Configurable Parameters and Defaults

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109



A P P E N D I X A

In Routing and RAS Admin, you can configure global settings (such as parameters for
RIP for IP) or interface
-
specific settings (such as parameters for a RIP for IP interface).
To determine the proper values f
or these settings, research your network configuration
prior to installing and configuring Routing and Remote Access Service.

IP Global and Interface Parameters

Depending on what routing protocols you add to IP, you can configure global and per
-
interface s
ettings for IP, OSPF, RIP for IP, and DHCP Relay Agent. The rest of this
appendix shows the parameters that are available for you to configure and the defaults
with which they are installed.

IP Global Parameters

You determine preference levels for the IP p
rotocol by configuring global settings.



To configure IP global settings


1.

Under
IP Routing
, right
-
click
Summary
.


2.

Click
Configure IP parameters
.


3.

Set the preference level for IP protocols on the
Preference Levels

tab.


If two routes exist to the

same destination, then the route that is learned by the
protocol with the smaller number is preferred over the route that is learned by the
protocol with the higher number. See Table A.1 for preference level defaults.

Configurable Parameters and
Defaults

110

Administrator’s Guide



Table A.1 Preference Levels

Routin
g protocol

Default


Static routes

1

SNMP routes

2

OSPF

3

RIP version 2 for IP

4


IP Interface Parameters

You can configure per
-
interface settings for the IP protocol such as setting route
discovery advertisements and configuring packet filters.



To
configure IP interface settings


1.

Under
IP Routing
, click
Summary
.


2.

Right
-
click an interface.


3.

Click
Configure interface
.


Router discovery advertisements are disabled by default when you install Routing and
Remote Access Service. Table A.2 shows d
efaults of configurable parameters.

Table A.2 IP Interface Parameters

Parameter

Default


Level of preference

0

Advertisement rate

10 seconds

Advertisement lifetime

30 seconds


Packet filters are disabled by default. Packet filters are set by excepti
on and can be
configured to allow or deny those packets that you specify. Use the following criteria
to define a filter:



IP source and destination address



TCP source and destination port



UDP source and destination port



ICMP type and code



IP proto
col identifier




Appendix A
Configurable Parameters and Defaults

111


OSPF by Bay Networks Global Parameters

OSPF is a complex protocol and should be configured by network administrators
experienced in enterprise networking. Many OSPF parameters can be set to defaults as
recommended by Microsoft and Bay Netw
orks. However, setting other defaults
requires knowledge of your network configuration.



To configure OSPF global settings


1.

Under
IP Routing
, right
-
click
OSPF by Bay Networks
.


2.

Click
Configure OSPF
.


To set the router identification number, in the
OSPF Configuration
dialog box click the
General

tab.

OSPF requires that each router have a unique router identification number. Routing and

Remote Access Service assigns the IP address of the first LAN adapter bound by
Windows NT as the default OSPF route
r identification number. This assumes that your
static or DHCP
-
assigned IP addresses are unique within your network. If your network
uses a different scheme for assigning OSPF router identifications, make sure to write
down the configuration for reference
purposes.

On the
Areas

tab, you can see that OSPF installs the backbone area, 0.0.0.0, as the only

configured area for the router. To add other areas, click
Add
.

OSPF is installed with no virtual interfaces. If your network uses OSPF virtual
interfaces, co
nfigure virtual interfaces after installation on the
Virtual Interfaces

tab.

OSPF by Bay Networks Interface Parameters

The parameters and defaults listed in this section apply to OSPF LAN interfaces and
OSPF demand
-
dial interfaces. Configure these paramete
rs after installation by using the

General
,
Neighbors
, and

Advanced

tabs in the
OSPF Configuration
dialog box. You
can also configure area ID, authentication password, and non
-
broadcast multiple
access (NBMA) neighbors.



To configure OSPF interface settin
gs


1.

Under
IP Routing
, click
OSPF by Bay Networks
.


2.

Right
-
click an interface.


3.

Click
Configure interface
.

By default, OSPF is disabled on a new interface.


112

Administrator’s Guide




Table A.3 shows the defaults for LAN interfaces.

Table A.3 OSPF LAN Interface Parameters

Parameter

Default


Transit delay

1 second

Retransmit interval

5 seconds

Hello interval

10 seconds

Dead interval

40 seconds

Poll interval

120 seconds

MTU size

1500 bytes

Router priority

1

Cost

2

Type

Broadcast


Table A.4 shows the defaults for po
int
-
to
-
point interfaces.

