAC is the MAC address of the UniFi VoIP Phone and should be in upper case, for example uvp24A43C065D85. Under Type enter Text. For example: Linux's ISC DHCP server: dhcpd. Enable DHCP Guarding. com To do so: Select a Network. New Ubiquiti user here. 168. So any help would be great. The detected pxe server is still my gateway instead of the IP of my linux machine running iVentoy. Please read and understand the rules in Is it correct to be setting the option 61 on the LAN side even though I thought it would be the WAN side. 65 range 10. The UniFi Network application option will allow UniFi devices to automatically discover the location of the UniFi Network application. Now it comes to the router side as we need to enable the extra options of DHCP such that Pi can find the NAS in the same network. Navigate to the Services tab to add a DHCP server. Find help and support for Ubiquiti products, view online documentation and get the Auto Provisioning Overview. edit <id> config ip-range. the "TFTP Server Name" option (66) [ RFC2132 ]. gt xg vs ap kf bx ib jr uk nx