Foundry Switch and Router Installation and Configuration Guide
6 - 26 December 2000
BigIron(config)# show interface pos 2/1
POS2/1 is up
No port name
Hardware is Packet over Sonet
MTU 4470 bytes, encapsulation PPP, clock is internal
Framing is SONET, BW 622000Kbit, CRC 32
Loopback not set, keepalive is set (10 sec), scramble disabled
LCP state is open
5 minute input rate: 0 bits/sec, 0 packets/sec
5 minute output rate: 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 CRCs, 0 shorts, 0 giants, 0 alignments
0 packets output, 0 bytes, 0 underruns
Line protocol is UP
Member of 4 L2 VLANs, port is tagged, port state is FORWARDING
STP configured to ON
The “Line protocol is UP" line means that the Link Control Protocol (LCP) handshake was successful and the end-
to-end connectivity is up.
NOTE: The lines shown in bold type in this example appear only if the port is enabled for Layer 2 switching.
Displaying POS Statistics
To display POS packet statistics, use the following method.
USING THE CLI
To display POS statistics for POS interface 2/1, enter the following command at any CLI level:
BigIron> show statistics pos 2/1
POS Packets Errors
Port [Receive Transmit] [Align FCS Giant Short]
2/1 1475 12301 0 1378 3 0
Syntax: show statistics pos <portnum>
The command shows the following information for the specified POS port.
Table 6.4: CLI Display of POS Interface Statistics
This Field... Displays...
Packet counters
Receive The number of packets received on this interface.
Transmit The number of packets transmitted on this interface.
Packet Errors
These fields show statistics for various types of packet errors. The Layer 3 Switch drops packets that contain
one of these errors.
Align The number of packets that contained frame alignment errors.
FCS The number of packets that contained Frame Check Sequence errors.
Giant The number of packets that were longer than the configured MTU.
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