Hi All,
I have several Cisco 3560C setup at multiple stations. The Cisco 3560C are connected in a daisy chain between each other using 100BASE-BX10-D and 100BASE-BX10-U SFP. So, on the first Cisco 3560C (station 1), I have a U-type connecting to the second Cisco 3560C (station 2.). The second Cisco 3560C (station 2) will have a D-type and U-type SFP where the D-type connects to the previous station 1 on its U-type SFP. This setup repeats for station 3 onwards.
It seems that these connections between the stations, I noticed that the Cisco switch registers the link at 100Mb half-duplex and I see incrementing CRCs and collisions. I am not able to hard-code the interface to 100Mb FULL as it seems that the interface configuration does not give me the option to do a 'speed 100' or 'duplex full'.
Is this normal for these kinds of SFP?
Below are some outputs:
Cisco IOS Software, C3560C Software (C3560c405-UNIVERSALK9-M), Version 12.2(55)EX3, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Wed 10-Aug-11 07:37 by prod_rel_team
Image text-base: 0x00003000, data-base: 0x02100000
Switch(config)#do sh int status
Port Name Status Vlan Duplex Speed Type
Fa0/1 notconnect 15 auto auto 10/100BaseTX
Fa0/2 notconnect 15 auto auto 10/100BaseTX
Fa0/3 notconnect 15 auto auto 10/100BaseTX
Fa0/4 notconnect 15 auto auto 10/100BaseTX
Fa0/5 connected 15 a-full a-100 10/100BaseTX
Fa0/6 notconnect 15 auto auto 10/100BaseTX
Fa0/7 notconnect 15 auto auto 10/100BaseTX
Fa0/8 notconnect 15 auto auto 10/100BaseTX
Fa0/9 notconnect 15 auto auto 10/100BaseTX
Fa0/10 notconnect 15 auto auto 10/100BaseTX
Fa0/11 connected trunk a-full a-100 10/100BaseTX
Fa0/12 connected trunk a-full a-100 10/100BaseTX
Gi0/1 connected trunk a-half a-100 100BaseBX-10U SFP
Gi0/2 connected trunk a-half a-100 100BaseBX-10D SFP
Switch#sh interfaces gigabitEthernet 0/2
GigabitEthernet0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is c025.5c11.928d (bia c025.5c11.928d)
Description:
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 254/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Half-duplex, 100Mb/s, link type is auto, media type is 100BaseBX-10D SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
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 80000 bits/sec, 22 packets/sec
5 minute output rate 16000 bits/sec, 16 packets/sec
74931 packets input, 21611558 bytes, 0 no buffer
Received 48734 broadcasts (39982 multicasts)
0 runts, 0 giants, 0 throttles
667 input errors, 667 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 39982 multicast, 0 pause input
0 input packets with dribble condition detected
23385 packets output, 3857612 bytes, 0 underruns
0 output errors, 564 collisions, 1 interface resets
0 babbles, 29 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
