GLC-T to WS-G5483 1000baseTX help!!

[jxande8]

Hi,
I am trying to establish connectivity between an older WS-C3548-XL-EN and 2 newer WS-C3560-24PS-S through the 1000base ports. The cables are Cat5e (tried straight thru and Xover). The 3548 takes the older WS-G5483 transceiver and the 3560 takes the newer GLC-T SFP transceiver.
I've tested the GBICs and GLC-T to GLC-T work and the WS-G5483 to WS-G5483 work. But when I try the way I need it to work (3548 with 2 5483 to 2 3560s with a GLC-T each) the 3560 sees the connectivity but the 3548 does not.What am I missing???


Thanks in advance for any advice,
J

 

[chipk]

Hello, What do you mean by "sees the connectivity"? What's your show interface saying on each side? Are you seeing UP/UP, UP/DOWN, DOWN/DOWN??? Also, how do you have those ports configured? Trunks? Do you have matching trunking protocols? No IPs configured or anything like that?

 

[jxande8]

Here are the show interface for a 3548 with WS-G5483 in G0/1 and a 3560 with GLC-T in int G0/1. I don't have trunking configured yet.

3548#sho int g0/1
GigabitEthernet0/1 is down, line protocol is down
Hardware is Gigabit Ethernet, address is 0008.2190.6831 (bia 0008.2190.6831)
MTU 1500 bytes, BW 0 Kbit, DLY 0 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 1000Mb/s, media type is T
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:05:19, output 00:05:36, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
161110 packets input, 192388375 bytes, 0 no buffer
Received 160936 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 32236 multicast, 0 pause input
2102 packets output, 412754 bytes, 0 underruns
0 output errors, 0 collisions, 5 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
3548#
3560#sho int g0/1
GigabitEthernet0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0015.f950.e181 (bia 0015.f950.e181)
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 10/100/1000BaseTX SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:12:33, output 00:00:01, 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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
35380 packets input, 2662025 bytes, 0 no buffer
Received 35380 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 35379 multicast, 0 pause input
0 input packets with dribble condition detected
157963 packets output, 12222593 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
3560#

What am I missing?

 

[chipk]

Huh, that's interesting. You're not supposed to need a crossover, but you better make sure that you don't have auto mdix disabled (#mdix auto). Also make sure both ports are set to auto speed and duplex. See what happens after you verify all that.

 

[chipk]

Sorry, just to clarify "mdix auto" is an interface command.

 

[jxande8]

mdix is enabled on 3560. 3548 doesn't recognize mdix. Speed set to 1000 and duplex is auto.

 

[chipk]

Speed and duplex should both be auto. Did you try turning off mdix when you used a crossover? It's not supposed to have to work that way, but it's worth a try.

 

[jxande8]

Interfaces defaulted and everything is Auto/Auto. MDIX disabled and Xover tried but didn't work. Straight thru did not either.

 

[chipk]

And those cables work if you use them on other interfaces...strange. Have you checked the compatibility matrices and everything? I'm really stretching it here.

Generally, when I've seen an interface on one side of a link say up, and the other side says down, it's a bad cable, but that doesn't seem to be the case here.

 

[jxande8]

Thanks for the help chipk but I am giving up for now. The GLC-T is capable of 10/100/1000 so I am just uplinking them to 10/100 ports for now. I am starting to think my WS-G5483s are defective. Just tried to link them back to back on 2 3524s and they wouldn't come up.

Thanks and I will keep you posted if I find out it wasn't a hardware error.
J

 

[chipk]

Ok, good luck.