Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual do Utilizador descarregar pdf (Página 223)

Site Manager Parameters

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A-47

Parameter: Zero Subnet Enable

Path: Configuration Manager > Protocols > IP > Global

Default: Disable

Options: Enable

Disable

Function: Specifies whether an interface address whose subnet portion is all zeros or all

ones should be declared legal or not. If you set this parameter to Enable, then

you can configure IP interfaces with a subnet ID of zero. Setting this parameter

to Disable prevents you from doing so.

Instructions: Accept the default, Disable, if you do not have any interfaces that have a zero

subnet ID. Otherwise, reset this parameter to Enable. 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

Parameter: Estimated Networks

Path: Configuration Manager > Protocols > IP > Global

Default: 0

Options: 0 to 2,147,483,647

Function: Allows the IP software to preallocate system resources based on the anticipated

size of the routing table. Preallocation of memory increases the speed with

which IP software can learn routes because it removes the overhead caused by

dynamic memory allocation. Preallocation also makes better use of memory

and reduces the amount of memory required.

Instructions: Set to the number of networks (including unique subnets) that you expect.

Avoid using a number that is excessively large. This will cause a wasteful

overallocation of memory. If you use the default value, 0, IP software

preallocates memory for 500 routing table entries.

MIB Object ID: 1.3.6.1.4.1.18.3.5.3.2.1.1.11

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Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual do Utilizador Página 223