Configuring GRE Keepalive Time

You can configure the keepalives on a a GRE tunnel interface by including both the keepalive-time statement and the hold-time statement at the [edit protocols oam gre-tunnel interface interface-name] hierarchy level.

Note: For proper operation of keepalives on a GRE interface, you must also include the family inet statement at the [edit interfaces interface-name unit unit] hierarchy level. If you do not include this statement, the interface is marked as down.

To configure keepalive time for a GRE tunnel interface:

1. At the [edit interfaces interface-name unit unit-number] hierarchy level, set the family as inet.
   user@host# set interfaces interface-name unit unit-number family family-name
2. Configure the Operation, Administration, and Maintenance (OAM) protocol:
   [edit]user@host# edit protocols oam
3. Configure the GRE tunnel interface:
   [edit protocols oam]user@host# edit gre-tunnel interface interface-name
4. Configure the keepalive time:
   [edit protocols oam gre-tunnel interface interface-name]user@host# set keepalive-time seconds
5. Configure the hold time, which must be at least twice the keepalive time.
   [edit protocols oam gre-tunnel interface interface-name]user@host# set hold-time seconds

Related Topics

• GRE Keepalive Time Overview
• Example: Configuring Keepalive for a GRE Interface
• keepalive-time
• hold-time