Just installed a 6509e and a 3560 switch in my LAN. Singlemode fiber is connecting the 2 switches using gbics. When moving data between the switches, transfer speeds get no higher than around 50mbps. Doing a sh int gig 5/1 produces the following. Lot of input errors. I would think possibly a duplex/speed mismatch, but it does not appear that I can configure on the sfp ports. Any help would be greatly appreciated.
GigabitEthernet5/1 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 0016.4708.9d30 (bia 0016.4708.9d3
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 254/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is SX
input flow-control is off, output flow-control is off
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:01:18, output 00:00:45, output hang never
Last clearing of "show interface" counters 01:10:38
Input queue: 0/2000/0/0 (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 7000 bits/sec, 9 packets/sec
351983 packets input, 237817255 bytes, 0 no buffer
I will have the fiber patch tested. Using ethernet backbone speeds were fine and no input errors. On the fiber port, after changing where I was plugged in on the panel, the times were better, but the input errors were still increasing. Link light was flashing green/orange indicating an error. Speeds were better, but would fluctuate.
You said you are using single mode fibre for the link, but the the show interface output states media type is SX - this indicates a multi mode transciever (If SFP/GBIC were single mode , then media type would be LX or LH). You cannot mix these modes unless using fibre mode conditioning patch leads. This may be your problem,
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