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Table Of Contents
IPX Routing: Ethernet Configuration Dialog Box
Network Number (per Frame Type)
Block IPX Type 20 Output Packets
IPX Routing: WAN Configuration Dialog Box
Optional Remote Node Network Number
Use Ethernet Port as End-Node Proxy
Block IPX Type 20 Output Packets
IPX Routing: VPN Configuration Dialog Box
Block IPX Type 20 Output Packets
IPX Routing: Bridge Configuration Dialog Box
Network Number (per Frame Type)
Block IPX Type 20 Output Packets
IPX Routing & Bridging
IPX Routing: Ethernet Configuration Dialog Box
To access this dialog box (Figure 3-1), select Ethernet/IPX Routing in the Device View.
Figure 3-1 IPX Routing: Ethernet Configuration Dialog Box
IPX Ethernet Frame Types
These devices support all four defined IPX frame types, and will perform routing between frame types as necessary. Whether each or all of these frame types are used on an individual Ethernet interface is determined by the settings for each type.
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Ethernet Type II is commonly used by TCP/IP and DECnet. The default seeding value is Non-Seed.
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IPX Routing/Bridging/Off
This set of radio buttons controls how IPX packets are handled for this interface.
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The IPX Bridging radio button will be grayed out unless bridging has been turned on globally for the device using the Main Bridging Configuration dialog box (under Global/Bridging) and locally on this interface using the Ethernet-Bridging dialog box (under Ethernet/Bridging).
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Seed Status (per Frame Type)
One of the functions which routers perform in IPX internetworking is setting the IPX network number for each network segment. A router which sets the network number for a segment is said to have "seeded" the network.
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Network Number (per Frame Type)
This is an eight-digit hexadecimal number that uniquely identifies the network segment connected to this interface. Values range from 1 to FFFFFFFE.
Accidental selection of an IPX network number which is already in use on another network segment may cause hard-to-diagnose problems. You should carefully track which IPX network numbers are in use, and where they are used.
RIP Update Timer
This value dictates how often the device sends out IPX RIP (Routing Information Protocol) packets on the network segment attached to this interface. The RIP packets sent out on this interface contain information about networks for which this device is responsible. RIP packets received tell the device about other networks and routers. The default is 60 seconds.
SAP Update Timer
This value dictates how often the device sends out IPX SAP (Service Access Protocol) packets on the network segment attached to this interface. The SAP packets sent out on this interface contain information about services (such as servers, printers, etc.) for which this device is responsible. SAP packets received tell this device about services available on other network segments. The default is 60 seconds.
Block IPX Type 20 Output Packets
In order for some protocols, notably NetBIOS, to function in the NetWare environment, routers must propagate a certain type of broadcast packet throughout an IPX internetwork. IPX packet type 20 is designated to perform broadcast propagation for these protocols.
When an IPX device receives a type 20 packet, it rebroadcasts it out all interfaces, except the one on which it was received. The IPX network number of the originating interface is included in the rebroadcast packets.
This checkbox allows you to control the rebroadcasting of IPX type 20 packets on this interface. This is useful for on-demand WAN links where the link may be brought up as a result of propagating this type of packet.
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IPX Routing: WAN Configuration Dialog Box
To access this dialog box (Figure 3-2), select WAN/IPX Routing in the Device View.
Figure 3-2 IPX Routing: WAN Configuration Dialog Box
IPX Routing/Bridging/Off
This set of radio buttons controls how IPX packets are handled for this interface.
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The IPX Bridging radio button will be grayed out unless bridging has been turned on globally for the device using the Main Bridging Configuration dialog box (under Global/Bridging) and locally on this interface using the WAN-Bridging dialog box (under WAN/Bridging).
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Numbered Interface
This checkbox determines whether the Wide Area Network connected to this interface will have an IPX network number associated with it.
Many WAN connections are simple point-to-point links. These links do not generally require a network number because there are only two devices on the link. All traffic sent from one end is, by definition, destined for the other end. You generally do not need a numbered WAN interface if you are using the PPP transport protocol.
In contrast, Frame Relay networks may have a number of participating devices connected through a single physical interface. Because of this, use of the Frame Relay transport protocol requires a numbered WAN interface.
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Network Number
This is an eight-digit hexadecimal number that uniquely identifies the network segment connected to this interface. Values range from 1 to FFFFFFFE.
Accidental selection of an IPX network number which is already in use on another network segment may cause hard-to-diagnose problems. You should carefully track which IPX network numbers are in use, and where they are used.
Update Method
WAN interfaces which are configured to provide "dial-on-demand" service will bring a connection up (i.e. dial the other end) when there are network packets which must be transferred over the link. Once a dial-on-demand connection is up, network traffic passing across the link causes the inactivity timer for the link to be reset, keeping the connection up.
