Implementing LISP Host Mobility Across Subnet

Implementing LISP Host Mobility Across Subnet

In this section, West Dc has Extension Subnet 10.11.11.0/24 in VLAN 100 which is a mobile subnet and East DC has subnet 10.12.12.0/24.

Refer the below figure to get topology:

Here in this example Host or work load on West DC site will be moved to East DC site and will be connected to 10.12.12.0/24 subnet which is locally defined on East DC. A remote site is also deployed with subnet 10.10.10.0/24

Nexus 7K West DC xTR configuration:

Below Both Nexus 7k on West DC and East DC and also each command explanation has been given

Step1: Enable LISP feature which will make Nexus 7K as ETR while decapsulation LISP traffic received from L3 domain and N7K acts as ITR for encapsulating LISP traffic destined to desired location.

Step2: A global Database mapping to be configured with aggregated subnet that identifies all IP subnets deployed in specific DC. Here 10.11.0.0/16 is mapped with two RLOC IP address each with xTR1 & xTR2 at DC West. The RLOC recommendation is to use loopback IP address. Priority and weight is also configured to insure that inbound traffic can be load-balanced across both DC xTRs.

Step3: Now configuration to define IP address of Map-Servers and MP-Resolvers.  Here we have used Map-Server from Both DC and anycast IP address of MR

Step4: A Dynamic mapping of the mobile subnet is also required , Here Subnet 10.11.11.0/24 is mobile subnet under which host is moved from West Dc to East DC.

Step5: Finally LISP dynamic-eid-policy must be configured under L3 interface ( SVI of VLAN 100 )

Now below configuration also shows about East DC xTR

Now below configuration also shows about East DC xTR

Remote Site Cisco IOS-xTR configuration:

The Configuration of branch xTR is shown in below figure.