Is it possible to extend multiple segments with LISP EIDs?

[hina316]

Target segment for L2 extension between locations: Defined by Endpoint Identifier (EID). We are considering the introduction of multiple segments to be defined. After checking Cisco manuals and case studies, we can only find one that defines only the segment to which the target router of LISP is connected as the target segment. Can multiple VLAN segments be extended, for example?

[M02@rt37 · Accepted solution]

Hello @hina316 

Yes, multiple VLAN segments can be extended using LISP by defining multiple EID prefixes corresponding to each VLAN. You can configure xTRs to map these EID prefixes to their respective RLOCs. For example, you could extend VLAN 10 (10.0.10.0/24) and VLAN 20 (10.0.20.0/24) by defining these as EID prefixes and mapping them to the appropriate RLOCs on the LISP routers. This allows for the extension of multiple VLANs across locations, facilitating flexible and scalable network designs. Ensure that all necessary interfaces are configured with LISP, and verify the configuration to ensure proper EID-to-RLOC mappings.

[hina316]

Hello M02@rt37 

I would appreciate if you let me ask you one more question. 
Is this an example of xTRs configuration for the following answer?
instance-id 0
database-mapping 10.0.10.0/24 172.16.1.2
database-mapping 10.0.20.0/24 172.16.1.2

>>For example, to extend VLAN 10 (10.0.10.0/24) and VLAN 20 (10.0.20.0/24), define them as EID prefixes and map them to the >>appropriate RLOC on the LISP router.

Cisco's C8300 series on-prem and Azure cloud versions.
I plan to use LISP to extend L2.
Which pattern of connection between the on-prem L3 switch and the Router can cover multiple segments?

■Pattern 1. Router-on-a-stick (ROAS)
▼Physical connection is handled by a single LAN cable

・L3 is trunked through vlan 10 and 20 port
・Router gives vlan10.20 to sub-interface.

〇In the case of vlna10
R1(config)#interface ethernet 0/0.10
R1(config-subif)#encapsulation dot1Q 10
R1(config-subif)#ip **bleep** 10.0.10.254 255.255.255.0
R1(config-subif)#no shutdown

■Pattern 2. Separate Interfaces for each VLAN
▼Physical connection is handled with two LAN cables.

・L3 creates vlan10 and 20 with access port.
・Router prepares IFs for vlan 10 and 20

〇In the case of vlan10
R1(config)#interface ethernet 0/0/1
R1(config-if)#ip address10.0.10.254 255.255.255.0
R1(config-if)#no shutdown

〇In the case of VLNA20
R1(config)#interface ethernet 0/0/2
R1(config-if)#ip address 10.0.20.254 255.255.255.0
R1(configf-if)#no shutdown