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Beginner

`How to understand in iterface what type of sfp is plugged? How you make difference with Multimode and Single mode?

`How to understand in iterface what type of sfp is plugged? How you make difference with Multimode and Single mode?

I use these commands:
show inventory
show interface status
show interface <interface name>

For example:
show interface status
Gi0/24 connected trunk a-full a-1000 1000BaseLX SFP


show inventory 

PID: WS-C2960G-24TC-L , VID: V03, SN: FOC1250W0K0

NAME: "GigabitEthernet0/23", DESCR: "1000BaseLX SFP"
PID: , VID: , SN: 

NAME: "GigabitEthernet0/24", DESCR: "1000BaseLX SFP"
PID: , VID: , SN: 


show interface g0/24
GigabitEthernet0/24 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0024.50c8.af18 (bia 0024.50c8.af18)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseLX SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, 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: 0/0 (size/max)
5 minute input rate 5196000 bits/sec, 3580 packets/sec
5 minute output rate 263000 bits/sec, 318 packets/sec
11084523384 packets input, 1318676988084 bytes, 0 no buffer
Received 6328634102 broadcasts (4247825788 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 4247825788 multicast, 0 pause input
0 input packets with dribble condition detected
265989268 packets output, 65412026768 bytes, 0 underruns

 

Maybe LX is mean the type of sfp module?

LX is for what type of sfp? Single mode?

SX is for Multimode?

1 ACCEPTED SOLUTION

Accepted Solutions
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Beginner

Re: `How to understand in iterface what type of sfp is plugged? How you make difference with Multimode and Single mode?

Hi,

You are correct. SX SFPs are required for transmission over multi-mode fiber, and LX are used for single mode.

Daryl
2 REPLIES 2
Highlighted
Beginner

Re: `How to understand in iterface what type of sfp is plugged? How you make difference with Multimode and Single mode?

Hi,

You are correct. SX SFPs are required for transmission over multi-mode fiber, and LX are used for single mode.

Daryl
Beginner

Re: `How to understand in iterface what type of sfp is plugged? How you make difference with Multimode and Single mode?

From where come SX and LX?
SX- Short Distance (Multi-mode)
LX - Long Distance (Single Mode
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