APPENDIX: Fabrics with Overlay Loopback Usage Before June 20, 2024, Deployed
This chapter is only valid for campus fabrics deployed before June 20, 2024, and that use the overlay loopback IP address approach.
When using a campus fabric deployed before June 20, 2024, the configuration to propagate the loopback address host routes is not automatically added by Juniper Mist cloud. In this case, you can simply use Additional CLI Commands as shown in the example. In the case of an IP Clos fabric where the VRFs are located on the access switch, use the following configuration statements on every access switch, adapting the names of the example VRFs.
set groups top policy-options prefix-list irb_networks apply-path "interfaces irb unit <*> family inet address <*>" set groups top policy-options prefix-list loopbacks apply-path "interfaces lo0 unit <*> family inet address <*>" set groups top policy-options policy-statement EXPORT-T5-ROUTES term TERM_LO from protocol direct set groups top policy-options policy-statement EXPORT-T5-ROUTES term TERM_LO from prefix-list loopbacks set groups top policy-options policy-statement EXPORT-T5-ROUTES term TERM_LO then accept set groups top policy-options policy-statement EXPORT-T5-ROUTES term TERM_IRB from protocol direct set groups top policy-options policy-statement EXPORT-T5-ROUTES term TERM_IRB from prefix-list irb_networks set groups top policy-options policy-statement EXPORT-T5-ROUTES term TERM_IRB then accept set groups top routing-instances customera protocols evpn ip-prefix-routes export EXPORT-T5-ROUTES set groups top routing-instances customerb protocols evpn ip-prefix-routes export EXPORT-T5-ROUTES set groups top routing-instances devices protocols evpn ip-prefix-routes export EXPORT-T5-ROUTES
On the service block functions where you make the integration of the WAN router, you need to repeat the above and depending on the protocol towards the WAN router also add the following configuration:
set groups top policy-options policy-statement EXPORT-T5-ROUTES term TERM_BGP from protocol bgp set groups top policy-options policy-statement EXPORT-T5-ROUTES term TERM_BGP then accept
When using OSPF, use the following statements instead:
set groups top policy-options policy-statement EXPORT-T5-ROUTES term TERM_OSPF from protocol ospf set groups top policy-options policy-statement EXPORT-T5-ROUTES term TERM_OSPF then accept