Unable to establish a trunk between a 4507R and 3560 over Fiber

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Dec 3rd, 2009
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I need to run trunking btween my core L3 switch (4507R) and a switch at my co-location (3560). When attemping to configure both sides as a trunk, the line never came up on the 3560. The biggest thing that stood out was that I could not set the speed and duplex on the gig port on my 4507R, which caused the other side to see the line as down.


Is it possible to trunk between these two devices or am I out of luck?


Interface hardware is as follows:


4507R


SW-CORE_MAIN-4507R#sh int gi3/6 controller
GigabitEthernet3/6 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet Port, address is 0015.fa52.c57f (bia 0015.fa52.c57f)
  Description: LLIXconnect
  Internet address is 172.16.6.241/30
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseLH
  input flow-control is on, output flow-control is off
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, 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 2558000 bits/sec, 301 packets/sec
  5 minute output rate 461000 bits/sec, 222 packets/sec
  L3 in Switched: ucast: 6813731599 pkt, 5450074402707 bytes - mcast: 0 pkt, 0 bytes
  L3 out Switched: ucast: 6086827844 pkt, 4232626503144 bytes - mcast: 0 pkt, 0 bytes
     6827754191 packets input, 5576069973229 bytes, 0 no buffer
     Received 14021771 broadcasts (4028627 IP 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
     6091220362 packets output, 4352920934278 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


And thr 3560:


TP_Switch1#sh int gi0/1 controller
GigabitEthernet0/1 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0015.633f.f241 (bia 0015.633f.f241)
  Description: RLH_CONNECT
  Internet address is 172.16.6.242/30
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 5/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 100Mb/s, 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 00:00:00, 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: 0/40 (size/max)
  5 minute input rate 385000 bits/sec, 191 packets/sec
  5 minute output rate 2076000 bits/sec, 253 packets/sec
     3718657093 packets input, 1382832453 bytes, 0 no buffer
     Received 75661404 broadcasts (967 IP multicast)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 75581673 multicast, 0 pause input
     0 input packets with dribble condition detected
     369672412 packets output, 560435302 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 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

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Edison Ortiz Thu, 12/03/2009 - 09:57
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Auto/Auto at each link should be the recommended configuration.


Have you tried on the 4507R:


interface gigabitethernet 3/6

switchport trunk encapsulation dot1q

switchport mode trunk



and on the 3560:


interface gigabitethernet 0/1

switchport trunk encapsulation dot1q

switchport mode trunk


Can you post the output from 'show vlan' and 'show vtp status' from both switches?


Regards


Edison.

Reza Sharifi Thu, 12/03/2009 - 10:42
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Eric,


On the 4507 it is

Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseLH


and on the 3560

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


It appears that you have speed mismatch


Reza

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