Alcatel-Lucent 7750 Configuration Manual page 535

Description This command defines the amount of time the service manager will keep the local sites in standby status,
waiting for BGP updates from remote PEs before running the DF election algorithm to decide whether the
site should be unblocked. THe timer is started when one of the following event occurs only if the site is
operationally up:
•
•
The no form of this command sets the value to 2.
Default 2 seconds
Parameters seconds — Specifies the timer, in seconds.
Values
site-min-down-timer
Syntax site-min-down-timer min-down-time
no site-min-down-timer
Context config>redundancy>bgp-multi-homing
Description This command configures the BGP multi-homing site minimum down time. When set to a non-zero value, if
the site goes operationally down it will remain operationally down for at least the length of time configured
for the site-min-down-timer, regardless of whether other state changes would have caused it to go
operationally up. This timer is restarted every time that the site transitions from up to down.
The above operation is optimized in the following circumstances:
• If the site goes down on the designated forwarder but there are no BGP multi-homing peers with the
same site in an UP state, then the site-min-down-timer is not started and is not used.
• If the site goes down on the designated forwarder but there are no active BGP multi-homing peers, then
the site-min-down-timer is not started and is not used.
• If the site-min-down-timer is active and a BGP multi-homing update is received from the designated
forwarder indicating its site has gone down, the site-min-down-timer is immediately terminated and
this PE becomes the designated forwarder if the BGP multi-homing algorithm determines it should be
the designated forwarder.
The no form of the command reverts to default value.
Default no site-min-down-timer
Parameters min-down-time — Specifies the time, in seconds, that a BGP multi-homing site remains operationally down
after a transition from up to down.
Values
Default
7750 SR Interface Configuration Guide
Manual site activation using "no shutdown" at site-id level or at member object(s) level (for
example, SAP(s) or PW(s)
Site activation after a failure
1..100
1— 100 seconds
0 seconds
Interface Configuration
Page 535