IPX Set SAP-Update-Interval

IPX uses the Service Advertising Protocol (SAP) to exchange information about available services on a NetWare network. Service-providing nodes, such as file servers and print servers, use SAP to advertise their services and addresses.

Routers use SAP to create and maintain a database of services available on the internetwork.

Set SAP Update Interval specifies how often the router broadcasts server information table updates to other IPX servers.

  1. Select an interface number.

  2. Select the Submit button.

  3. Enter a SAP timer value

    This value is the SAP update interval time.

    Valid Values: The range is from 1 to 1440 minutes.

    Default Value: 1 minute.

Note that you must submit the interface and then the SAP timer value in two separate steps.

Select the Submit button.


IPX Set Split-Horizon Disabled

Split-horizon is a method of routing that avoids broadcasting RIP and SAP updates to the router from which they were learned.

In general, you should not disable split-horizon. It prevents the interface from rebroadcasting information that the receiving router already knows and it avoids unnecessary RIP and SAP advertisements. However, in the following cases you may need to disable split-horizon:

In partially-meshed networks, the routers at the branches cannot communicate with each other unless the router at headquarters broadcasts all routing information to all other routers. In this case, split-horizon should be disabled on the frame-relay interface at headquarters, and enabled at each of the branches to keep them from generating unnecessary traffic

Select an interface number.

Select the Submit button.


IPX Set Split-Horizon Heuristic

Specifies heuristic as the type of split-horizon on the specified interface. Heuristic enables split-horizon on all types of interfaces except frame-relay. For frame-relay, split-horizon is enabled only if the specified interface has exactly one PVC defined; otherwise split-horizon is disabled.

Split-horizon is a method of routing that avoids broadcasting RIP and SAP updates to the router from which they were learned.

Generally, split-horizon should be enabled on every interface to avoid unnecessary RIP and SAP advertisements. However, there are some cases where you may want to disable split-horizon:.

In partially-meshed networks, the routers at the branches cannot communicate with each other unless the router at headquarters broadcasts all routing information to all other routers. In this case, split-horizon should be disabled on the frame-relay interface at headquarters, and enabled at each of the branches to keep them from generating unnecessary traffic.

Select an interface number.

Select the Submit button.


IPX Set Split-Horizon Enabled

Enables split-horizon on the interface you specify.

Split-horizon is a method of routing that avoids broadcasting RIP and SAP updates to the router from which they were learned.

Generally, split-horizon should be enabled on every interface to prevent packets from counting to infinity and to avoid unnecessary RIP and SAP advertisements. However, there are some cases, such as partially-meshed frame-relay and X.25 configurations, where it may be necessary to disable split-horizon.

A partially-meshed RFC 1483-supported IPX routing configuration is another case where it may be necessary to disable split-horizon.

In a partially-meshed frame-relay network, the routers at the branches cannot communicate with each other unless the router at headquarters broadcasts all routing information to all other routers. In this case, split-horizon should be disabled on the frame-relay interface at headquarters, and enabled at each of the branches to keep them from generating unnecessary traffic.

Select an interface number.

Select the Submit button.


IPX Add Filter

This parameter adds global IPX filters (access controls) to your IPX configuration to determine whether the router drops or forwards IPX packets, and adds global SAP filters to determine which SAP service advertisements are ignored or accepted by the router.

Adding a filter prevents NetWare boundary overflows for users on large networks by enabling you to determine the number of hops reasonable for a given service.

The SAP filters are a global ordered list of filter entries. For each entry, enter:

Select the Submit button.


IPX Add Access-Control

Access controls are used to drop or forward packets based on their source and destination network addresses, node addresses, and socket numbers.

Global IPX filters are applied to all IPX interfaces. They can be used to prevent the router from forwarding packets based on IPX addresses (network/host/socket). You can use global IPX filters to provide security or to stop the forwarding of packets from "noisy" applications beyond the area of interest.

Global IPX filters are based on the originating IPX source address and the ultimate destination IPX address. Intermediate hop addresses are not important.

