Vrrp; Vrrp Global Settings - D-Link xStack DES-3800 Series User Manual

To add an entry into the DNS Relay Static Table, simply enter a Domain Name with its
corresponding IP address and click Add under the Apply heading. A successful entry will be
presented in the table below, as shown in the example above. To erase an entry from the table, click
the corresponding of the entry you wish to delete.

VRRP

VRRP or Virtual Routing Redundancy Protocol is a function on the Switch that dynamically assigns
responsibility for a virtual router to one of the VRRP routers on a LAN. The VRRP router that
controls the IP address associated with a virtual router is called the Master, and will forward packets
sent to this IP address. This will allow any Virtual Router IP address on the LAN to be used as the
default first hop router by end hosts. Utilizing VRRP, the administrator can achieve a higher available
default path cost without needing to configure every end host for dynamic routing or routing discovery
protocols.
Statically configured default routes on the LAN are prone to a single point of failure. VRRP is
designed to eliminate these failures by setting an election protocol that will assign a responsibility for
a virtual router to one of the VRRP routers on the LAN. When a virtual router fails, the election
protocol will select a virtual router with the highest priority to be the Master router on the LAN. This
retains the link and the connection is kept alive, regardless of the point of failure.
To configure VRRP for virtual routers on the Switch, an IP interface must be present on the system
and it must be a part of a VLAN. VRRP IP interfaces may be assigned to every VLAN, and therefore
IP interface, on the Switch. VRRP routers within the same VRRP group must be consistent in
configuration settings for this protocol to function optimally.

VRRP Global Settings

To enable VRRP globally on the Switch, click Layer 3 Features > VRRP > VRRP Global Settings:
The following fields can be set:
Parameter Description
VRRP State
Non-owner response
PING
Click Apply to implement changes made.
xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
Figure 8- 45. VRRP Global Settings window
Use the pull-down menu to enable or disable VRRP globally on the Switch. The
default is Disabled.
Enabling this parameter will allow the virtual IP address to be pinged from other host
end nodes to verify connectivity. This will only enable the ping connectivity check
function. This command is Disabled by default.
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