Nokia IPSO 4.0 manual Interface Status

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Physical Interface	Logical Interface
	Default	Cisco HDLC	PPP	Frame Relay
Serial		One (c0)	One (c0)	One per DLCI (c#)
(X.21 or V.35)
T1/E1		One (c0)	One (c0)	One per DLCI (c#)
HSSI		One (c0)	One (c0)	One per DLCI (c#)
Token Ring	One (c0)
ISDN			One (c#)

For example, the logical interface of a physical interface eth-s2p1 is called eth-s2p1c0. The logical interfaces for PVCs 17 and 24 on an ATM NIC in slot 3 are called atm-s3p1c17 and atm-s3p1c24 respectively.

Once a logical interface exists for a device, you can assign an IP address to it. For Ethernet, FDDI, and Token Ring, you must specify the interface's local IP address and the length (in bits) of the subnet mask for the subnet to which the device connects.

If you are running multiple subnets on the same physical network, you can configure additional addresses and subnet masks on the single logical interface connected to that network. You do not need to create additional logical interfaces to run multiple subnets on a single physical network.

For point-to-point media, such as ATM, serial, or HSSI, you can either assign IP addresses or configure an unnumbered interface. When assigning IP addresses you must specify the IP address of the local interface and the IP address of the remote system's point-to-point interface.

You can add only one local/destination IP address pair to a point-to-point logical interface. To assign IP addresses to multiple VCs, you must create a logical interface for each VC. IP subnets are not supported on point-to-point interfaces.

Whenever an unnumbered interface generates a packet, it uses the address of the interface that the user has specified as the source address of the IP packet. Thus, for a router to have an unnumbered interface, it must have at least one IP address assigned to it. The Nokia implementation of unnumbered interfaces does not support virtual links.

Note

If you make changes to IP addresses or delete interfaces, the firewall sometimes does not learn of the changes when you get the topology. If you get the topology and your changes to interfaces are not shown, stop and restart the firewall.

Interface Status

The configuration and status of removable-interface devices are displayed. Interfaces can be changed while they are offline. Table 2 describes the interface status indicators.

32 Nokia Network Voyager for IPSO 4.0 Reference Guide