Enterasys Networks X-PeditionTM manual Overview of WAN Interfaces, WAN Features

Overview of WAN Interfaces

Table 3-1 MIB-II Interface Statistics (continued)

Variable	Description
ifInNUcastPkts	Sum of non-unicast packets delivered to a higher layer protocol.
IfInDiscards	Sum of inbound packets discarded.
IfInErrors	Sum of inbound packets that contained errors.
IfOutOctets	Sum of octets transmitted on the interface
ifOutUcastPkts	Sum of subnetwork-unicast packets sent to the network.
ifOutNUcastPkts	Sum of non-unicast packets transmitted to the network.
IfOutErrors	Sum of outbound packets that could not be sent due to errors.
IfOutDiscards	Sum of outbound packets discarded.

Overview of WAN Interfaces

The XSR supports as many as six serial cards (in an XSR-3250), each of which can support four ports for a maximum of 24 serial ports. Each port is individually configurable regarding speed, media-type, and protocol.

The Serial WAN interface performs the following functions:

•Transmit packets given by the protocol layer onto a serial link.

•Receive packets from a serial link and pass up to the protocol layer.

•Allow CLI configuration commands to be issued.

•Accumulate all MIB-II (RFC-1213) interface statistics regarding the transmission and reception of bytes and packets.

WAN Features

The XSR supports the following WAN interface features:

•Alarms/events - For a complete list, refer to “Alarms/Events, System Limits, and Standard ASCII Table” on page A-1in this manual.

•Interfaces - The following interface types can be configured using the media-typecommand:

–RS232 (also known as V.28) (default)

–RS422 (also known as RS-530)

–RS449 (also known as V.36)

–RS530A

–V.35

–X.21

•Either Sync or Async mode is set by using physical-layer.

•Encoding - On Sync interfaces, nrzi-encodingsets NRZI encoding (NRZ encoding is the default).

XSR User’s Guide 3-3