GE D60 Instruction Manual page 213

CHAPTER 5: SETTINGS
Configure the network IP and subnet settings before configuring the routing settings.
Add and delete static routes
Host routes are not supported at present.
The routing table configuration is available on the serial port and front panel. This is a deliberate decision, to avoid loss of
connectivity when remotely configuring the D60.
By default, the value of the destination field is 127.0.0.1 for all static routes (1 to 6). This is equivalent to saying that the
static routes are not configured. When the destination address is 127.0.0.1, the mask and gateway also must be kept on
default values.
By default, the value of the route gateway address is 127.0.0.1. This means that the default route is not configured.
To add a route:
1. Use any of the static network route entries numbered 1 to 6 to configure a static network route. Once a route
destination is configured for any of the entries 1 to 6, that entry becomes a static route and it must meet all the rules
listed in the next section, General Conditions to be Satisfied by Static Routes.
2. To configure the default route, enter a default gateway address. Once a default gateway address is configured, it
must be validated against condition 2 of the General Conditions to be Satisfied by Static Routes, where the route
gateway must be on a connected network.
To delete a route:
1. Replace the route destination with the default loopback address of 127.0.0.1. When deleting a route, the mask and
gateway also must be brought back to default values.
2. Delete the default route by replacing the default gateway with the default value of 127.0.0.1.
General conditions to be satisfied by static routes
The following rules are validated internally:
• The route mask has IP mask format. In binary this needs to be a set of contiguous bits of 1 from left to right, followed
by one or more contiguous bits of 0.
• The route destination and mask must match. This can be verified by checking that
RtDestination and RtMask = RtDestination
Example of good configuration: RtDestination = 10.1.1.0; Rt Mask = 255.255.255.0
Example of bad configuration: RtDestination = 10.1.1.1; Rt Mask = 255.255.255.0
The following rules must be observed when you configure static routes:
• The route destination must not be a connected network
• The route gateway must be on a connected network. This rule applies to the gateway address of the default route as
well. This can be verified by checking that:
(RtGwy & Prt1Mask) == (Prt1IP & Prt1Mask) || (RtGwy & Prt2Mask) == (Prt2IP & Prt2Mask) || (RtGwy & Prt3Mask) == (Prt3IP
& Prt3Mask)
where
& is the bitwise-AND operator
== is the equality operator
|| is the logical OR operator
D60 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
RT1 NET MASK:

255.0.0.0
RT1 GATEWAY:

127.0.0.1
Range: standard IPV4 subnet mask format
Range: standard IPV4 unicast address format
PRODUCT SETUP
5
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