Auto-sense SD-WAN Local Breakout automatically provides connectivity to devices attached to a data VRF, through the SD-WAN VRF, towards the Internet. Use a Local Breakout (LBO) configuration for the following use cases:
|
Feature |
Product |
Release introduced |
|---|---|---|
|
ExtremeCloud SD-WAN Local Breakout configuration applied through Auto-sense |
5320 Series |
Fabric Engine 9.1 Supported on 5320-48P-8XE and 5320-48T-8XE only |
|
5420 Series |
Fabric Engine 9.1 |
|
|
5520 Series |
Fabric Engine 9.1 |
|
|
5720 Series |
Fabric Engine 9.1 |
|
|
7520 Series |
Fabric Engine 9.1 |
|
|
7720 Series |
Fabric Engine 9.1 |
|
|
VSP 4900 Series |
VOSS 9.1 |
|
|
VSP 7400 Series |
VOSS 9.1 |
If you use SD-WAN Orchestrator to enable an LBO branch, Auto-sense on the switch can apply the LBO configuration to select VRFs. The switch configuration creates a BGP peering relationship with the SD-WAN Appliance in the dynamic VRF (SD-WAN), and then redistributes BGP routes it receives into the selected user-created VRFs.
This feature applies only to VRFs that exist on the same Fabric Extend switch that connects to the SD-WAN Appliance, and only for local or direct subnets on the same VRF. IS-IS does not advertise the LBO-injected routes further than the local switch. If you require LBO in the branch, make the directly-attached switch the default gateway with LBO enabled, and operate the other nodes in the branch as Layer 2 BEBs.
You must identify which user-created VRFs accept the LBO routes. Auto-sense automatically configures BGP and RIP redistribution policies between the selected VRFs and the dynamic SD-WAN VRF. For more information about how to identify a VRF, see Select a VRF for Local Breakout Configuration.
The switch uses Auto-sense to read BGP Autonomous System Number (ASN) and neighbor information from the LLDP FE TLV, and apply a dynamic configuration. Auto-sense configures BGP and RIP for route redistribution purposes for ports with Auto-sense enabled and an ExtremeCloud SD-WAN neighbor, and also enables traffic routing from user-created VRFs through the BGP router.
Auto-sense performs the following dynamic configuration:
router bgp as-4-byte enable router bgp sw_as enable router vrf sd-wan ip bgp ip bgp router-id <local_ip> #local_ip is received through LLDP ip bgp vrf-as <local_asn> #local_asn is received through LLDP no ip bgp synchronization no ip bgp auto-summary no ip bgp aggregation ip bgp neighbor <vrouter_1> #vrouter_1,2,3 are IP addresses received through LLDP ip bgp neighbor <vrouter_1> remote-as <remote_asn> #remote_asn is received through LLDP ip bgp neighbor <vrouter_1> enable exit router vrf WORD<1-16> ip rip ip rip enable ip rip redistribute bgp vrf-src sd-wan ip rip redistribute bgp enable vrf-src sd-wan sd-wan-local-breakout exit ip rip apply redistribute bgp vrf WORD<1-16> vrf-src sd-wan router vrf sd-wan ip bgp redistribute direct vrf-src WORD<1-16> ip bgp redistribute direct enable vrf-src WORD<1-16> exit ip bgp apply redistribute direct vrf sd-wan vrf-src WORD<1-16> ip more-specific-non-local-route
For dual SD-WAN Appliance and switch pairings in High Availability deployments, you must manually configure BGP peering and a routed segment between the two switches. Auto-sense does not configure this deployment.