Table A.4 OSPF Point
-
to
-
Point Interface Parameters

Parameter

Default


Transit delay

1 second

Retransmit interval

10 seconds

Hello interval

15 seconds

Dead interval

60 seconds

Poll interval

120 seconds

MTU size

1500 bytes

Router priority

1

Cost

4

Type

Point
-
to
-
point




Appendix A
Configurable Parameters and Defaults

113


RIP for IP Global Parameters

You can configure global settings for the RIP for IP protocol such as setting the update

rate and route filters.



To configure RIP for IP global settings


1.

Under
IP Routing
,
right
-
click
RIP for Internet Protocol
.


2.

Click
Configure RIP
.


In the
RIP for IP Configuration

dialog box:



On the
General

tab, the default minimum
-
triggered
-
update rate is 5 seconds for
both LAN and demand
-
dial interfaces.



On the
Security

tab, you can se
t route filters to permit or deny announcements
from routers that you add to the
Routers

box.

RIP for IP Interface Parameters

The parameters and defaults listed in this section apply to RIP for IP LAN interfaces
and RIP for IP demand
-
dial interfaces. Confi
gure these parameters after installation by
using the
General
,
Security
,
Neighbors
, and

Advanced

tabs in the
RIP Configuration
dialog box.



To configure RIP for IP interface settings


1.

Under
IP Routing
, click
RIP for Internet Protocol
.


2.

Right
-
click a
n interface.


3.

Click
Configure interface
.


Table A.5 shows the defaults for LAN interfaces.

Table A.5 RIP for IP LAN Interface Parameters

Parameter

Default


Operation mode

Periodic Update

Outgoing packet protocol

RIP version 1 broadcast

Incoming pa
cket protocol

RIP versions 1 and 2

Added cost for interface

1


(continued)


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Administrator’s Guide




Parameter

Default


Tag

0

Authentication

Disabled

Periodic announcements

30 seconds

Route expiration

180 seconds

Route removal time

120 seconds

Split horizon

Enabled

Poison reverse

Enabled

Triggered updates

Enabled

Clean up when stopping

Enabled


Table A.6 shows the defaults for demand
-
dial interfaces.

Table A.6 RIP for IP Demand
-
Dial Interface Parameters

Parameter

Default


Operation mode

Autostatic

Outgoing packet protocol

RIP version 2
multicast

Incoming packet protocol

RIP version 2

Added cost for interface

1

Tag

0

Authentication

Disabled

Periodic announcements

30 seconds

Route expiration

180 seconds

Route removal time

120 second
s

Split horizon

Enabled

Poison reverse

Enabled

Triggered updates

Disabled

Clean up when stopping

Enabled



Appendix A
Configurable Parameters and Defaults

115


DHCP Relay Agent Global Parameters

You can configure global settings for the DHCP Relay Agent in order to configure
addresses for your DHCP serv
ers.



To configure DHCP Relay Agent global settings


1.

Under
IP Routing
, right
-
click
DHCP Relay Agent
.


2.

Click
Configure DHCP Relay Agent
.


In the
DHCP Relay Agent Configuration

dialog box, you must configure the DHCP
server table with addresses for DH
CP servers on your network. Note the name and IP
number of the DHCP server before installing the Routing and Remote Access Service
DHCP Relay Agent.

DHCP Relay Agent Interface Parameters

You can configure per
-
interface settings for the DHCP Relay Agent suc
h as hop
-
count
and seconds
-
since
-
boot thresholds.



To configure DHCP Relay Agent interface settings


1.

Under
IP Routing
, click
DHCP Relay Agent
.


2.

Right
-
click an interface.


3.

Click
Configure interface
.


By default, the DHCP Relay Agent is enabled on
each interface with the defaults
shown in Table A.7.

Table A.7 DHCP Relay Agent Interface Parameters

Parameter

Default


Hop
-
count threshold

4

Seconds
-
since
-
boot threshold

4


The
hop
-
count threshold

is the maximum number of DHCP Relay Agents that can
forward a request. You can use this setting to prevent request packets from entering
infinite loops.

The
seconds
-
since
-
boot threshold

is the minimum time that the DHCP Relay Agent
waits before forwarding the DHCP request to the DHCP server.


