LevelOne GTL-2691 User Manual

Page 642

HAPTER

| Configuring Router Redundancy

Configuring VRRP Groups

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VLAN – ID of a VLAN configured with an IP interface. (Range: 1-4093;

Default: 1)

Adding a Virtual IP Address

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VLAN ID – ID of a VLAN configured with an IP interface.

(Range: 1-4093)

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VRID – VRRP group identifier. (Range: 1-255)

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IP Address – Virtual IP address for this group.
Use the IP address of a real interface on this router to make it the

master virtual router for the group. Otherwise, use the virtual address
for an existing group to make it a backup router, or to compete as the

master based on configured priority if no other members are set as the

owner of the group address.

Configuring Detailed Settings

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VLAN ID – VLAN configured with an IP interface. (Range: 1-4093)

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VRID – VRRP group identifier. (Range: 1-255)

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Advertisement Interval – Interval at which the master virtual router

sends advertisements communicating its state as the master.

(Range: 1-255 seconds; Default: 1 second)
VRRP advertisements from the current master virtual router include

information about its priority and current state as the master.
VRRP advertisements are sent to the multicast address 224.0.0.8.

Using a multicast address reduces the amount of traffic that has to be

processed by network devices that are not part of the designated VRRP

group.
If the master router stops sending advertisements, backup routers will

bid to become the master router based on priority. The dead interval

before attempting to take over as the master is three times the hello

interval plus half a second.

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Priority – The priority of this router in a VRRP group. (Range: 1-254;

Default: 100)

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The priority for the VRRP group address owner is automatically set

to 255.

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The priority for backup routers is used to determine which router

will take over as the acting master router if the current master fails.

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Preempt Mode – Allows a backup router to take over as the master

virtual router if it has a higher priority than the acting master virtual

router (i.e., a master router that is not the group’s address owner, or

another backup router that has taken over from the previous master).

(Default: Enabled)

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Preempt Delay Time – Time to wait before issuing a claim to become

the master. (Range: 0-120 seconds; 0 seconds)