Dhcp options cisco. 2. 04-17-2019 09:56 PM. dhcp ipv4. Configure the port on the edge switch that connects to the aggregation switch as a trusted port. This was easy on the ASA 5506 but I am at a The following tables display the DHCP options in various ways. View the predefined definitions on the List/Add DHCP Option Definitions page. Check the layer 2 path. So the MX/MS DHCP Server can be configured to reply back to those clients with the necessary values. Nov 12, 2008 · Right-click the DHCP Server Root, and then choose Set Predefined Options. They show the options sorted numerically, by Cisco Prime IP Express name, and by category. Ensure the switch is forwarding the DHCP discover. By using option 82, the Cisco IOS DHCP relay agent can include additional information about itself when forwarding client-originated DHCP packets to a DHCP server. 回線ID. Any existing DHCP server will do just fine, you just need to make sure your voice L3 interface can get to it via ip helper no differently from data subnets, and ensure you have proper option 150 pointing to CUCM TFTP server (s) defined as either part of the scope or globally. g. In ZTP, a DHCP server must be running on the same network as the new device that is being provisioned. When DHCP snooping is configured on a primary VLAN, you cannot configure snooping with different settings on any of its secondary VLANs. The Option Type box appears. In configuring local windows DHCP server option 150 for each location, what is the best practice in terms of server IP Jul 14, 2017 · I have a Cisco 1941 with some DHCP scopes on it and I need to add option 43 to them so they can locate our Cisco Wireless LAN Controller using CAPWAP, has anyone done this before? WLC = 192. My ISP requires to insert option 82 to every clients' DHCP request, so I was trying to configure that on my 9800-80 controller. Feb 20, 2024 · Step 1. Note With the DHCP option-82 on untrusted port feature enabled, use dynamic ARP inspection on the Mar 15, 2023 · Solved: Cisco AP DHCP Option 43 with Infoblox - Cisco Community. DHCP Option 150, can only be configured in the DHCP server. i tried to add an DHCP option request, but there is no NTP (42) value. 1 option 43 hex f104 The DHCP client sends option code 60 in a DHCPREQUEST to the DHCP server. PDF - Complete Book (3. com and co. In the Name field, enter a string value, for example, Option 43. DHCP options have a prescribed format and allowed values for their option parameters. Sep 20, 2022 · Option 150 is a DHCP option. Step 18. Step 7. Sep 9, 2019 · The DHCP server receives a relayed DHCP discovery/request from the fabric edge (in the default VRF). com Feb 9, 2016 · Session Initiation Protocol (SIP) server options contain either a list of domain names or a list of IPv6 addresses that can be mapped to one or more SIP outbound proxy servers. Options. DHCP Client Options using unicast mode. DHCP Client Option 12. The Cisco IOS DHCP server can also use option 82 to provide additional information to properly allocate IP addresses to DHCP clients. We are deploying CUCM 11 in Mixed mode with all phones in Secure Mode using LCS certs - due to this CUCM will be configured with FQDN and This appendix contains DHCP options and BOOTP vendor extensions from RFC 2132, and includes the validation type for each option, as indicated in Table 1. The phones pick up. 6973. May 9, 2021 · ip dhcp relay information option. 05 length in hex. We trying to achieve assigning dhcp option 43 based on VCI Rules are simple If the VCI is "ciscopnp" then it is a switch and. 2. A DHCP server offers configuration parameters The Cisco phone (afaik) looks for other dhcp-option numbers and CDP/LLDP packets. Cisco IOS XE Amsterdam 17. There are 2 key ways to handle DHCP, one is via DHCP RELAY and one is via DHCP PROXY. 6b00. 1E, the ZTP feature is implemented on Cisco Catalyst 4500-E Sup 8-E, SUP9-E, Cisco Catalyst 4500X, and Cisco Catalyst 3560CX. Mar 29, 2019 · How to Configure DHCP Options Support; Configuration Examples for DHCP Options Support; Feature History for DHCP Options Support; Restrictions for DHCP Options Support. Solved: Hi, Have a question around configuring DHCP scope option 150 parameter with IP address or DNS. Here's an example of Option 82 from a DHCP Discover packet. Hope this helps Feb 5, 2019 · Configuring DHCP Option 43. 