MSM7xx Controllers Configuration Guide v6.4.0

DNS switch on server failure
Controls how the controller switches between servers:
• When enabled, the controller switches servers if the current server replies with a DNS server
failure message.
• When disabled, the controller switches servers if the current server does not reply to a DNS
request.
DNS switch over
Controls how the controller switches back to the primary server.
• When enabled, the controller switches back to the primary server once the primary server
becomes available again.
• When disabled, the controller switches back to the primary server only when the secondary
server becomes unavailable.
DNS interception
When enabled, the controller intercepts all DNS requests and relays them to the configured DNS
servers. DNS interception must be enabled to support:
• Redirection of users to the public access interface login page when the controller cannot resolve
the domain requested by the user. For example, if the user is using a private or local domain
as the default home page in its browser.
• Users with static IP addresses when the Allow any IP address option is enabled on the Controller
>> Public access > Access control page.
When disabled, the controller does not intercept any DNS requests, enabling devices to use a
DNS server other than the controller. To support this option, you must set Controller >>Network >
Address allocation to DHCP relay agent or Static.
NOTE: When Controller >> Network > Address allocation is set to DHCP Server the controller
always returns its own address as the DNS server.
Defining IP routes
The routing module on the controller provides the following features:
• Compliance with RFC 1812, except for multicast routing
• Supports Classless Inter Domain Routing (CIDR)
• Supports Routing Internet Protocol (RIP) versions 1 and 2 in active or passive mode.
Output from the router is sent to the appropriate logical interface based on the target address of
the traffic. Supported logical interfaces include:
• VLAN
• Untagged
• IPSec client
• PPTP client
• GRE tunnel
Configuring IP routes
To view and configure IP routes, select Controller >> Network > IP routes.
On the MSM720
60 Network configuration