62Appendix A IfIndexes and Interface Identification
IfIndex Table Display Definitions
Interface Extension Type
The interface extension type, shown as IfExtType in the display above, describes the port, protocol, service, or other interface identified by the IfIndex. The following table describes some of the common interface extension types seen on the Passport 4460.
ethernetCsmacd | The Ethernet port |
| interface is always assigned IfIndex 1. |
propVirtual | A virtual port on the Passport 4460. Virtual ports are used to direct |
| traffic across a WAN link. By default, there are two virtual ports, |
| assigned IfIndexes 2 and 4. For more information on virtual ports, |
| see the Online Documentation, LAN Services. |
propMultiplexor | A physical port on the Passport 4460. There are three physical |
| ports on the base module. |
frameRelay | A frame relay protocol implemented on a physical port. |
| frameRelay refers to the switching protocol used for PANL and |
| RFC1490 netlinks. |
frameRelayService | A frame relay protocol implemented on a physical port. |
| frameRelayService refers to Frame Relay DCE service. |
v35 | The connector type for a physical port. V.35 is one of several |
| connector types supported on Passport 4460 physical ports. For |
| more information, refer to Reference for the Passport 4400 Cables, |
| |
| |
other | The protocol or service for this IfIndex is undefined or unknown to |
| the Passport 4460. |
|
|
PPA Number
The Point of Physical Attachment (PPA) is not a literal physical point of attachment, but is an internal identifier for the Passport 4460 code. Each PPA can have one or more IfIndexes associated with it, but the PPA numbers are unique only within the module; they are not unique across all devices or slots.