09-12-2022 11:19 PM. May 2, 2005 · Figure 2 shows how the relay agent information option is inserted into the DHCP packet as follows: 1. . local option 67 ascii Boot\x86\wdsnbp. Choose IP Address as the Data Type. 0. You can use these options to allow DHCP proxy clients and relay agents to request an IP address for a specific subnet, and from a specific IP address range and scope. 文字列の変更をする場合も、同様の手順で設定可能です。. 14. The following is a DHCP Option 43 configuration example on a Windows 2003 Enterprise DHCP server for use with Cisco Aironet lightweight access points. 110. Jul 12, 2022 · DHCP options have a prescribed format and allowed values for their option parameters. Hi, I am trying to configure the option dhcp 67 on one of the cisco switches but I receive the error that the "dhcp doesnt allow raw option 67 " Any idea? Mar 14, 2019 · DHCP provides an internal framework for passing configuration parameters and other control information, such as DHCP options, to the clients on your network. Step 3. STEP 2 To configure an option that has not been configured yet, enter the field: • DHCP Server Pool Name equals to— Select one of the pool of network Jul 30, 2021 · The DHCP server translates the RADIUS attributes into DHCP options and sends this information back in a DHCP Offer message to the DHCP client. Sep 11, 2017 · The next-server address is used in bootp and PXE to specify to use different servers for DHCP and TFTP. Im trying to configure a voice vlan with dhcp on a cisco 2960 switch. Introduces support for unicast mode on DHCP. 00 null route label per RFC 1035. Configuring DHCP. Jul 29, 2022 · The illustration, User-Configured Suboption Packet Formats, shows the packet formats for user-configured remote-ID and circuit-ID suboptions The switch uses these packet formats when DHCP snooping is globally enabled and when the ip dhcp snooping information option format remote-id global configuration command and theip dhcp snooping vlan Solved: DHCP Option-82 - Cisco Community. May 9, 2023 · Note: T o allow option-82 packets, you must enable ip dhcp snooping information option allow-untrusted. ip dhcp relay information trust-all. That is it. No issues with the Remote Agent ID, I was able to insert eth_apmac and ssid. Dec 8, 2023 · DHCP Client Option 12, Option 82 Configurable Circuit ID and Remote ID Support for this feature was introduced on the Cisco Catalyst 9600 Series Supervisor 2 Module (C9600X-SUP-2). If there is a rate configured, ensure it is listed as well. For example, you can use a switch-configured hostname or specify an ASCII text string for the remote ID, and you can configure an ASCII text string to override the circuit ID. config dhcp opt-82 remote-id apmac-vlan-id —Adds the radio MAC address of the access point and the VLAN ID to the DHCP option 82 payload. Dec 3, 2012 · The Cisco DHCP Option 82 Configurable Circuit ID and Remote ID provides more naming choices in the Option 82 Remote ID and Option 82 Circuit ID suboptions. the syntax seems logical, but found this configuration example that shows space instead of comma. The parameter Dec 14, 2012 · Introduction - Brief description of DHCP Option-82. IP Addressing Services Configuration Guide, Cisco IOS XE Gibraltar 16. 設定パラメータと他の制御情報は、DHCPメッセージのオプションフィールドに保存されているタグ付きデータ項目で伝送されます。. ip dhcp pool Solo. Switch Configured as Relay Agent. AP CLI 上で reload を実行し、起動時に ‘Esc To configure one or more DHCP options: STEP 1 Click IP Configuration > IPv4 Management and Interfaces > DHCP Server > DHCP Options. 63 ascii hex value of character. The command would be the same as you would use for option 150. The switch doesnt seem to get the DHCPDiscovers. Mar 12, 2024 · Some Cisco/Mitel IP phones will specifically request DHCP Option 130 and 150. All the DHCP options appear, but clients control only some, and the CLI only others. Previously we had DHCP Option 150 configured on our Windows 2012 DHCP Server with only one TFTP IP Address, and are changing the DHCP Option 150 configuration to an ARRAY with 4 TFTP Addresses. switch#show ip dhcp snooping Switch DHCP snooping is enabled Click the dhcp-config (DHCPv4) or dhcp6-config (DHCPv6) link to open the Edit DHCP Option Definition Set page, then click the Option Definitions tab. DHCP now supports option 82 (sub-option 5). The routes remain in the routing table until the DHCP lease expires Cisco 7941/7961 not honoring DHCP options - Cisco Community. Oct 25, 2023 · Right-click ‘Server Options’: You’ll find this under the DHCP server in the console tree. Table 1 lists each DHCP option and