LevelOne GTL-2691 User Manual

Page 643

HAPTER

| Configuring Router Redundancy

Configuring VRRP Groups

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Authentication Mode – Authentication mode used to verify VRRP

packets received from other routers. (Options: None, Simple Text;

Default: None)
If simple text authentication is selected, then you must also enter an

authentication string.
All routers in the same VRRP group must be set to the same

authentication mode, and be configured with the same authentication

string.
Plain text authentication does not provide any real security. It is

supported only to prevent a mis-configured router from participating in

VRRP.

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Authentication String – Key used to authenticate VRRP packets

received from other routers. (Range: 1-8 alphanumeric characters)
When a VRRP packet is received from another router in the group, its

authentication string is compared to the string configured on this

router. If the strings match, the message is accepted. Otherwise, the

packet is discarded.

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State – VRRP router role. (Values: Master, Backup)

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Virtual MAC Address – Virtual MAC address for this group.

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Master Router – The primary router servicing this group.

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Master Priority – The priority of the master router.

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Master Advertisement Interval – The interval at which the master

router sends messages advertising itself as the group master.

◆

Master Down Interval – If no advertisement message is received

from the master router after this interval, backup routers will assume

that the master is dead, and will start bidding to become the group

master.

NTERFACE

To configure VRRP:

Click IP, VRRP.

Select Configure Group ID from the Step List.

Select Add from the Action List.

Enter the VRID group number, and select the VLAN (i.e., IP subnet)
which is to be serviced by this group.

Click Apply.