The IPX RIP protocol periodically sends out update information across a link. These periodic update packets will cause a WAN interface set for dial-on-demand operation to either stay up indefinitely, or to continuously dial, connect, and then drop the connection.
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RIP Update Timer
This value dictates how often the device sends out IPX RIP (Routing Information Protocol) packets on the WAN link attached to this interface. The RIP packets sent out on this interface contain information about networks for which this device is responsible. RIP packets received tell the device about other networks and routers. The default is 60 seconds.
SAP Update Timer
This value dictates how often the device sends out IPX SAP (Service Access Protocol) packets on the WAN link attached to this interface. The SAP packets sent out on this interface contain information about services (such as servers, printers, etc.) for which this device is responsible. SAP packets received tell this device about services available on other network segments. The default is 60 seconds.
Optional Remote Node Network Number
Besides defining a method for router-to-router communication, the PPP protocol defines a method for individual client machines to dial in to a router interface. Once a client machine has connected to a router interface in this fashion, the router provides proxy services which allow the client machine to participate as a node on one of the router's local networks.
If remote node operation is desired, the WAN interface would usually be set up as an unnumbered interface, and the Remote Node Network Number would then be set to an IPX network number from the router's Ethernet interface(s).
Alternatively, if the interface is set to be numbered, an unused IPX network number may be used.
Use Ethernet Port as End-Node Proxy
The router can be set to dynamically reserve an IPX address for this WAN interface on an Ethernet segment. This proxy address will then be used if the remote PPP IPX implementation requests address negotiation (generally used by end-node clients).
Since the reserved address will be assigned to this interface, this checkbox can only be checked on an interface set to be unnumbered.
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Block IPX Type 20 Output Packets
In order for some protocols, notably NetBIOS, to function in the NetWare environment, routers must propagate a certain type of broadcast packet throughout an IPX internetwork. IPX packet type 20 is designated to perform broadcast propagation for these protocols.
When an IPX router receives a type 20 packet, it rebroadcasts it out all interfaces, except the one on which it was received. The IPX network number of the originating interface is included in the rebroadcast packets.
This checkbox allows you to control the rebroadcasting of IPX type 20 packets on this interface. This is useful for on-demand WAN links where the link may be brought up as a result of propagating this type of packet.
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Novell's router specification recommends that type 20 packets not be propagated across links with bandwidths of less than 1 megabit per second (such as asynchronous dial-up links and 56K leased lines).
IPX Routing: VPN Configuration Dialog Box
VPN (Virtual Private Network) ports must first be added to the edit area of a device before they can be configured. For more information about adding and deleting VPN ports, see Chapter 6, "VPN Ports and LAN-to-LAN Tunnels."
A VPN port is a virtual port which handles tunneled traffic. Tunnels are virtual point-to-point connections through a public network such as the Internet. All packets sent through a VPN tunnel are IP-encapsulated packets, including AppleTalk, IPX and even IP packets. This encapsulation is added or removed, depending on the direction, by "Tunnel Partner" devices.
Once a packet reaches the remote Tunnel Partner, the TCP/IP encapsulation is stripped off, leaving the original protocol. The unencapsulated packet is then handled according to the VPN port's protocol configuration settings. Networks connected via a tunnel will communicate as if they are on the same network, even though they are separated by the Internet.
You must set up both ends of every tunnel. Therefore, you must repeat this setup with the remote device.
To access this dialog box (Figure 3-3), select VPN/IPX Routing in the Device View under the VPN port's icon.
Figure 3-3 IPX Routing: VPN Configuration Dialog Box
IPX Routing/Bridging/Off
This set of radio buttons controls how IPX packets are handled for this interface.
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The IPX Bridging radio button will be grayed out unless bridging has been turned on globally for the device using the Main Bridging Configuration dialog box (under Global/Bridging) and locally on this interface using the VPN-Bridging dialog box (under VPN/Bridging).
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Numbered Interface
This checkbox determines whether the VPN port will have an IPX network number associated with it.
VPN tunnels are essentially point-to-point links. These links do not generally require a network number because all traffic sent from one end is, by definition, destined for the other end. However, you may wish to assign an address for network tracking purposes.
Network Number
This IPX Network Number is an eight-digit hexadecimal number that uniquely identifies the network segment(s) connected to this interface. Values range from 1 to FFFFFFFE.
Accidental selection of an IPX network number which is already in use on another network segment may cause hard-to-diagnose problems. You should carefully track which IPX network numbers are in use, and where they are used.
Update Method
VPN links which are configured to provide "dial-on-demand" service will bring a connection up (i.e. dial the other end) when there are network packets which must be transferred over the link. Once a dial-on-demand connection is up, network traffic passing across the link causes the inactivity timer for the link to be reset, keeping the connection up.