parameter type (in the Validation column). The information sent via option 82 will be used to identify which port the DHCP request came in on. DHCP Option 82 Configurable Circuit ID and Remote ID Jul 29, 2021 · You can use this topic for information about new DHCP subnet selection options. This command configures all interfaces on a device as trusted sources of the DHCP relay information option. Lucent QIP DHCP 服务器. #242 with the necessary information(s) in a string (like 'MCIPADD=192 Aug 3, 2017 · Try adding options 60 (PXEClient), 66 (PXE server) and 67 (boot file) to the DHCP pool. On the General tab, scroll to Option 43 and check the 043 Vendor Specific Info check bo. This Option 43 sub-option code is for the Cisco 1000 series access points Oct 15, 2012 · By using option 82, the Cisco IOS DHCP relay agent can include additional information about itself when forwarding client-originated DHCP packets to a DHCP server. The operating system is designed to appear as a DHCP Relay to the network and as a DHCP server to clients with industry-standard external DHCP servers that support DHCP Relay, which means that each controller appears as a DHCP Relay agent to the DHCP server and as a DHCP server at the virtual IP address to wireless clients. If the DHCP Server is configured appropriately it can provide specific information to that type of client - for example Ericsson IP Phones send 'Ericsson IP-Phone' in DHCP Option 60 in their DHCP Discover & Request packets. This appendix contains DHCP options and BOOTP vendor extensions from RFC 2132, and includes the validation type for each option, as indicated in Table 1. DNS Search List Option DNS Search List (DNSSL) is a list of Domain Name System (DNS) suffix domain names used by IPv6 hosts when they perform DNS query searches for short, unqualified domain names. Mar 30, 2011 · DHCP. config dhcp opt-82 remote-id apname-vlan-id —Adds the AP name and its VLAN ID to the DHCP option 82 payload Option-82 required on both DCHP for IP allocation and SCCM for PXE boot to work. The DHCP server sends a DCHP offer/ack to the fabric edge (in the VRF campus guest). 1. SDA Fabric uses anycast gateway IP, thus FE switch add Option-82 header contains FE switch identifier (Loopback IP). One option carries a list of domain names, and the other option carries a list of 128-bit IPv6 addresses. Enter the Option 43 sub-option in hex. *By default, if the gateway address is set to all zeros in the DHCP packet and the relay agent information option is already present in the packet, the DHCP relay agent will discard the packet. Now that we did this, we tested by rebooting a Cisco phone. if i change the access vlan from 2211 to 135, the switch recieves a DHCPDiscover and the phone gets an IP address. 35 MB) Nov 15, 2022 · DHCPv4 Client Options. But I can't seem to find how to insert Agent Circuit ID. Dec 8, 2023 · When the MAX_PACKET_SIZE exceeds 15, and option 52 is configured, the DHCPv6 server does not send DHCP packets. Apr 2, 2005 · DHCP Address Allocation Using Option 82 Feature Design. 10. The command would be (Under ip dhcp pool : option 176 ip . Hi all, I have a new Cisco FirePower 1010 that I have configured for a small remote office. Note: As with most DHCP servers, the MX/MS DHCP server will automatically send the following along with an IP lease based on the MX/MS subnet and DHCP DNS server Apr 21, 2020 · Options. 28. The client, Host A, sends a DHCPDISCOVER broadcast message to locate a DHCP server. Table B-10 lists each DHCP option and parameter type (in the Validation column). Dec 3, 2012 · A DHCP client is an Internet host using DHCP to obtain configuration parameters such as an IP address. The previously-configured DHCP options are displayed. Chapter: DHCP Options. DHCP Server Configuration for Zero-Touch Provisioning. The following tables display the DHCP options in various ways. Siga estas etapas para configurar a opção 43 do DHCP no servidor DHCP do Cisco IOS integrado, para todos os APs Cisco Aironet com o Cisco IOS. Thus BDR can return the DHCP Reply or PXEBOOT reply from SCCM to correct FE switch by reading Option-82 returned back by DHCP/SCCM. Cisco Network Registrar DHCP 服务器. Example: Router (config-if)# ip dhcp client hostname router1. You can use DHCP Option 43 to provide a list of controller IP addresses to the access points, enabling them to find and join a controller. Mar 6, 2018 · In Cisco IOS XE 3. This should work fine without any issue. 