JDS42
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Connecting 2 Cisco Switches
I am trying to connect two Cisco switches, a 3550 switch to a port on the 4503. I have my 3350 port 0/2 connected to my 4503 on the blade 3/25 port.
I have both ports on both switch configured as follows:
switchport trunk encapsulation dot1q
switchport mode trunk
both ports are enabled but I am not getting any link lights between the two ports. I have tried standard and crossover cables. I am sure I am missing something simple. We are not running multiple vlans, just default. Any help would be appreciated.
John
I have both ports on both switch configured as follows:
switchport trunk encapsulation dot1q
switchport mode trunk
both ports are enabled but I am not getting any link lights between the two ports. I have tried standard and crossover cables. I am sure I am missing something simple. We are not running multiple vlans, just default. Any help would be appreciated.
John
Sean
did you do a no shut on the ports? can you post the whole config for the ports?
ASKER
Sure, see below. I did a no shut on both ports during my testing.
Here is my main switch 4503
FastEthernet3/25 is down, line protocol is down (notconnect)
Hardware is Fast Ethernet Port, address is 000f.23bd.4e98 (bia 000f.23bd.4e98)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto-speed, link type is auto, media type is 10/100BaseTX
input flow-control is unsupported output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters never
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 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
My 3550 Switch
GigabitEthernet0/2 is down, line protocol is down
Hardware is Gigabit Ethernet, address is 000c.30f1.209a (bia 000c.30f1.209a)
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto-speed
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
1000BaseT module (WS-G5483) in GBIC slot.
Last input never, output never, 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
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 2 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
Here is my main switch 4503
FastEthernet3/25 is down, line protocol is down (notconnect)
Hardware is Fast Ethernet Port, address is 000f.23bd.4e98 (bia 000f.23bd.4e98)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto-speed, link type is auto, media type is 10/100BaseTX
input flow-control is unsupported output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters never
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 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
My 3550 Switch
GigabitEthernet0/2 is down, line protocol is down
Hardware is Gigabit Ethernet, address is 000c.30f1.209a (bia 000c.30f1.209a)
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto-speed
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
1000BaseT module (WS-G5483) in GBIC slot.
Last input never, output never, 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
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 2 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
ASKER
Would going from my GBIC 1000BaseT on the 3550 to a 10/100 port on my 4503 cause this issue, mismatch duplex?
Yes if the port speeds are different you may need to set the speed. I would hard set the speed on both interfaces.
Also do a show run and paste in the port config.
Also do a show run and paste in the port config.
ASKER
I will hard code them on both ends and give it another try. Thx
ASKER
The GBIC cannot be set, but it shows it is set up for auto negotiate.
00:18:23: %GBIC_1000BASET-6-GBIC_100
Here is my conf for each port
4503
interface FastEthernet3/25
switchport trunk encapsulation dot1q
switchport mode trunk
3550
interface GigabitEthernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
00:18:23: %GBIC_1000BASET-6-GBIC_100
Here is my conf for each port
4503
interface FastEthernet3/25
switchport trunk encapsulation dot1q
switchport mode trunk
3550
interface GigabitEthernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
SOLUTION
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Is this using an SFP module?
Also if you plug in a laptop into those ports do they work and detect a link? It is possible a port is bad.
I do have a feeling that the Gig port isn't allowing the speed to be set to 100 so it's not coming up. Do you have a different port to try that isn't gb?
Also did you try to use the command "speed 100" on the gigabit port?
Also if you plug in a laptop into those ports do they work and detect a link? It is possible a port is bad.
I do have a feeling that the Gig port isn't allowing the speed to be set to 100 so it's not coming up. Do you have a different port to try that isn't gb?
Also did you try to use the command "speed 100" on the gigabit port?
ASKER
Hey Jane, I have a GBIC 1000BASE-T WS-G5483 on my 3550, the other end is just plugging into one of my standard ports on the blade 4503, its not a management blade and is a 10/100 switch. I dont have any SFP modules connected to either device.
ASKER
Sean-
No SFP modules used. If i plug my laptop (which has a gig nic) into either of these ports 3/25 or 0/2 both show a link light.
The GBIC port will not let me set the speed, I think GBICs can only be set to auto from what I read.
No SFP modules used. If i plug my laptop (which has a gig nic) into either of these ports 3/25 or 0/2 both show a link light.
The GBIC port will not let me set the speed, I think GBICs can only be set to auto from what I read.
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ASKER
Thanks Sean, I dont have any others on hand, will have to order some. Thanks again for your input.
no problem glad to help