The main location housed our Shoretel server and switches. All locations have either s or s mixed. The main location works fine with several hundred phones. Then it connects to one of many shoretel phone switches and all is good. One if the Fortinet loses power the phones have to be reset and the leases have to be deleted in order for them to connect again. The Second problem is if I do get the to connect within a day or so they lose the ability to connect back to the Shoretel switches.

They can always find DHCP and the FTP server the problem is we get "requesting service" when they attempt to connect back to the switch. To add to what we have already done for trouble shooting. We have contacted the ISP Comcast 2 X to ensure the new Netgear modem is in bridge mode and passing all traffic and has no firewall service turned on. Also much of this did not start happening until we did a firmware update from v4 Fortigate OS to the newest one which is 5.

At another location they do have issues with a reboot, but they have been up solid since setting them up after the reboot. They also are running 5. There are also routes and we able to ping all the devices that are needed for the phones at the same time they are not able to connect.

What was happening was each time we would lose connection at the remote location the traffic was being routed out the next best route which was the WAN at the main location. So instead you go to the CLI and create what they call a Black Hole Route, This route will be like the connected route with a lower priority. So now when the remote site goes down the traffic is sent to the black hole route until it detect the service has been restored.

Once it is back up the traffic goes then to the originally intended source which is the phones. So now no matter what after a reboot the phones come back up after a short time. Communication Group is an IT service provider. It sounds like maybe something with DHCP or the port access could have changed with the firmware upgrade?

DHCP Option Mikrotik настройка.

If you statically assign the phones does the problem go away? Do you have a partner that can assist you with looking into this? We have tried it both ways static and DHCP and after a period of time.

I am working trough a vendor who has access to Shoretel.

dhcp option 156 fortigate

Hope to get to them today. I also took a phone from our main location that has not been used in a while. When I plugged it in it took much longer to run it's downloads. But with this phone no mater what I do to it it comes back right away like it is supposed. If I unplug the phone it comes back and works and if I reboot the firewall it comes back up. So what I am going to try is to telnet in and send the configs to the vendor and see if they can find what is different.

That will probably get this going. Will post back thanks for the reply. I am guessing this is a rare combination of Shoretel and Fortigate.Posts Latest Activity. Page of 1. Filtered by:. Previous template Next. All though most people may know how to set this up I wanted to post this for those that may not know how. This DHCP option is not built into windows within the predefined options and therefore must be created and configured for your use.

NOTE If your organization is separated into separate subnets, make sure to select the proper subnet. For example, if you have a global organization and would like to configure the DHCP server to deliver the Spanish tones and cadences only to theIP phones in your office in Spain, you should make sure to select that particular subnet of users.

If you do not specify the subnet, then all phones that boot from this DHCP server will receive Spanish tones and cadences. Step 3 Click Add. Step 5 Set Data Type to String. Step 6 Set Code to and add a description, if desired. Step 7 Navigate to the scope options and add option Last edited by Lance ;PM. Tags: configserverdhcp optionsftpserveroptionphone options.

Options can be configured on multiple types of a devices and this process is not limited to a windows server. Comment Post Cancel.

Good stuff from Lance, as usual. Thanks for this info, I am sure many people will use this! DHCP Server must be enabled obviously. Create two Objects 2a. Shoretel Object name is irrelevant 2b. Option 2c. Option Type String 2d. Click OK 2f.A DHCP server provides an address to a client on the network, when requested, from a defined address range.

An interface cannot provide both a server and a relay for connections of the same type regular or IPsec. However, you can configure a Regular DHCP server on an interface only if the interface is a physical interface with a static IP address. If an interface is connected to multiple networks via routers, you can add a DHCP server for each network. The routers must be configured for DHCP relay. Edit the interface, and select DHCP in the addressing mode. Use the CLI command. These settings are appropriate for the default Internal interface IP address of If you change this address to a different network, you need to change the DHCP server settings to match.

The lease time determines the length of time an IP address remains assigned to a client. Once the lease expires, the address is released for allocation to the next client request for an IP address The default lease time is seven days. To change the lease time, use the following CLI commands:. For example, an environment that needs to support PXE boot with Windows images.

The option numbers and codes are specific to the particular application. The documentation for the application will indicate the values to use. The option is a value 1 and If you have a large address range for the DHCP server, you can block a range of addresses that will not be included in the available addresses for the connecting users. To do this, go to the CLI and enter the commands:. On this page, you can also add IP address to the reserved IP address list.

This is useful if you have limited addresses, longer lease times where leases are no longer necessary. For example, with corporate visitors.

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dhcp option 156 fortigate

Terms of Service Privacy Policy. Skip To Main Content. All Files. Submit Search. Address Range By default, the FortiGate unit assigns an address range based on the address of the interface for the complete scope of the address. For example, if the interface address is Select the range and select Edit to adjust the range as needed, or select Create New to add a different range.

By default, it is a Server. Select Relay if needed. In a typical situation, an IP address is assigned ad hoc to a client, and that assignment times out after a specific time of inactivity from the client, known as the lease time. To ensure a client or device always has the same IP address, that is, there is no lease time, use IP reservation. Lease time The lease time determines the length of time an IP address remains assigned to a client. Exclude addresses in DHCP a range If you have a large address range for the DHCP server, you can block a range of addresses that will not be included in the available addresses for the connecting users.Join us now!

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Platinum Member. Another option is to map the hostname "unifi" through DNS, but I don't believe I can do that with the FortiGate either, as it requires a domain to be specified and the UniFi gear needs it without a domain.

