Can a WLC act as a DHCP server?
The WLC controller could act as a DHCP server and allocate IP addresses to the following items and is enabled by default: Directly connected WLAs.
What is virtual interface in Cisco WLC?
The virtual interface is used to support mobility management, Dynamic Host Configuration Protocol (DHCP) relay, and embedded Layer 3 security such as guest web authentication.
How does DHCP work with the WLC?
DHCP Client Handling
Cisco WLC supports two modes of DHCP operations in case an external DHCP server is used, DHCP proxy mode and DHCP bridging mode. The DHCP proxy mode serves as a DHCP helper function to achieve better security and control over DHCP transaction between the DHCP server and the wireless clients.
Which IP address is recommended for the virtual interface?
best practice is to use the RFC 1918 address space or RFC 5737 (192.0. 2.0/24).
What ports does DHCP use?
The DHCP employs a connectionless service model, using the User Datagram Protocol (UDP). It is implemented with two UDP port numbers for its operations which are the same as for the bootstrap protocol (BOOTP). UDP port number 67 is the port used by the server, and UDP port number 68 is used by the client.
What is option 82 DHCP?
DHCP Option 82 is organized as a single DHCP option that contains information known by the relay agent. This feature provides additional security when DHCP is used to allocate network addresses, and enables the Cisco controller to act as a DHCP relay agent to prevent DHCP client requests from untrusted sources.
What are dynamic interfaces on WLC?
A dynamic interface is simply an interface that maps a WLAN to a wired vlan or subnet. Dynamic interfaces to be used to control and secure the traffic on the WLAN just like we would use vlans and subnets on the LAN for that purpose.
What is the purpose of the management dynamic and virtual interfaces on WLC 2504?
The virtual interface is used to manage and support wireless clients by providing DHCP relay functionality, guest web authentication, VPN termination and other services.
What is DHCP bridging?
Below is an overly simplified network diagram in which the DHCP server is in a different IP subnet than the client. With DHCP bridging, the client’s DHCP discovery and request frames would be passed to the upstream network, in this case, the first router (connected via a red link for illustration).
What is Cisco WLC virtual gateway IP address?
WLC Virtual IP address 1.1. 1.1 – Cisco.
What is the purpose of the virtual interface?
A virtual interface ensures redundant physical connectivity from a device to one or more switches, routers, or firewalls. For example, two controller ports can be connected to two L2 switches for physical redundancy of controller port connectivity.
Why does DHCP have 2 ports?
The reason TWO reserved ports are used, is to avoid ‘waking up’ and scheduling the BOOTP server daemons, when a bootreply must be broadcast to a client. Since the server and other hosts won’t be listening on the ‘BOOTP client’ port, any such incoming broadcasts will be filtered out at the kernel level.
Is DHCP UDP or TCP?
Is DHCP option 82 needed?
Some client applications can append an Option 82 field to their DHCP requests. It is not necessary for all relay agents on the path between a DHCP client and the server to support Option 82, and a relay agent without Option 82 should forward DHCP packets regardless of whether they include Option 82 fields.
What is option 43 used for in DHCP?
Option 43 function
DHCP servers and clients use Option 43 to exchange vendor-specific configuration information. The DHCP client can obtain the following information through Option 43: ACS parameters, including the ACS URL, username, and password.
Which interface is considered a dynamic interface?
An interface is considered dynamic if at least one of the layers in the interface stack is configured dynamically. In Figure 2, multiple subscribers share the same broadcast segment. Each subscriber is identified by an individual IP address or a group of subscribers can be identified with an IP network.
What interface is used by a WLC to communicate with external authentication servers?
The management interface is the default interface used to access and manage the WLC. The management interface is also used by the access points to communicate with the WLC.
What is difference between interface and virtual interface?
An interface is a bundle of signals or nets through which a testbench communicates with a design. A virtual interface is a variable that represents an interface instance.
What is the difference between static and virtual interface?
A virtual interface is a pointer to an actual interface in SystemVerilog. Physical Interface signals are static whereas classes are dynamic. Thus, physical interface is not supported in Object Oriented Programming (OOP). Virtual interface concept comes into the picture to use signals of interface.
Is DHCP a TCP or UDP?
Does DHCP run over TCP?
DHCP cannot use TCP as the transport protocol because TCP requires both end-points to have unique IP addresses. At the time a host is required to use DHCP, it does not have an IP address it can source the packets from, nor does it have the IP address of the DHCP server.
Why does DHCP use 2 ports?
Is DHCP Layer 2 or 3?
DHCP works on Layer 2 in the OSI model.
What is option 82 used for?
Option 82 is called the relay agent information option and is inserted by the DHCP relay agent when forwarding client-originated DHCP packets to a DHCP server. Servers recognizing the relay agent information option may use the information to implement IP address or other parameter assignment policies.
What is the difference between Option 43 and Option 60?
In summary: Option 60 defines the vendor type and configuration value. Option 43 defines vendor specific information. If option 60 is configured, the vendor specific information (defined in option 43) is returned to clients that provide the appropriate vendor type and configuration value.