9. Apr 18, 2019 · Level 1. Use the Cisco Feature Navigator to find information about platform and software image support. Refer to Feb 19, 2010 · Hi all, Could someone share a link or a document on how to configure DHCP server in IOS with option 150 for CUCM ? I am trying to configure DHCP on a 3750 switch for a test environment. 09-27-2017 03:45 AM - edited 03-17-2019 11:15 AM. 0 Helpful. Enter configuration mode at the Cisco IOS CLI. What to look for in DHCP Option 82. Choose the newly created Vendor Option Class in the Option Class field, and then click Add. Aug 16, 2018 · DHPC Option 60 の文字列の変更. The phones are connecting to the DHCP server, which returns a response with options 66 and 150 to route to a specific Tftp server. Now, I'm trying to get Cisco APs to lite up over the tunnel and I need to configure DHCP option 43. This feature is designed to allow the Cisco IOS XE DHCP server to use option 82 information to help determine which IP addresses to allocate to clients. Configuration parameters and other control information are carried in tagged data ite Jul 28, 2009 · Hi , I need to configure DHCP option reservation ( Reserving particular IP for particular MAC address ) in ASA . 16. My router DHCP is: ip dhcp pool vlan20 network 172. This helps with splitting the horizon therefore improving security of the network. Step 4. Cisco IOS XE Cupertino 17. Mar 31, 2023 · The Cisco IOS XE DHCP implementation also allows most DHCP server options to be customized. 168. DHCP Option 82 Configurable Circuit ID and Remote ID . Step 2. Confirm if DHCP Snooping is enabled on the desired VLAN and ensure trusted and untrusted interfaces are well listed. 0 default-router 172. This appendix also contains the standard Microsoft client options and several tables displaying the options sorted by categories. Ensure the switch is receiving the DHCP discover packets on the client port. DHCP options carry parameters as tagged data stored within protocol messages exchanged between the DHCP server and its clients. 0275. Configuration parameters and other control information are carried in tagged data ite The figure below shows the packet format used when DHCP snooping is globally enabled and the ip dhcp snooping information option global configuration command is entered with the Circuit ID suboption. When the server receives option 60, it sees the VCI, finds the matching VCI in its own table, and then it returns option 43 with the value (that corresponds to the VCI), thereby relaying vendor-specific information to the correct client. 当部署思科无线统一架构 Apr 2, 2005 · The DHCP—Statically Configured Routes Using a DHCP Gateway feature enables the configuration of static routes that point to an assigned DHCP next-hop router (provided by DHCP option 3). Nov 30, 2007 · Yes, you can configure your Cisco Switch/Router as DHCP Server and use option 176. 05-14-2021 07:59 PM. The parameter formats and allowed values come from the DHCP and Internet RFCs. DHCP option 82 provides additional security when DHCP is used to allocate network addresses. 1 dns-server 172. Nov 14, 2008 · Right-click the DHCP Server Root, and then choose Set Predefined Options. uk. Select ‘Configure Options’: This will open a new dialog. x (Catalyst 9300 Switches) Chapter Title. profile MYGROUP relay. Type is always the suboption code 0xf1. DHCP consists of two components: a Feb 11, 2017 · I have environment that has a Voice VLAN already DHCP scope is configured with option 66 pointing to TFTP server e. Confirm the path of the packet. Relay has been supported for a long time. The static routes are active only when the DHCP server provides the next-hop IP address. Jan 31, 2008 · The IP Phone can signal to the DHCP server what it is via DHCP Option 60 (this is the Vendor Class stuff I mentioned). The DHCP Client supports configuration of all 1-254 options. ip dhcp client hostname host-name. 11. I've had to migrate a few of our 7941/7961 phones and have run into a small, but significant issue. Jan 18, 2015 · The sub-options are all included in the DHCP offer as type-length-value (TLV) blocks embedded within Option 43. DHCP provides a framework for passing configuration information to hosts on a TCP/IP network. config dhcp opt-82 remote-id ap-location —Adds the AP location to the DHCP option 82 payload. May 15, 2021 · Options. Specifically, it enables the controller to act as a DHCP relay agent to prevent DHCP client requests from untrusted sources. This has to two domains, cisco. Is it possible to handle via a local IP DHCP configuration on a 3560 switch any DHCP option e. このオプションは、次の2つのサブオプションを設定することで機能します。. The Dynamic Host Configuration Protocol (DHCP) is based on the Bootstrap Protocol (BOOTP), which provides the framework for passing configuration information to hosts on a TCP/IP network. They show the options sorted numerically, by Cisco Prime Network Registrar name, and by category. 