10-23-2005 12:56 AM - edited 03-03-2019 12:32 AM
Hi
I have a 2950 switch. 24 port. IOS is c2950-i6q4l2-mz.121-6.EA2.bin
Seems to be working OK but the unused and unconnected ports report as follows;
FastEthernet0/11 is up, line protocol is down
Hardware is Fast Ethernet, address is 0007.85bf.be8b (bia 0007.85bf.be8b)
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 11w1d, output hang never
Last clearing of "show interface" counters 3w0d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
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 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
I would expect the port to be down/down, not up/down.
Any thoughts out there?
Ian
10-23-2005 06:12 PM
Ian
Why would you expect an unused interface to be down/down? When we talk about interface state the first part represents the hardware state of the interface (from a hardware perspective, is the interface working) and the second part represents the protocol state of the interface (does it have layer 2 connectivity). If the interface passes the various hardware checks that the box performs it will report the interface state as up. If keepalives fail it will report the protocol state as down.
So if the interface passes the various hardware tests why would the interface state not be up?
HTH
Rick
10-23-2005 06:52 PM
Just basing on my experience with the 3500 series switches. If an 3500 series FastEthernet interface is not connected, it reports down/down. So, a new "feature"?
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