deterministic-port-block-allocation
Syntax
deterministic-port-block-allocation {
block-size block-size;
include-boundary-addresses;
}
Description
Configure algorithm-based allocation of blocks of destination ports. By specifying this method, you ensure that an incoming (source) IP address and port always map to the same destination IP address and port block, thus eliminating the need for logging address translations.
Options
block-size—Maximum number of ports that can be allocated to a user.
If block-size is configured as zero, the method for computing
the block size is as follows:
block-size = int(65412/ceil[(Number of subscribers/Number of IP addresses in the NAT pool)]).
where
64512 is derived from (65535 - 1023) because the regular port assignments start from 1024.
Number of subscribers is derived from the from clause of the applicable NAT rule.
Default: 256
Range: 0 through 32,000
include-boundary-addresses—(Optional) Specifies
that the lowest and highest addresses (the network and broadcast addresses)
in the source address range of a NAT rule should be translated when
the NAT pool is used. If the source address has a prefix of /32, the
lowest and highest address are automatically translated.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 12.1.