Administrator Guide

Setting VRRP Initialization Delay
When configured, VRRP is enabled immediately upon system reload or boot. You can delay VRRP initialization to allow the IGP
and EGP protocols to be enabled prior to selecting the VRRP Master. This delay ensures that VRRP initializes with no errors or
conflicts. You can configure the delay for up to 15 minutes, after which VRRP enables normally.
NOTE: When you reload a node that contains VRRP configuration and is enabled for VLT, Dell Networking recommends
that you configure the reload timer by using the vrrp delay reload command to ensure that VRRP is functional.
Otherwise, when you reload a VLT node configured for VRRP, the local destination address is not seen on the reloaded
node causing suboptimal routing.
Set the delay timer on individual interfaces. The delay timer is supported on all physical interfaces, VLANs, and LAGs.
When you configure both CLIs, the later timer rules VRRP enabling. For example, if you set vrrp delay reload 600 and
vrrp delay minimum 300, the following behavior occurs:
● When the system reloads, VRRP waits 600 seconds (10 minutes) to bring up VRRP on all interfaces that are up and
configured for VRRP.
● When an interface comes up and becomes operational, the system waits 300 seconds (5 minutes) to bring up VRRP on that
interface.
To set the delay time for VRRP initialization, use the following commands.
● Set the delay time for VRRP initialization on an individual interface.
INTERFACE mode
vrrp delay minimum seconds
This time is the gap between an interface coming up and being operational, and VRRP enabling.
The seconds range is from 0 to 900.
The default is 0.
● Set the delay time for VRRP initialization on all the interfaces in the system configured for VRRP.
INTERFACE mode
vrrp delay reload seconds
This time is the gap between system boot up completion and VRRP enabling.
The seconds range is from 0 to 900.
The default is 0.
Track an Interface or Object
You can set Dell Networking OS to monitor the state of any interface according to the virtual group.
Each VRRP group can track up to 12 interfaces and up to 20 additional objects, which may affect the priority of the VRRP
group. If the tracked interface goes down, the VRRP group’s priority decreases by a default value of 10 (also known as cost). If
the tracked interface’s state goes up, the VRRP group’s priority increases by 10.
The lowered priority of the VRRP group may trigger an election. As the Master/Backup VRRP routers are selected based on the
VRRP group’s priority, tracking features ensure that the best VRRP router is the Master for that group. The sum of all the costs
of all the tracked interfaces must be less than the configured priority on the VRRP group. If the VRRP group is configured as
Owner router (priority 255), tracking for that group is disabled, irrespective of the state of the tracked interfaces. The priority
of the owner group always remains at 255.
For a virtual group, you can track the line-protocol state or the routing status of any of the following interfaces with the
interface interface parameter:
● For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port.
● For a 40-Gigabit Ethernet: enter fortyGigE slot/port.
● For a port extender 1-Gigabit Ethernet interface, enter the keyword peGigE then the pe-id/stack-unit /port-id information.
● For a port extender 10-Gigabit Ethernet interface, enter the keyword peTenGigE then the pe-id/stack-unit /port-id
information.
● For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.
For a virtual group, you can also track the status of a configured object (the track object-id command) by entering its
object number.
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Virtual Router Redundancy Protocol (VRRP)