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Posted by Merv on May 13, 2008, 11:00 am
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>
> > Is the router for VLAN 4 directly connected to port gi 0/4 ?
>
> > Check if the router for Vlan 4 is sending CDP on interface Gi 0/4
>
> > sh cdp nei
>
> cdp is turned off, moreover there is a Netscreen 5G (or something like that)
> on the other side. :(
>
> No line/protocol down/up messages occurs in syslog.
>
> I can not give now any other than show interface GigabitEthernet0/4
> controller ouput grabbed shortly after last "break", but here is nothing
> strange:
>
> SW3560#sh int gi0/4 controller
> GigabitEthernet0/4 is up, line protocol is up (connected)
> Hardware is Gigabit Ethernet, address is 001f.279c.2684 (bia
> 001f.279c.2684)
> 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, media type is 10/100/1000BaseTX
> input flow-control is off, output flow-control is unsupported
> ARP type: ARPA, ARP Timeout 04:00:00
> Last input never, 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 3000 bits/sec, 3 packets/sec
> 5 minute output rate 3000 bits/sec, 3 packets/sec
> 15985653 packets input, 1402420887 bytes, 0 no buffer
> Received 8159 broadcasts (0 multicasts)
> 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> 0 watchdog, 42 multicast, 0 pause input
> 0 input packets with dribble condition detected
> 22318368 packets output, 1568791617 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
>
> Transmit GigabitEthernet0/4 Receive
> 11710456 Bytes 9946272 Bytes
> 158978 Unicast frames 119594 Unicast frames
> 6979 Multicast frames 0 Multicast frames
> 1292 Broadcast frames 76 Broadcast frames
> 0 Too old frames 9941408 Unicast bytes
> 0 Deferred frames 0 Multicast bytes
> 0 MTU exceeded frames 4864 Broadcast bytes
> 0 1 collision frames 0 Alignment errors
> 0 2 collision frames 0 FCS errors
> 0 3 collision frames 0 Oversize frames
> 0 4 collision frames 0 Undersize frames
> 0 5 collision frames 0 Collision fragments
> 0 6 collision frames
> 0 7 collision frames 74958 Minimum size frames
> 0 8 collision frames 38074 65 to 127 byte frames
> 0 9 collision frames 4206 128 to 255 byte frames
> 0 10 collision frames 1390 256 to 511 byte frames
> 0 11 collision frames 518 512 to 1023 byte frames
> 0 12 collision frames 524 1024 to 1518 byte
> frames
> 0 13 collision frames 0 Overrun frames
> 0 14 collision frames 0 Pause frames
> 0 15 collision frames
> 0 Excessive collisions 0 Symbol error frames
> 0 Late collisions 0 Invalid frames, too
> large
> 0 VLAN discard frames 0 Valid frames, too large
> 0 Excess defer frames 0 Invalid frames, too
> small
> 27168 64 byte frames 0 Valid frames, too small
> 139581 127 byte frames
> 109 255 byte frames 0 Too old frames
> 278 511 byte frames 0 Valid oversize frames
> 21 1023 byte frames 0 System FCS error frames
> 92 1518 byte frames 0 RxPortFifoFull drop
> frame
> 0 Too large frames
> 0 Good (1 coll) frames
> 0 Good (>1 coll) frames
You need to find out ALL of the devices between your switch and the
default gateway router and create a network topology diagram with all
of the information.
Also there needs to be an agreed upon troubleshooting process between
all parties that support these devices
For example the problem in question might be caused by the
firewall ...
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