Alcatel-Lucent 6850-48 Guida Di Rete
Configuring VRRP
Interaction With Other Features
OmniSwitch AOS Release 6 Network Configuration Guide
September 2009
page 32-9
VRRP Startup Delay
When a virtual router reboots and becomes master, it may become master before its routing tables are
populated. This could result in loss of connectivity to the router. To prevent the loss in connectivity, a
delay is used to prevent the router from becoming master before the routing tables are stabilized; the
default delay value is 45 seconds.
populated. This could result in loss of connectivity to the router. To prevent the loss in connectivity, a
delay is used to prevent the router from becoming master before the routing tables are stabilized; the
default delay value is 45 seconds.
The startup delay may be modified to allow more or less time for the router to stabilize its routing tables.
In addition to the startup delay, the switch has an ARP delay (which is not configurable).
VRRP Tracking
A virtual router’s priority may be conditionally modified to prevent another router from taking over as
master. Tracking policies are used to conditionally modify the priority setting whenever a slot/port, IP
address and or IP interface associated with a virtual router goes down.
master. Tracking policies are used to conditionally modify the priority setting whenever a slot/port, IP
address and or IP interface associated with a virtual router goes down.
A tracking policy consists of a tracking ID, the value
used to decrease the priority value, and the slot/port
number, IP address, or IP interface name to be monitored by the policy. The policy is then associated with
one or more virtual routers.
one or more virtual routers.
Configuring Collective Management Functionality
This feature provides user with the flexibility to manage the virtual routers on the switch collectively and
also the capability to group the virtual routers to a virtual router group which simplifies the configuration
and management tasks.
also the capability to group the virtual routers to a virtual router group which simplifies the configuration
and management tasks.
You can change the default values of the parameters like advertising interval, priority, preempt mode and
the administrative status of all the virtual routers on a switch or in a virtual router group using this collec-
tive management functionality feature. For more information about configuring collective management
functionality, see
the administrative status of all the virtual routers on a switch or in a virtual router group using this collec-
tive management functionality feature. For more information about configuring collective management
functionality, see
Note. VRRP3 does not support the collective management functionality in this release.
Interaction With Other Features
• IP routing—IP routing must be enabled for the VRRP configuration to take effect.
• Router Discovery Protocol (RDP)—If RDP is enabled on the switch, and VRRP is enabled, RDP will
advertise VLAN IP addresses of virtual routers depending on whether there are virtual routers active on
the LAN, and whether those routers are backups or masters. When there are no virtual routers active on
the VLAN (either acting as master or backup), RDP will advertise all VLAN IP addresses. However, if
virtual routers are active, RDP will advertise IP addresses for any master routers; RDP will not adver-
tise IP addresses for backup routers.
the LAN, and whether those routers are backups or masters. When there are no virtual routers active on
the VLAN (either acting as master or backup), RDP will advertise all VLAN IP addresses. However, if
virtual routers are active, RDP will advertise IP addresses for any master routers; RDP will not adver-
tise IP addresses for backup routers.
For more information about RDP, see