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Contents
This chapter contains the following sections:
LISP Delegated Database Tree (DDT) defines a large-scale distributed database of LISP Endpoint Identifier (EID) space using a DDT node. A DDT node is configured to be authoritative for some specified portion of an overall LISP EID space, as well as the set of more specific subprefixes that are delegated to other DDT nodes. It is also configured with the set of more-specific sub-prefixes that are further delegated to other DDT nodes. To delegate a sub-prefix, the “parent” DDT node is configured with the Routing Locators (RLOCs) of each child DDT node that is authoritative for the sub-prefix. Each RLOC either points to a map server (sometimes termed a “terminal DDT node”) to which an egress tunnel routers (ETRs) registers that sub-prefix or points to another.
The following restriction applies to the LISP Delegate Database Tree (DDT) feature:
Configuration Examples for LISP Delegate Database Tree (DDT)
Switch(config)# lisp ddt authoritative-prefix instance-id 223 10.0.0.0/8 Switch(config)# lisp ddt child 192.168.1.100 instance-id 223 eid-prefix 10.0.0.0/12 Switch(config)# lisp ddt child 192.168.1.200 instance-id 223 eid-prefix 10.16.0.0/12
The following example defines the delegation of the EID-prefix 10.0.0.0/12 to a DDT Map Server with RLOC 192.168.1.100 and delegation of the EID-prefix 10.16.0.0/12 to a DDT Map-Server with RLOC 192.168.1.200. The child DDT Map-Server for 10.16.0.0/12 is further configured to allow ETRs to register the sub-prefixes 10.18.0.0/16 and 10.17.0.0/16:
Switch(config)# lisp ddt authoritative-prefix instance-id 223 eid-prefix 10.16.0.0/12 Switch(config)# lisp site site-1 Switch(config)# eid-prefix 10.18.0.0/16 instance-id 223 Switch(config)# lisp site site-2 Switch(config)# eid-prefix 10.17.0.0/16 instance-id 223
Feature Name |
Releases |
Feature Information |
---|---|---|
Locator/ID Separation Protocol (LISP) Delegate Database Tree (DDT) |
6.2(2) |
This feature is introduced. |