10. The next-server (option 12) and bootfile (option 0) DHCP options typically specify the TFTP server and filename of the initial boot loader. The options can be verified from either Sniffer capture or debug DHCP messages. The figure below shows the basic steps that occur when a DHCP client requests an IP address from a DHCP server. DHCP adds the capability to automatically allocate reusable network addresses and configuration options to Internet hosts. XR421 adds the full capability of proxy (in combination with IP subscribers) Configuration: in its simplist form. These features were implemented on supervisor modules C9400X-SUP-2 and C9400X-SUP-2XL, which were introduced in this release. Mar 4, 2022 · External DHCP Servers. Note: TLV values for the Option 43 suboption: Type + Length + Value. Please tell me is possible in ASA . Entre no modo de configuração na CLI do Cisco IOS. Oct 17, 2011 · switch(config)# ip dhcp relay sub-option type cisco : Enables DHCP to use Cisco proprietary numbers 150, 152, and 151 when filling the link selection, server ID override, and VRF name/VPN ID relay agent Option 82 suboptions. If the IETF attribute, such as Framed-IP-Address is received from the RADIUS server, and if it is present in the user profile, then this attribute is used instead of allocating the IP address from the May 3, 2012 · i configured the interface gigabit 0/0 as dhcp client. Thanks in advance !!! D. 04-22-2020 06:14 AM. Fill in the required information. the DHCP option-82 on untrusted port feature, which enables untrusted aggregation-switch ports to accept DHCP packets that include option-82 information. FE1# debug ip dhcp snooping {event | packet} <-- Assuming that dhcp snooping was enabled via Cisco DNA Center. Dec 3, 2012 · Glossary. domainname. So i configured DHCP scope with option 150 pointing to TFTP server e. option 119 hex 0563. This feature is designed to allow the Cisco IOS DHCP server to use option 82 information to help determine which IP addresses to allocate to clients. Solved: Is is possible to set up the following dhcp options on the dhcp pool of a cisco router? AVAYA VOIP SETTINGS DHCP option "176" DHCP option string Level 1. I f so pleas e tell me how can we configure the same in ASA and router . 255. 20. 85 MB) PDF - This Chapter (1. g: 10. This goes at the end of each domain name. Jul 31, 2019 · How to Configure DHCP Options Support; Configuration Examples for DHCP Options Support; Feature History for DHCP Options Support; Restrictions for DHCP Options Support. The following example configures DHCP option 2, which specifies the offset of the client in seconds from Coordinated Universal Time (UTC): Oct 15, 2012 · The Dynamic Host Configuration Protocol (DHCP) is based on the Bootstrap Protocol (BOOTP), which provides the framework for passing configuration information to hosts on a TCP/IP network. The no option causes DHCP to use RFC numbers 5, 11, and 151 for the link selection, server ID override, and VRF name/VPN May 10, 2012 · The data items themselves are also called options. Nov 3, 2022 · In the DHCP Server scope, right-click Server Options and choose Configure Options. Regards , Sinjish. The DHCP client generates a DHCP request and broadcasts it on the network. 0363. Table 1 and Table 1 list each DHCP option and parameter type (in the Validation column). Specifies or modifies the host name sent in the DHCP message. Solved: Hi All, Can anyone explain what dhcp option-82 is used for? Like any specific use-cases? I really do not see the point in using it as I have always had success relaying with out it to dhcp server. Mar 29, 2019 · Book Title. 2 mcport 1719. All is working fine, but the NTP will not be configured. 