An IPX address (source or destination) for a global filter consists of an IPX network number, an IPX host number, and a range of IPX socket numbers that are specified in hexadecimal. The network number and host number can be specified as 0, which is a wildcard that matches all network and host numbers, respectively. A range of 0 to FFFF is a wildcard for sockets.

The global filter list is an ordered list of entries. Each global filter entry can be configured as inclusive or exclusive. The router compares packets it receives against the global filter list.

When creating global filter lists, consider the following things about IPX:

Note: The global filters and interface filters are mutually-exclusive. If global SAP filtering is enabled, interface SAP filters cannot be enabled (and vice-versa). If global IPX filtering is enabled (access-controls), interface IPX filters cannot be enabled (and vice-versa).

The router examines each IPX frame to see if it matches an entry in the global filter list. It applies the first match. Therefore the order of global filters is critical.

Note: It is not necessary to use access controls and SAP filters for IPX to work in a NetWare environment.

The access control list is an ordered set of entries that the router uses to filter packets.

Enter the following information:

  1. Type identifies whether packets are sent or dropped for a specific address or set of addresses.

    Select Include to cause the router to receive a packet and to forward it if it matches criteria in the remaining arguments.

    Select Exclude to cause the router to discard the packets.

  2. Destination network number is the network number of the destination, in hexadecimal.

    Valid Values: X'0000 0000' to X'FFFF FFFF'

    Zero (0) specifies all networks.

    Default Value: 0

  3. Destination host number is the host number on the destination network.

    Valid Values: X'0000 0000 0000' to X'FFFF FFFF FFFF'

    Zero (0) specifies all hosts on the network.

    Default Value: None

  4. Starting destination socket number and Ending destination socket number are two hexadecimal numbers in the range 0 to FFFF specify an inclusive range of destination sockets.

    These parameters define the socket address range of the packet's destination process. The destination socket value is used for filtering IPX packets.

    Valid Values: X'0000' to X'FFFF'

    Default Value: 0

    The valid values and default are the same for starting destination socket number and ending destination socket number.

  5. Source network number is the network number of the source, in hexadecimal.

    This parameter defines the network number of the source IPX network whose packets are filtered by this router.

    If you choose to filter on only the source network value, the filter applies to all source sockets, source networks, packet types, and number of hops.

    Valid Values: X'0000 0000' to X'FFFF FFFF'

    Zero (0) specifies all networks.

    Default Value: 0

  6. Source host number is the host number on the source network, in hexadecimal.

    Valid Values: X'0000 0000 0000' to X'FFFF FFFF FFFF'

    Zero (0) specifies all hosts on the network.

    Default Value: None

  7. Starting source socket number and Ending source socket number are two hexadecimal numbers in the range 0 to FFFF that specify an inclusive range of source sockets.

    These parameters define the socket address range of the packet's source process.

    Valid Values: X'0000' to X'FFFF'

    Default Value: 0

After you create an access-control list, enable the entries with Set Access Control. Use Move to change the order of entries.

Select the Submit button.


IPX Delete Filter

Deletes the global SAP filter you specify. You must specify it exactly as it appears in the filter list.

Enter the following:

  1. the maximum number of hops permitted for the service.

    Valid Values: 0 to 16

    Default Value: 16

  2. Service-type is the 2-byte hexadecimal number of the service class.

    Valid Values: X'0' to X' FFFF'

    Default Value: none

  3. Service-name is the name (if any) of the entry you are deleting.

    Valid Values: A string of 1 to 48 ASCII characters (X'20' through X'7E'), with the exception of the following special characters: plus (+), minus (-), comma (,), semicolon (;), colon (:), slash (/), and back slash (\).

    The question mark (?) and asterisk (*) characters serve as wildcard characters. The question mark may be used multiple times to represent any single character within the server name. The asterisk may be used multiple times to represent any portion of the server name. The question mark and asterisk may also be used together.

    Default Value: none

Select the Submit button.


IPX Delete Access-Control

Deletes the global IPX filter (access control) that matches the index number you enter.

