Memory Manager And Ldp; Label Manager; Ldp Configuration - Alcatel-Lucent 7450 Manual

Ethernet service switch

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Subsystem Interrelationships

Memory Manager and LDP

LDP does not use any memory until it is instantiated. It pre-allocates some amount of fixed

memory so that initial startup actions can be performed. Memory allocation for LDP comes out of

a pool reserved for LDP that can grow dynamically as needed. Fragmentation is minimized by

allocating memory in larger chunks and managing the memory internally to LDP. When LDP is

shut down, it releases all memory allocated to it.

LDP assumes that the label manager is up and running. LDP will abort initialization if the label

manager is not running. The label manager is initialized at system boot-up; hence, anything that

causes it to fail will likely imply that the system is not functional. The router uses a dynamic label

range from values 18,432 through 262,143 (131,071 in chassis modes lower than D) to allocate all

dynamic labels, including RSVP and BGP allocated labels and VC labels.

The router uses a single consistent interface to configure all protocols and services. CLI

commands are translated to SNMP requests and are handled through an agent-LDP interface. LDP

can be instantiated or deleted through SNMP. Also, LDP targeted sessions can be set up to specific

endpoints. Targeted-session parameters are configurable.

7450 ESS MPLS Guide