HP 3000 Manuals HP 3000 Manuals
To Configure Neighbor Gateways You need to visit the next two screens only if you are configuring a non-gateway node that is on the same network as a gateway. In this case, the non-gateway node needs to know the identity of any neighbor gateway. Neighbor gateways can be either full or half gateways. Gateways that are on the same network are called neighbor gateways. A non-gateway node on a point-to-point network may need to go through a neighbor gateway in order to send messages to an entirely different network. (Two nodes are on the same network if the network portion of their IP addresses are the same.) All point-to-point nodes that are on the same network as a neighbor gateway need to know the identity of any neighbor gateways. When you configure a point-to-point node, you enter into its configuration the identity of any accessible neighbor gateways that share the same network. The identified gateways may be either full or half gateways. You may designate one gateway as a default gateway. Messages for a network will be routed to the default gateway if there is no gateway configured for the destination network. The default gateway will then attempt to locate the destination of the message.
NOTE You may only have one active default gateway per node. If you configure a default gateway on more than one NI on a single node, the active default gateway will be the gateway on the NI that you start last when you start your network interfaces.
To Identify Neighbor Gateways (If Any Are Present) The Neighbor Gateways screen(#152) in figure 7-3 is displayed when you press the [Neighbor Gateways] key at the Point-to-Point Link Configuration screen (#44) in figure 7-2.Figure 8-4. Neighbor Gateway Screen Steps. 1. In the Gateway namefield, enter the name of a gateway that is on the same network as the node that you are configuring. (Nodes are on the same network if the network portions of their IP addresses are the same.) Up to 14 gateways are supported per link. 2. If you are adding the identified gateway for the first time, press the [Add] key. If you are modifying the configuration of this node, press the [Modify] key. The Neighbor Gateway Reachable Networks screen will be displayed. Proceed to the section in this chapter titled "To Identify Neighbor Gateway Reachable Networks." 3. Repeat steps 1 and 2 for each gateway that is on the same network as the node that you are configuring. When you have finished, press the [Prior Screen] key to return to the Point-to-Point Configuration screen and proceed to the section in this chapter titled "To Configure Node Mapping." Fields. Gateway name Each gateway name can be as long as eight alphanumeric characters. The first character must be alphabetic. To Identify Neighbor Gateway Reachable Networks The Neighbor Gateway Reachable Networks screen(#158) in figure 7-4 is displayed when you press the [Add] key or the [Modify] key for a valid gateway name from the Neighbor Gateways screen (#152) in figure 7-3.Figure 8-5. Neighbor Gateway Reachable Networks Steps. 1. In the Neighbor Gateway IP Internet Addressfield, enter the IP address of the gateway specified on the Neighbor Gateways screen. An example of an address is: C 192.007.007 001 2. In the IP Network Address fields under the title Configured Reachable Networks, enter the IP addresses of all the remote networks that can be reached through the gateway whose IP address is configured in the previous field. 3. The IP subnet mask is optional.If entering one, tab to the next field. In the IP subnet mask field, enter the number in the same format as an IP address. 4. In the field labelled Hops, enter the number of hops (full gateways) needed to get to the target network. Two partner gateway halves count as one hop. 5. Repeat steps 2, 3, and 4 for each remote reachable network. The information configured in this screen can extend to more than one page, if necessary, to allow configuration of up to 2550 reachable networks per link (255 pages and 10 reachable nets per page). If you need to configure more than 10 networks, press the [Save Data] key then press the [Next Page] key to enter more networks. 6. After you have finished entering the IP addresses of all the reachable networks, press the [Save Data] key. Press the [Prior Screen] key to return to the Neighbor Gateways screen. 7. Back at the Neighbor Gateways screen, after you have finished adding all of the neighboring gateways, press the [Prior Screen] key to return to the Point-to-Point Link Configuration screen. Proceed to the section in this chapter titled "To Configure Node Mapping." Fields. If you have identified any neighbor gateways, then you will also be identifying: 1) the IP Network Addresses of all of the networks that you can reach through that gateway, and 2) the number of hops (corresponding to the number of gateways) that a packet passes through to reach a remote network from the local network. Two gateway halves count as one hop. Neighbor Gateway IP The IP address of the gateway whose name you Internet Address have specified on the Neighbor Gateways Screen. The IP address is in the same format as on the Point-to-Point Configuration screen. IP Network Address In the fields under this heading, you list the IP addresses of all of the networks that you will be able to reach through the gateway you are configuring. You also use this field to indicate whether or not the gateway is to serve as a default gateway by entering an at sign (@) to specify that it is a default gateway. Only one gateway can be designated as a default gateway for each 900 Series HP 3000 system. IP Mask (Optional) The fields under this heading allow you to specify a subnet mask for each reachable network. This mask is optional. For details on deriving an IP subnet mask, see chapter 2. Hops In the fields under this heading, enter the number of hops corresponding to the number of gateways that a packet travels to reach a remote network from a local network.
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