The IPX RIP protocol periodically sends out update information across a link. These periodic update packets will cause a VPN link set for dial-on-demand operation to either stay up indefinitely, or to continuously dial, connect, and then drop the connection.
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RIP Update Timer
This value dictates how often the device sends out IPX RIP (Routing Information Protocol) packets on the network segments attached to this interface. The RIP packets sent out on this interface contain information about networks for which this device is responsible. RIP packets received tell the device about other networks and routers. The default is 60 seconds.
SAP Update Timer
This value dictates how often the device sends out IPX SAP (Service Access Protocol) packets on the network segments attached to this interface. The SAP packets sent out on this interface contain information about services (such as servers, printers, etc.) for which this device is responsible. SAP packets received tell this device about services available on other network segments. The default is 60 seconds.
Block IPX Type 20 Output Packets
In order for some protocols, notably NetBIOS, to function in the NetWare environment, devices must propagate a certain type of broadcast packet throughout an IPX internetwork. IPX packet type 20 is designated to perform broadcast propagation for these protocols.
When an IPX device receives a type 20 packet, it rebroadcasts it out all interfaces, except the one on which it was received. The IPX network number of the originating interface is included in the rebroadcast packets.
This checkbox allows you to control the rebroadcasting of IPX type 20 packets on this interface. This is useful for on-demand links where the link may be brought up as a result of propagating this type of packet.
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Novell's router specification recommends that type 20 packets not be propagated across links with bandwidths of less than 1 megabit per second (such as asynchronous dial-up links and 56K leased lines).
IPX Routing: Bridge Configuration Dialog Box
Bridging operates on physical network addresses (such as Ethernet addresses), rather than logical addresses (such as IPX addresses). From the standpoint of IPX networking, interfaces which are set to bridge IPX between themselves appear as a single logical entity.
Thus, a device's "IPX Bridge Group" is made up of all of the physical network interfaces in a device which have been set to bridge IPX. This setting can be found in the IPX Configuration dialog box for each individual physical interface. For example, see the IPX Routing/Bridging/Off radio buttons in the IPX Routing: Ethernet Configuration dialog box.
Logically, the IPX Bridge Group is treated by the device as an interface (Bridge 0). The settings in the IPX Routing: Bridge 0 Configuration dialog box determine the IPX parameters for all of the physical network interfaces which make up the IPX Bridge Group. This is shown schematically in Figure 3-4.
Figure 3-4 Bridge Logical Diagram
To access the IPX Routing: Bridge dialog box (Figure 3-5), select Bridge 0/IPX Routing in the Device View.
Figure 3-5 IPX Routing: Bridge 0 Configuration Dialog Box
IPX Frame Types
These devices support all four defined IPX frame types, and will perform routing between frame types as necessary. Whether each or all of these frame types are used on an individual Bridge interface is determined by the settings for each type.
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IPX Routing/Off
These radio buttons control whether IPX packets received by a member interface of the IPX Bridge Group are passed on for IPX routing.
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Seed Status (per Frame Type)
One of the functions which routers perform in IPX internetworking is setting the IPX network number for each network segment. A device which sets the network number for a segment is said to have "seeded" the network. Remember that all segments connected to interfaces which are members of an IPX Bridge Group will appear as the same logical segment.
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Network Number (per Frame Type)
This is an eight-digit hexadecimal number that uniquely identifies the network segment(s) connected to this interface. Values range from 1 to FFFFFFFE.
Accidental selection of an IPX network number which is already in use on another network segment may cause hard-to-diagnose problems. You should carefully track which IPX network numbers are in use, and where they are used.
RIP Update Timer
This value dictates how often the device sends out IPX RIP (Routing Information Protocol) packets on the network segment(s) attached to this interface. The RIP packets sent out on this interface contain information about networks for which this device is responsible. RIP packets received tell the device about other networks and routers. The default is 60 seconds.
SAP Update Timer
This value dictates how often the device sends out IPX SAP (Service Access Protocol) packets on the network segment(s) attached to this interface. The SAP packets sent out on this interface contain information about services (such as servers, printers, etc.) for which this device is responsible. SAP packets received tell this device about services available on other network segments. The default is 60 seconds.
Block IPX Type 20 Output Packets
In order for some protocols, notably NetBIOS, to function in the NetWare environment, routers must propagate a certain type of broadcast packet throughout an IPX internetwork. IPX packet type 20 is designated to perform broadcast propagation for these protocols.
When an IPX device receives a type 20 packet, it rebroadcasts it out all interfaces, except the one on which it was received. The IPX network number of the originating interface is included in the rebroadcast packets.
This checkbox allows you to control the rebroadcasting of IPX type 20 packets on this interface. This is useful for on-demand WAN links where the link may be brought up as a result of propagating this type of packet.
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