
Configuring IP, ARP, RARP, RIP, and OSPF Services
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308627-14.20 Rev 00
Parameter: Zero Subnet Enable
Path: Configuration Manager > Protocols > IP > Global
Default: Disable
Options: Enable
|
Disable
|
RIP1onASB
Function: Specifies whether an interface address whose subnet portion is either all zeros
or all ones is allowed (Enable or RIP1onASB) or not (Disable). The difference
between setting this parameter to Enable or RIP1onASB is that RIP1onASB
allows the router to broadcast RIP 1 updates. If this parameter is set to Enable,
the router interprets the subnet as an all subnets broadcast (ASB) and does not
broadcast RIP 1 on interfaces with subnets of either all zeros or all ones.
Instructions: Accept the default, Disable, if your configuration does not have any interfaces
with a subnet of all zeros or all ones. You can choose either Enable or
RIP1onASB if there are subnets with all zeros or all ones. However, the use of
all-zero subnet addresses is discouraged for the following reason: if an all-zero
subnet address and an all-zero broadcast address are both valid, the router
cannot distinguish an all-subnets broadcast from a directed broadcast for the
zero subnet.
MIB Object ID: 1.3.6.1.4.1.18.3.5.3.2.1.1.10
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