per-evi
Syntax
per-evi;Hierarchy Level
[edit interfaces interface-name esi df-election-granularity],
[edit interfaces interface-name unit logical-unit-number esi df-election-granularity]
Description
Enable the designated forwarder (DF) election granularity to support Ethernet segment ID (ESI) at the EVPN instance (EVI) level.
You can configure multiple access interfaces to support ESI at the EVI level between a
multihomed customer edge (CE) device and its multihoming provider edge (PE) peer. When
you configure the access interfaces in the same EVI with the same ESI and the
per-evi statement, these interfaces will share the same designated
forwarder (DF) election role. They will transition to the backup designated forwarder
(BDF) role only if all the access interfaces within the EVI fail. This configuration
avoids traffic disruptions caused by role changes due to a single interface failure in
the EVI.
To enable the ESI at the EVI level support:
-
Configure a unique ESI at the EVI level.
-
[edit routing-instances routing-instance-name protocols evpn esi]
-
-
Configure the access logical interfaces (IFLs) with the same ESI value as the EVI.
-
[edit interfaces interface-name unit logical-unit-number esi]
Note:Different IFLs under different physical interfaces (IFDs) can have the same ESI configured, but they must be part of the same bridge domain.
-
-
Configure the IFLs with the df-election-granularity option
per-evi. -
Configure the IFLs with the
esi single-activeoption. -
Configure the IFLs with the df-election-type option
mod.Note:If you configure the the
df-election-granularityper-evioption, you must also configure the df-election-typemodoption without configuring adf-election-type preferenceoption to prevent an error when committing the configuration.
The following shows snippets from a sample configuration:
user@MX960> show configuration interfaces
ge-0/0/1 {
vlan-tagging;
encapsulation flexible-ethernet-services;
unit 0 {
encapsulation vlan-bridge;
vlan-id 100;
esi {
00:11:11:11:11:11:11:11:11:11;
single-active;
df-election-granularity {
per-evi;
}
df-election-type {
mod;
}
}
}
}
ge-0/0/2 {
vlan-tagging;
encapsulation flexible-ethernet-services;
unit 0 {
encapsulation vlan-bridge;
vlan-id 100;
esi {
00:11:11:11:11:11:11:11:11:11;
single-active;
df-election-granularity {
per-evi;
}
df-election-type {
mod;
}
}
}
}
user@MX960> show configuration routing-instances
EVPN {
instance-type evpn;
protocols {
evpn {
esi {
00:11:11:11:11:11:11:11:11:11;
}
}
}
vlan-id 100;
interface ge-0/0/1.0;
interface ge-0/0/2.0;
route-distinguisher 10.255.0.1:100;
vrf-target target:100:100;
}
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 24.2R1