0002. リモートID回線IDサブ To configure DHCP Option 43 for Cisco Aironet 1100, 1130, 1200, 1240, 1250, 1300, 1520, and 1550 series access points in the embedded Cisco IOS DHCP server, follow these steps: Step 1. データ項目自体もオプションと呼ばれ 本文档提供适用于以下DHCP服务器的轻量Cisco Aironet接入点 (LAP)的DHCP选项43的配置示例:. DHCP は、TCP/IPネットワーク上のホストに設定情報を渡すフレームワークを提供します。. Check the Options Needed: Browse through the ‘Available Options’ and check the boxes for the options you want to configure globally. DHCP Option 150 instructs the clients "what is the IP address of my TFTP server". On the device I set to use DHCP Option 132 to obtain the VLAN ID. Hello, I need to automate the VLAN ID configuration for Cisco CP 6851 model devices. Not exactly. The DHCP Server sends to me DNS, Default GW and NTP. 6f6d. For example, the TFTP server, which stores the Cisco IOS XE image, can be customized with option 150 to support intelligent IP phones. 05 636973636f 03 636f6d 0002 636f 02 756b 00. Solved: Hello, First of all this is probably more Infoblox related but i would like to know if you have any tips. 636f. Figure 1. Vendors can define these sub-options as per their wish. 以下では、AIR-OPT60-DHCP オプションなしで購入された AP に、手動で “-ServiceProvider” の文字列を付加する手順を説明致します。. Enter the DHCP option that you want to add. Option 82 is organized as a single DHCP option that contains information known by the relay agent. Note. There are 2 sub-options in the Option 82 message, which help identify the end client requesting for an IP address: Agent Circuit ID. Configures the duration of the lease for an IP address that is requested from a DHCP client to a DHCP server. Jul 11, 2023 · switchxxxxxx(config-dhcp)# option 19 boolean true description "IP Forwarding Enable/Disable Option" Example 2. Microsoft Windows 2008 企业 DHCP 服务器. Dec 3, 2012 · See the “DHCP Snooping Option-82 Data Insertion” section of the Cisco 7600 Series Cisco IOS Software Configuration Guide for information about using DHCP to centrally manage the IP address assignments for Mar 29, 2019 · The illustration, User-Configured Suboption Packet Formats, shows the packet formats for user-configured remote-ID and circuit-ID suboptions The switch uses these packet formats when DHCP snooping is globally enabled and when the ip dhcp snooping information option format remote-id global configuration command and theip dhcp snooping vlan オプション82 は、DHCP リレーエージェントがDHCPサーバに転送中の要求に回線固有の情報を挿入できるようにすることを目的として設計されました。. Apr 2, 2005 · Router (config-if)# ip dhcp client lease 2. Options by Number Dec 21, 2011 · The data items themselves are also called options. Verify. Cisco IOS XE Fuji 16. These are the definitions that control the formatting of the option values you add to policies. 25 on the same voice vlan. Sep 13, 2022 · Cisco WLC 9800 DHCP option 82. Isso inclui todos os APs, exceto o VxWorks 1000 Series (consulte a próxima seção) e o 600 Series OEAP que não usa a opção 43. So for Cisco , we have following Option 43 sub-option code: Option 102:This value is returned in ASCII. Configuration parameters and other control information are carried in tagged data items that are stored in the options field of the DHCP message. Linux Internet Systems Consortium (ISC) DHCP 服务器. device (config-dhcp-voip)# option 176 mcipadd 1. Bootfile is optionally used by a client to request a particular type of boot file in a DHCPDISCOVER DHCP provides a framework for passing configuration information to hosts on a TCP/IP network. The data items themselves are also called options. 20 and Avaya phone are running. Router2901(config-if)#ip dhcp client request ? classless-static-route Classless static route (121) Dec 8, 2023 · DHCP Client Option 12. The controller can be configured to add option 82 information to DHCP Dec 8, 2023 · DHCP Client Option 12, Option 82 Configurable Circuit ID and Remote ID Support for this feature was introduced on the C9500X-28C8D model of the Cisco Catalyst 9500 Series Switches. option 60 ascii "PXEClient" option 66 ascii WDS-server. 0 255. On the DHCP Server I configured this same option, sending a string with the value 20 (vlan ID). For more details, see Option 82 Sub Option 5: RFC 3527 Sep 24, 2018 · Configuring DHCP Option 43. K May 14, 2015 · Solved: We have a CallManager cluster of three servers, Publisher in San Francisco, Subscriber 1 in Utah, Subscriber 2 in Toronto. I have most of what I need working including the S2S VPN Tunnel to an ASA 5515. We need to put cisco phone on the same vlan. Cisco IOS® DHCP 服务器. But no such luck when the vlan 135 is used as the voice vlan. The DHCP relay agent intercepts the broadcast DHCP request packet and inserts the relay agent information option (option 82) in the packet. xr gh fr aa el ch gy pp mw fd
July 31, 2018