Hello,
I try to test with configuring Multihoming on the PE Router for VPLS.
PE1:
routing-instances {
VPLS-TESTING {
instance-type vpls;
vlan-id 782;
interface xe-0/0/1.782;
vrf-target target:111:111;
protocols {
vpls {
site SITE1 {
site-identifier 2;
multi-homing;
site-preference primary;
interface xe-0/0/1.782;
}
}
}
}
}
PE2:
routing-instances {
VPLS-TESTING {
instance-type vpls;
vlan-id 782;
interface ae4.782;
vrf-target target:111:111;
protocols {
vpls {
site SITE1-BKUP {
site-identifier 2;
multi-homing;
site-preference backup;
interface ae4.782;
}
}
}
}
}
i have tested without including multi-homing statement, the primary and backup site still work well. The RR will chose the routes of primary site because its local preference is higher than backup site. So, the question is wheather i should include multi-homing statement or not ?
i have read the information on https://www.juniper.net/documentation/en_US/junos/topics/usage-guidelines/vpns-configuring-vpls-multihoming.html :
When a CE device is connected to the same VPLS site on more than one PE router, include the multi-homing statement on all associated PE routers. Configuration of this statement tracks BGP peers. If no BGP peer is available, VPLS deactivates all active interfaces for a site.
But i acctually dont understand its function !
Thanks for any answer !