Dave Hall. Expert Member. Thanks Dave. Hope to test it Wednesday. There's still the catch that the FortiGate can't reply with this Option 43 data based on vendor ID, so it will be sending this out to anything asking for DHCP on this interface.

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Luckily its separate from the hosts, so should be fine. Will let people know if it works. Hex value as transmitted should be something like 2BA0B0C0D 2B specifies option 43, 06 is total number of bytes in the following data but that depends on if the FortiGate adds more of its own values to this which would change the length. Time for packet traces and wireshark. New Member. Thanks xBytez! That matches what I'm planning to test today.

Odd thing is that it's totally different than Fortinet's KB on using Option 43, which shows setting the hex value from to CLI to include 2B 43 decimal as the first byte. Toshi Esumi.This data is used by DHCP clients when communicating with the network. Note that some DHCP option codes are reserved for vendor-specific options. Click to Learn More. You can find out more about Cisco Meraki on our main site, including information on products, contacting sales and finding a vendor.

Most questions can be answered by reviewing our documentation, but if you need more help, Cisco Meraki Support is ready to work with you. In the Meraki Community, you can keep track of the latest announcements, find answers provided by fellow Meraki users and ask questions of your own. Sign in Forgot Password. Dashboard Support Contact Sales. Enter the desired value for the option in the Value field. In this example, meraki. Under Code enter Under Type enter Text. Save as PDF Email page.

Last modified. Related articles There are no recommended articles. Tags dhcp options. Classifications This page has no classifications. Explore the Product Click to Learn More. Article ID ID: Explore Meraki You can find out more about Cisco Meraki on our main site, including information on products, contacting sales and finding a vendor. Explore Meraki. Contact Support Most questions can be answered by reviewing our documentation, but if you need more help, Cisco Meraki Support is ready to work with you.

Open a Case. Ask the Community In the Meraki Community, you can keep track of the latest announcements, find answers provided by fellow Meraki users and ask questions of your own.

dhcp option 156 fortigate

Visit the Community.Very helpful, thank you! Even their own employees joke about how things move around and disappear all the time, and this is a good example of one. Having the instructions above though, configuring option 66 was really simple, so much appreciated.

Very good example.

FortiLink configuration using the FortiGate CLI

You Might show the same example but doing it in the menu of fortigate and not through the console CLI mode? I forti use os 4 and want to move to the current v5, for me? I don't think this opion 66 config would work. Thanks for pointing this out. It's not very helpful to read instructional articles that tell you how to do configure things incorrectly.

Option code If you have FortiOS 5. We'll go through the steps to configure a DHCP server from scratch and configure the most commonly used options as well as a few custom ones. Now that we've got the two hexadecimal values we can configure the DHCP custom options as follows:. Now we get to test it out! Labels: 5. Unknown 17 January at Matt 28 May at Alejandro 30 November at ToshiE 6 August at B 3 November at Unknown 8 October at Brenton Crosby 28 November at Newer Post Older Post Home.

Subscribe to: Post Comments Atom.A DHCP server provides an address, from a defined address range, to a client on the network that requests it. An interface can't provide both a server and a relay for connections of the same type regular or IPsec. However, you can configure a regular DHCP server on an interface only if the interface is a physical interface with a static IP address. If an interface is connected to multiple networks through routers, you can add a DHCP server for each network.

The routers must be configured for DHCP relay. Edit the interface, and select DHCP in the addressing mode. By default, the FortiGate unit assigns an address range based on the address of the interface for the complete scope of the address.

For example, if the interface address is Select the range and select Edit to adjust the range or select Create New to add a different range. You can enable or disable whether the DHCP relay agent option is added.

This option is disabled, by default. Use the following CLI command:. You can use DHCPv6 prefix delegation to assign a network address prefix, and automate the configuration and provisioning of the public routable addresses for the network. You can configure a range for DHCPv6 server prefix delegation. You can add a prefix range starting and ending prefixes and a prefix length. The prefix length determines the length of the prefix that the FortiGate sends downstream.

This feature is used to "hint" to upstream DCHPv6 servers a desired prefix length for their subnet to be assigned in response to its request. Also included in the new feature, are preferred times for the life and valid life of the DHCP lease. On low-end FortiGate units, a DHCP server is configured on the internal interface, by default, with the following values:. These settings are appropriate for the default internal interface IP address of If you change this address to a different network, you need to change the DHCP server settings to match.

The lease time determines the length of time an IP address remains assigned to a client. Once the lease expires, the address is released for allocation to the next client that requests an IP address. Separate multiple server entries with spaces. You can set a minimum DHCP renew time. This option is available only when mode is set to dhcp. The possible values for dhcp-renew-time are to seconds five minutes to seven days. To use the renew time that the server provides, set this entry to 0. The option numbers and codes are specific to a particular application.

The documentation for the application should provide the values you should use. Option codes are represented in option value and HEX value pairs. The option is a value between 1 and You can configure the settings for this feature using the ddns-update CLI command and some other ddns related options. In place of specific fields, the DHCP server maintains a table for the potential options. These optional fields are set in the CLI. Once you are in the options context, create an ID for the table entry, using the following CLI commands:.

If you have a large address range for the DHCP server, you can block a range of addresses that won't be included in the available addresses for the connecting users. On this page, you can also add IP addresses to the reserved IP address list. If you need to end an IP address lease, you can break the lease. This is useful if you have limited addresses and longer lease times when some leases are no longer necessary, for example, with corporate visitors.