Clients with no Response from the DHCP Server

The Clients received no response from the DHCP server insight can be accessed from the Global and Site context. This insight provides information about Wi-Fi Wi-Fi is a technology that allows electronic devices to connect to a WLAN network, mainly using the 2.4 GHz and 5 GHz radio bands. Wi-Fi can apply to products that use any 802.11 standard. clients that experience a higher than normal number of DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network.  Discover Timeout failures in the network. This insight is triggered when users connecting to the Wi-Fi network are unable to obtain IP addresses from the DHCP server. It is categorized under connectivity since the clients do not receive any response from DHCP servers. This insight displays the following information:

• Insight Summary
• Time Series Graph
• Cards

Insight Summary

The insight summary provides the following details:

• Reason—Displays the possible causes for which the failure occurred.
• Recommendation—Displays the possible recommendation against each failure to resolve the same.
• Additional Data—Displays the dynamic packet capture (PCAP) icon which allows you to download the PCAP file for offline analysis. This column will have no data if PCAP file is not captured.
• • Dynamic PCAP is only available for IAP 5.x model running on firmware version 8.7.0.0_75915 and above.
  • The PCAP file is a sample file for a single failure scenario out of all the failures that occurred in the selected time range and respective context (Global or Site). The file size is restricted to 2 MB and you can view the downloaded file through Wireshark application.
  Failures—Displays the exact number and percentage of failures that occurred against each failure reason.

Time Series Graph

The time series graph displays the number of DHCP timeout failures that occurred in the network during the selected time period. You can hover your mouse over each bar graph to see the exact number of failures.

Cards

The cards vary based on the context that you access the insight from. Click one of the cards to view further details:

Table 1: Cards Context

Cards	Context
Site	Global
Access Point	Global, Site
VLAN	Global, Site
Client	Global, Site
User Role	Global, Site

Site

Lists the number of sites with maximum number of client failures. Click the arrow to view the pictorial graph of the Most Impacted sites. Click the number displayed on the Site card, to view a detailed description of the impacted sites:

• Site—Name of the site impacted by the insight and link to the specific insight at the site context.
• Failures—Percentage of client failures.
• Total—Total number of failures in each site.
• Failed Clients—Number of failed clients in each site.

Access Point

Lists the number and the details of APs that are impacted by DHCP timeout in the network. Click the arrow to view a pictorial graph of the Most Impacted access points. Click the number displayed on the Access Point card to view the detailed description of the impacted access points:

• AP Name—Name of the access points and link to the specific insight at the AP context.
• AP MAC—MAC Media Access Control. A MAC address is a unique identifier assigned to network interfaces for communications on a network. address of the AP link to the specific insight at the AP context.
• Failures (%)—Percentage of client failures.
• Total Count—Total number of failures in each AP.
• Serial—Serial number of the AP.
• Model—Model number of the AP.
• FW Version—Version of the firmware running on each AP.
• IP—IPv4 or IPv6 address.
• Site—Name of the site where the AP resides.

Client

Lists the MAC address, name, host name, and auth ID of clients that were impacted by DHCP timeout. Click the arrow to view the pictorial graph of the Most Impacted clients. Click the number displayed on the Client card to view a detailed description of the impacted clients:

• Client Name—Name of the impacted client and the link to the specific insight at the client context.
• Client MAC—MAC address of the client and link to the specific insight at the client context.
• Failures (%)—Percentage of client failures.
• Device Type—Device type where the client resides.
• Total Count—Total number of failures in each client

VLAN

Lists the number and details of VLANs Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. with maximum number of client failures. Click the arrow to view a pictorial graph of the Most Impacted VLAN. Click the number displayed on the VLAN card to view the detailed description of the impacted VLANs:

• VLAN—VLAN details.
• Failures (%)—Percentage of client failures.
• Failed Clients (%)—Number and percentage of failed clients.
• Success Count—Number of total successful attempts.
• Total Clients—Number of total connected clients.

User Role

Click the arrow to view a pictorial graph of the Most Impacted users. Click the number displayed on the User Role card to view the detailed description of the impacted user roles:

• User Role—Type of user role.
• Failures—Number of failures.
• Failed Clients—Number of failed clients.
• Success Count—Number of total successful attempts.
• Total Clients—Number of total connected clients.