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Administrator’s Guide



IPX Global and

Interface Parameters

If you have the NWLink IPX/SPX

Compatible Transport protocol installed before you
install Routing and Remote Access Service, IPX Routing is automatically installed with
these routing protocols:



IPX NetBIOS Broadcasts



RIP for IPX



SAP for IPX

You can configure global logging options for each protocol. The following sections
describe the per
-
interface parameters that you can configure for each protocol.

IPX Interface Parameters

You can configure per
-
interface settings for the IPX p
rotocol such as setting the dial
-
in
control protocol and configuring packet filters.



To configure IPX interface settings


1.

Under
IPX Routing,
click
Summary
.


2.

Right
-
click an interface.


3.

Click
Configure interface
.


In the
IPX Configuration

dialog b
ox, you can select which type of dial
-
in control
protocol you want to use on the interface: IPX Control Protocol (IPX CP) or IPX WAN.
For demand
-
dial interfaces, the demand
-
dial control protocol defaults to IPX CP.

IPX is automatically enabled on every int
erface.

Packet filters are disabled by default. Packet filters are defined by exception and can be
configured to either allow or deny all packets added to the exception list. Use the
following criteria to define a filter:



The network number, network mask
, node, and socket for the IPX source and
destination



IPX packet type




Appendix A
Configurable Parameters and Defaults

117


IPX NetBIOS Broadcast Interface Parameters

You can configure per
-
interface settings for NetBIOS broadcast in order to configure
LAN interfaces and demand
-
dial interfaces.



To config
ure IPX NetBIOS Broadcast interface settings


1.

Under
IPX Routing
, click
NetBIOS Broadcasts
.


2.

Right
-
click an interface.


3.

Click
Configure interface
.


Table A.8 shows the defaults for LAN interfaces.

Table A.8 IPX NetBIOS LAN Broadcast Interface Par
ameters

Parameter

Default


Accept broadcasts

Enabled

Deliver broadcasts

Always


Table A.9 shows the defaults for demand
-
dial interfaces.

Table A.9 IPX NetBIOS Demand
-
Dial Broadcast Interface Parameters

Parameter

Default


Accept broadcasts

Disabled

Deliver broadcasts

Never


RIP for IPX Interface Parameters

You can configure LAN and demand
-
dial interface settings for RIP for IPX.



To configure RIP for IPX interface settings


1.

Under
IPX Routing
,

click
RIP for IPX
.


2.

Right
-
click an interface.


3.

Click
Configure interface
.



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Administrator’s Guide



Table A.10 shows the defaults for LAN interfaces.

Table A.10 RIP for IPX LAN Interface Parameters

Parameter

Default


Advertise routes

Enabled

Accept route advertisements

Enabled

Update mode

Standard

Update interval

60 s
econds

Aging interval multiplier

3


Table A.11 shows the defaults for demand
-
dial interfaces.

Table A.11 RIP for IPX Demand
-
Dial Interface Parameters

Parameter

Default


Advertise routes

Enabled

Accept route advertisements

Enabled

Update mode

No upd
ate

Update interval

N/A

Aging interval multiplier

N/A

Filters can be configured on a per
-
interface basis to allow or deny RIP routes from a
network number and mask that you supply.

SAP for IPX Interface Parameters

You can configure LAN and demand
-
dial i
nterface settings for SAP for IPX.



To configure SAP for IPX interface settings


1.

Under
IPX Routing
, click
SAP for IPX
.


2.

Right
-
click an interface.


3.

Click
Configure interface
.


Table A.12 shows the defaults for LAN interfaces.



Appendix A
Configurable Parameters and Defaults

119


Table A.12 SAP for

IPX LAN Interface Parameters

Parameter

Default


Advertise services

Enabled

Accept service advertisements

Enabled

Reply to get nearest server
requests

Enabled

Update mode

Standard

Update interval

60 seconds

Aging interval multiplier

3


Table A.13 s
hows the defaults for demand
-
dial interfaces.

Table A.13 SAP for IPX Demand
-
Dial Interface Parameters

Parameter

Default


Advertise services

Enabled

Accept service advertisements

Enabled

Reply to get nearest server
requests

Enabled

Update mode

No upd
ate

Update interval

N/A

Aging interval multiplier

N/A

Filters can be configured on a per
-
interface basis to allow or deny SAP advertisements
from a service type and service name that you supply.


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Administrator’s Guide




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