Which SFP Module for WS-C3750G-12S switch to enable port for 100MB copper

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Oct 21st, 2009
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Which SFP module should I use for my WS-C3750G-12S switch so I can connect a LES100 (100MB)link to the switch. The LES100 link is presented on an RJ45 cable. The WS-C3750G-12S switch has no RJ45 ports.

The LES100 link is over 500 meters.

Many Thanks

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Joseph W. Doherty Wed, 10/21/2009 - 03:53
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Assuming I'm not mistaken, I believe the SFP ports only support gig (including copper).

darrenriley5 Wed, 10/21/2009 - 06:13
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That's what I thought but have just been informed by BT that it will run at 100MB.


Model: WS-C3750-48P

Type: 10/100/1000BaseTX SFP

Speed: 10,100,1000,auto

Duplex: half,full,auto

Trunk encap. type: 802.1Q,ISL

Trunk mode: on,off,desirable,nonegotiate

Channel: yes

Broadcast suppression: percentage(0-100)

Flowcontrol: rx-(off,on,desired),tx-(none)

Fast Start: yes

QoS scheduling: rx-(not configurable on per port basis),

tx-(4q3t) (3t: Two configurable values and one fixed.)

CoS rewrite: yes

ToS rewrite: yes

UDLD: yes

Inline power: no

SPAN: source/destination

PortSecure: yes

Dot1x: yes

GigabitEthernet1/0/3 is up, line protocol is up (connected)

Hardware is Gigabit Ethernet, address is 001e.be6b.911b (bia 001e.be6b.911b)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive not set

Full-duplex, 100Mb/s, link type is auto, media type is 10/100/1000BaseTX 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 00:00:03, output hang never

Last clearing of "show interface" counters 2w5d

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

307 packets input, 23567 bytes, 0 no buffer

Received 258 broadcasts (258 multicasts)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 258 multicast, 0 pause input

0 input packets with dribble condition detected

130 packets output, 16247 bytes, 0 underruns

iyde Wed, 10/21/2009 - 11:41
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You will need a GLC-T for copper connection, which is what you need for RJ45.

This is what's shown here:

"Full-duplex, 100Mb/s, link type is auto, media type is 10/100/1000BaseTX SFP"

Edit: See this link - I hope it's not a Cisco Parner only link: http://www.cisco.com/en/US/products/hw/modules/ps5455/products_device_support_tables_list.html



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