Ericsson ECN330, User Manual

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Configuring the ECN330-switch
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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.
• 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 (that is, another backup router that has taken over from the VRRP
group address owner.) (Default: Enabled)
• Preempt Delay – Time to wait before issuing a claim to become the
master. (Range: 0-120 seconds; 0 seconds)
• Priority – The priority of this router in a VRRP group. (Range: 1-254;
Default: 100)
• The priority for the VRRP group address owner is automatically set
to 255.
• The priority for backup routers is used to determine which router will
take over as the acting master router if the current master fails.
• Authentication Type – Authentication mode used to verify VRRP
packets received from other routers. (Options: None, Simple Text)
• If simple text authentication is selected, then an authentication
string must also be entered.
• 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 misconfigured router from participating
in VRRP.
• 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.