D-Link DGS-3312SR Product Manual page 140

Critical IP Address
Checking Critical IP
Auth. Type
Auth. Data
Click Apply to implement changes made.
VRRP Interface Entry Display
To view the settings for a particular VRRP setting, click the corresponding
the entry, which will display the following:
DGS-3312SR Gigabit Layer 3 Switch
router. A True entry, along with having the backup router's priority set higher than the
masters priority, will set the backup router as the Master router. A False entry will
disable the backup router from becoming the Master router. This setting must be
consistent with all routers participating within the same VRRP group. The default
setting is True.
Enter the IP address of the physical device that will provide the most direct route to
the Internet or other critical network connections from this virtual router. This must be
a real IP address of a real device on the network. If the connection from the virtual
router to this IP address fails, a new Master will be elected from the backup routers
participating in the VRRP group. If the connection to the backup fails, this backup
router cannot assume the Master router role. Different critical IP addresses may be
assigned to different routers participating in the VRRP group, and can therefore
define multiple routes to the Internet or other critical network connections.
Use the pull-down menu to enable or disable the Critical IP address entered above.
Specifies the type of authentication used. The Auth. Type must be consistent with all
routers participating within the VRRP group. The choices are:
None – Selecting this parameter indicates that VRRP protocol exchanges will not be
authenticated.
Simple – Selecting this parameter will require the user to set a simple password in the
Auth. Data field for comparing VRRP message packets received by a router. If the
two passwords are not exactly the same, the packet will be dropped.
IP – Selecting this parameter will require the user to set a MD5 message digest for
authentication in comparing VRRP messages received by the router. If the two values
are inconsistent, the packet will be dropped.
This field is only valid if the user selects Simple or IP in the Auth. Type field. Simple
will require the user to enter an alphanumeric string of no more than eight characters
to identify VRRP packets received by a router. IP will require the user to enter a MD5
message digest for authentication in comparing VRRP messages received by the
router
in the VRRP Interface Table window of
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