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3640 to cat3548 ISL Trunk error on interfaces both ends of link

I have a 3640 with a 2 port FE card and a 1port FE card(NM-1FE-TX). Each port is connected as a trunk (ISL) to three seperate 3548 switches. No errors on the 2port card but errors on the single port card and on the switch port on the switch which terminates the trunk. Changed interface and switch and cable same errors.

Any ideas as to cause?

The errors are drop packets in the router and CRC errors in the switch:

Keith.

errors shown here:

ROUTER

show int fa1/0 sum

*: interface is up

IHQ: pkts in input hold queue IQD: pkts dropped from input queue

OHQ: pkts in output hold queue OQD: pkts dropped from output queue

RXBS: rx rate (bits/sec) RXPS: rx rate (pkts/sec)

TXBS: tx rate (bits/sec) TXPS: tx rate (pkts/sec)

TRTL: throttle count

Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL

----------------------------------------------------------------------

* FastEthernet1/0 0 696492 0 0 3000 6 2000 3 0

NOTE:No separate counters are maintained for subinterfaces

Hence Details of subinterface are not shown

NAPRT1#show int fa0/0 sum

*: interface is up

IHQ: pkts in input hold queue IQD: pkts dropped from input queue

OHQ: pkts in output hold queue OQD: pkts dropped from output queue

RXBS: rx rate (bits/sec) RXPS: rx rate (pkts/sec)

TXBS: tx rate (bits/sec) TXPS: tx rate (pkts/sec)

TRTL: throttle count

Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL

----------------------------------------------------------------------

* FastEthernet0/0 0 0 0 0 4000 7 3000 4 0

NOTE:No separate counters are maintained for subinterfaces

Hence Details of subinterface are not shown

NAPRT1#show int fa0/1 sum

*: interface is up

IHQ: pkts in input hold queue IQD: pkts dropped from input queue

OHQ: pkts in output hold queue OQD: pkts dropped from output queue

RXBS: rx rate (bits/sec) RXPS: rx rate (pkts/sec)

TXBS: tx rate (bits/sec) TXPS: tx rate (pkts/sec)

TRTL: throttle count

Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL

----------------------------------------------------------------------

* FastEthernet0/1 0 168 0 0 7000 14 14000 10 0

NOTE:No separate counters are maintained for subinterfaces

Hence Details of subinterface are not shown

RT1#show int fa1/0

FastEthernet1/0 is up, line protocol is up

Hardware is AmdFE, address is 0008.2190.58d0 (bia 0008.2190.58d0)

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)

Full-duplex, 100Mb/s, 100BaseTX/FX

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: 0/75/696492/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue :0/40 (size/max)

5 minute input rate 3000 bits/sec, 5 packets/sec

5 minute output rate 2000 bits/sec, 2 packets/sec

2560629 packets input, 150821824 bytes

Received 57039 broadcasts, 0 runts, 0 giants, 0 throttles

355951 input errors, 0 CRC, 0 frame, 355951 overrun, 0 ignored

0 watchdog

0 input packets with dribble condition detected

4882013 packets output, 2967272779 bytes, 0 underruns

0 output errors, 0 collisions, 10 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

SWITCH

how int fa0/48 sw

Name: Fa0/48

Switchport: Enabled

Administrative mode: trunk

Operational Mode: trunk

Administrative Trunking Encapsulation: isl

Operational Trunking Encapsulation: isl

Negotiation of Trunking: Disabled

Access Mode VLAN: 0 ((Inactive))

Trunking Native Mode VLAN: 1 (default)

Trunking VLANs Enabled: ALL

Trunking VLANs Active: 1-7

Pruning VLANs Enabled: 2-1001

Priority for untagged frames: 0

Override vlan tag priority: FALSE

Voice VLAN: none

Appliance trust: none

switch1A#show int fa0/48

FastEthernet0/48 is up, line protocol is up

Hardware is Fast Ethernet, address is 0009.7c48.0870 (bia 0009.7c48.0870)

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

reliability 254/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive not set

Auto-duplex (Full), Auto Speed (100), 100BaseTX/FX

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:48, output 00:00:00, output hang never

Last clearing of "show interface" counters 03:23:53

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

5 minute input rate 3000 bits/sec, 3 packets/sec

5 minute output rate 5000 bits/sec, 7 packets/sec

4881315 packets input, 2840592245 bytes

Received 4892 broadcasts, 0 runts, 0 giants, 0 throttles

1156 input errors, 1156 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 193 multicast

0 input packets with dribble condition detected

4647387 packets output, 309160702 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

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1 REPLY

Re: 3640 to cat3548 ISL Trunk error on interfaces both ends of l

Often times complex troubleshooting issues are best addressed in an interactive session with one of our trained technical assistance engineers. While other forum users may be able to help, it’s often difficult to do so for this type of issue.

To utilize the resources at our Technical Assistance Center, please visit http://www.cisco.com/tac and to open a case with one of our TAC engineers, visit http://www.cisco.com/tac/caseopen

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

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