Users Guide

When delay-restore port or delay-restore orphan port is enabled on an interface and the respective delay-restore timer is
running, the port is immediately brought down. This is done to comply with the behavior of VLT ports (When a normal LAG is
converted into a VLT LAG when delay-restore timer is running, the LAG is immediately brought down).
NOTE: If you want to enable delay-restore port or delay-restore orphan port on an interface, but do not want it to be
brought down, you must ensure that delay-restore timer is not running or wait for the timer to expire if it has started
already.
VLT commands
backup destination
Configures the VLT backup link for heartbeat timers.
Syntax
backup destination {ip-address | ipv6 ipv6–address} [vrf management]
[interval interval-time]
Parameters
● ip-address — Enter the IPv4 address of the backup link.
● ipv6-address — Enter the IPv6 address of the backup link.
● vrf management — (Optional) Configure the management VRF instance for the backup IPv4 or
IPv6 address.
● interval interval-time — (Optional) Enter the time in seconds to configure the heartbeat
interval.
Default Not configured
Command Mode VLT-DOMAIN
Usage
Information
The no version of this command removes the IP address from the backup link.
Example
OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# backup destination 10.16.151.110 vrf management
interval 30
OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# backup destination ipv6 1::1 vrf management interval 30
Supported
Releases
10.3.1E or later
delay-restore
Configures a time interval to delay bringing up the VLT ports after reload or peer-link restoration between the VLT peer
switches.
Syntax
delay-restore seconds
Parameters seconds — Enter a delay time, in seconds, to delay bringing up VLT ports after the VLTi link is detected,
from 1 to 1200.
Default 90 seconds
Command Mode VLT-DOMAIN
Usage
Information
Use this command to delay the system from bringing up the VLT port for a brief period to allow the
exchange of control information, such as, MAC and ARP tables between VLT peers. If the peer VLT
device was up at the time the VLTi link failed, use this command after you reload a VLT device. The no
version of this command resets the delay time to the default value.
Example
OS10(conf-vlt-1)# delay-restore 100
Virtual Link Trunking 1643