Cradlepoint COR IBR350 Manual page 64

Lease Time: [Default: 720 minutes (12 hours)] The lease time specifies how long DHCP-enabled computers will wait before requesting a new
DHCP lease. Smaller values are better suited to busy environments.
Custom Options: Input a custom DHCP option by first clicking the Custom Options field to enable it and then clicking "Add" at the top of the
table that appears. There are close to 200 possible DHCP options available. One of the more common uses is to assign a VoIP phone server using
option 66 (Server name).
• Option: Select an option from the dropdown list or manually enter the number of an option. A complete list of options is available from
IANA.
• Value: Generally this field should be a string, IP address, or numeric value. Some fields can accept both IP addresses and hostnames – in
these cases you may need to wrap this value in quotes. For example, option 66 (Server name) requires quotes around IP addresses.
DHCP Relay: DHCP Relay communicates with a DHCP server and acts as a proxy for DHCP broadcast messages that must be routed to remote
segments. This is accomplished by converting broadcast DHCP messages to unicast messages to communicate between clients and servers.
DHCP Server Address: An optional DHCP server address if more than one DHCP server is located on the network. This field is only available
when DHCP Relay is enabled.
IPv6 Addressing Address Configuration Mode: Select from the following dropdown options:
• SLAAC Only – SLAAC
network prefix and routing information, allowing clients to autogenerate an address and start communicating on the network. Clients utilize
neighbor discovery protocols to ensure multiple clients on the subnet have not chosen an identical address.
• SLAAC with DHCP – (Default) IPv6 DHCP provides an additional client configuration method and is regularly combined with SLAAC to
provide DNS servers (a shortcoming in the original SLAAC specification) and additional options not supported by SLAAC. By defaulting to
SLAAC with DHCPv6, all IPv6-capable clients on the network should be configurable with IPv6 connectivity.
– DHCP Range Start: The beginning of the range that will be used for IPV6 DHCP addresses. The IPv6 range will always start at 1.
– DHCP Range End: The ending IP address in the DHCP Server range is the end of the reserved pool of IP addresses that will be given
to any DHCP-enabled computers on your network.
– IPv6 DHCP Lease Time: This specifies how long DHCP-enabled computers will wait before requesting a new DHCP lease.
• Disable SLAAC and DHCP – Disable both IPv6 address configuration modes.
Multicast Proxy IGMP (Internet Group Management Protocol) multicast proxy allows a single packet to reroute to multiple destinations (see the
Wikipedia explanation of multicast). This may be used for IPTV, for example.
Multicast Proxy: Select to enable IGMP proxy support to allow multicast streams to flow across this network.
Quick Leave Mode: Disable quick leave mode if it's vital that the daemon should act exactly as a real multicast client on the upstream interface.
However, disabling this function increases the risk of bandwidth saturation.
By default, enabling multicast proxy enables a multicast connection with devices within the LAN. In rare cases, additional IP address ranges need
access to the multicast streams. Click Add and input the IP Address and Netmask for an additional IP address range.
Figure 81: IPv4 DHCP Custom Options
stands for stateless address autoconfiguration. The router regularly generates a router advertisement that includes
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