Route Preference Settings - D-Link xStack DGS-3600 User Manual

Parameter Description
Allows the entry of an IP address that will be a static entry into the Switch's Routing Table.
IP Address
Subnet Mask Allows the entry of a subnet mask corresponding to the IP address above.
Gateway IP Allows the entry of an IP address of a gateway for the IP address above.
Metric (1-65535) Allows the entry of a routing protocol metric representing the number of routers between the
Switch and the IP address above.
Backup State The user may choose between Primary and Backup. If the Primary Static/Default Route fails,
the Backup Route will support the entry. Please take note that the Primary and Backup entries
cannot have the same Gateway.
Click Apply to implement changes made.

Route Preference Settings

Route Preference is a way for routers to select the best path when there are two or more different routes to the same destination
from two different routing protocols. The majority of routing protocols are not compatible when used in conjunction with each
other. This Switch supports and may be configured for many routing protocols, as a stand-alone switch or more importantly, in
utilizing the stacking function and Single IP Management of the Switch. Therefore, the ability to exchange route information and
select the best path is essential to optimal use of the Switch and its capabilities.
The first decision the Switch will make in selecting the best path is to consult the Route Preference Settings table of the switch.
This table can be viewed by clicking Configuration > L3 IP Networking > Route Preference Settings, and it holds the list of
possible routing protocols currently implemented on the Switch, along with a Preference value which determines which routing
protocol will be the most dependable to route packets. Below is a list of the default route preferences set on the Switch.
Route Type
Local
Static
OSPF Intra
OSPF Inter
RIP
OSPF ExtT1
OSPF ExtT2
As shown above, Local will always be the first choice for routing purposes and the next most reliable path is Static due to the fact
that its has the next lowest value. To set a higher reliability for a route, change its value to a number less than the value of a route
preference that has a greater reliability value using the New Route Preference Settings window command. For example, if the
user wishes to make RIP the most reliable route, the user can change its value to one that is less than the lowest value (Static - 60)
or the user could change the other route values to more than 100.
The user should be aware of three points before configuring the route preference:
1. No two route preference values can be the same. Entering the same route preference may cause the Switch to crash due
to indecision by the Switch.
2. If the user is not fully aware of all the features and functions of the routing protocols on the Switch, a change in the
default route preference value may cause routing loops or black holes.
xStack DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch
Validity Range
0 - Permanently set on the Switch and not configurable.
1 - 999
1 - 999
1 - 999
1 - 999
1 - 999
1 - 999
116
Default Value
0
60
80
90
100
110
115