Enter the index number of the entry you want to delete.

To see the current index numbers, display the list of entries.

Select the Submit button.


IPX Move Access-Control

Access controls are an ordered list of packet filters and are applied to incoming packets in the order they appear in the access control filter list.

You can move the filter you specify in your list of global IPX filters (access controls). The lines are then renumbered to reflect the new order. Use the displayed list to determine these index numbers:

  1. Enter the index of the control to move.

  2. Enter the record AFTER record number.

Select the Submit button.


IPX Filter-Lists Router Attach

You can attach an already-defined filter-list to a specified filter.

  1. List-name is the filter-list.

    Valid Values: Any alphanumeric string up to 16 characters

    Default Value: None

  2. Use the displayed list to determine the Filter number of the filter to which to attach the filter-list.

    To see a numbered list of the configured filters, use IPX LIST.

Select the Submit button.


IPX Filter-Lists Router Create Filter Input

In general, you should follow these steps to configure IPX interface filters:

  1. Create a filter list and give it a name, using the Create List option.

  2. Modify the filter list using the Update option and its suboptions to specify the filter criteria and whether this filter list is inclusive or exclusive.

You can now create a filter for packets received on the interface you specify.

  1. Create a filter on the desired interface using the Create Filter option, specifying whether it is an input or output filter.

  2. Enable the filter using the Enable option.

  3. Attach filter lists to the filter using the Attach option.

  4. Set the default action for the filter using the Default Value option. The default action will be taken if no match is made on any of the attached filter lists.

Select the interface number to which the input filter is to be attached.

A number is automatically assigned to a filter when it is created and from that point on is used to identify the filter, so you do not have continue to specify the interface and direction (that the filter applies to incoming packets).

Select the Submit button.


IPX Filter-Lists Router Create Filter Output

In general, follow these steps to configure IPX interface filters:

  1. Create a filter list and give it a name, using the Create List option.

  2. Modify the filter list using the Update option and its suboptions to specify the filter criteria and whether this filter list is inclusive or exclusive.

You can now create a filter to filter packets to be sent (outgoing) the interface you specify.

  1. Create a filter on the desired interface using the Create Filter option, specifying whether it is an input or output filter.

  2. Enable the filter using the Enable option.

  3. Attach filter lists to the filter using the Attach option.

  4. Set the default action for the filter using the Default Value option. The default action will be taken if no match is made on any of the attached filter lists.

Select the interface number to which the output filter is to be attached.

A number is automatically assigned to a filter when it is created and from that point on is used to identify the filter, so you do not have continue to specify the interface and direction (input or output).

Select the Submit button.


IPX Filter-Lists Router Create List

Creates a filter-list with the name you specify.

Enter a List-name.

Valid Values: any alphanumeric string up to 16 characters

Default Value: none

Select the Submit button.


IPX Filter-Lists Router Default Include

Specifies the default action to be Include.

When no match is found for any of the filter items, the packet is processed.

Select a Filter number, which is the number of the filter for which you are setting a default include action.

To display a numbered list of configured filters, use IPX List.

Select the Submit button.


IPX Filter-Lists Router Default Exclude

Specifies the default action to be Exclude.

When no match is found for any of the filter items, the packet is dropped.

Select a Filter number, which is the number of the filter for which you are setting a default exclude action.

To display a numbered list of configured filters, use IPX List.

Select the Submit button.


IPX Filter-Lists Router Delete Filter

This parameter deletes the filter number you specify.

Select the filter number you want to delete.

To display a numbered list of configured filters, use IPX List.

Select the Submit button.


IPX Filter-Lists Router Delete List

This parameter deletes the filter list number you specify.

Select the filter list number you want to delete.

To display the names of configured filter lists, use IPX LIST.

Select the Submit button.


IPX Filter-Lists Router Detach

This parameter detaches a filter-list from a filter.

  1. Enter the filterList-name you want to detach.

    Valid Values: Any alphanumeric string up to 16 characters

    Default Value: None

  2. Select the Filter number.