Part 3: Cisco SDWAN tloc extension (gre-to)
Cisco SDWAN tloc extension (gre-to)
By using a TLOC extension interface, a WAN Edge router can communicate with the adjacent WAN Edge router over the interface to use other WAN edge router ISP media. As we discuss that in our earlier article as well
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Cisco Viptela SDWAN: Part 1 TLOC extension
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As in our earlier article we discuss about tloc-extension-gre-from and now in this article we will talk about tloc-extension-gre-to
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| Fig 1.1- Cisco Viptela SDWAN TLOC |
tloc-extension-gre-to
First thing, It can only work on the IOS-XE model devices used for the SDWAN features. These models are Cisco ISRs and ASRs.
Router 1 and Router 2 are connected by a GRE tunnel over an L3 network. An MPLS network and the VPLS are connected to Router 1.There are two routers on the same site, but Router 2 has no circuits and is on a different L3 network.
When you configure you need to add one thing here
tloc-extension-gre-to <extended-interface-ip-address>
<extended-interface-ip-address>: GRE tunnel destination IP address of the interface that you are extended to another router in the branch
Sample configuration
NDNA_C8300# show sdwan running-config
sdwan
interface ge0/0.11
no shutdown
encapsulation dot1 11
ip address 10.10.10.1/24
!
interface ge0/0.12
no shutdown
encapsulation dot1 12
ip address 20.20.20.1/24
!
interface Tunnel1
no shutdown
ip unnumbered GigabitEthernet0/0.11
tunnel source GigabitEthernet0/0.11
tunnel mode sdwan
!
interface Tunnel2
no shutdown
ip unnumbered GigabitEthernet0/0.12
tunnel source GigabitEthernet0/0.12
tunnel mode sdwan
!
sdwan
interface ge0/0.11
tunnel-interface
color Private 1
tloc-extension-gre-to 30.30.30.1
!
interface ge0/0.12
tunnel-interface
color mpls
tloc-extension-gre-to 40.40.40.1
!
!
