Re: catalyst3560 and citrix sessions problem

Re: catalyst3560 and citrix sessions problem

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Subject Author Date
Re: catalyst3560 and citrix sessions problem PrzemekD 05-12-2008
Posted by PrzemekD on May 12, 2008, 6:12 am
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> There are quite a few bugs in auto-qos on the 3560/3750 platform. Cisco
> had some very serious issues with dropped traffic due to QoS on the 3750

I removed all QoS related config, but problem occured few times again :(
I enabled udld aggresive on all switches and I will be observing effects...

thanks for suggestions

> This could be the source of your problem (you are running PVST+ not
> rapid-PVST+) and you are having spanning-tree issues. Do you see
> spanning-tree messages in the log with date-time stamps just before or
> during this problem?

I did not noticed any of spanning tree messages /or packets (I starded
shiffing using port SPAN and WireShark).

:(
Any other idea?

Przemek



NMFall 20%
Posted by Merv on May 12, 2008, 6:40 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

If it is being received then check if you continue to receive CDP
during an outage event

If CDP is not enabled, discuss we admin for router for vlan 4 if CDP
can be enabled for troubleshooting purpose.

You need to know if the router and the switch have a link during the
outage event.

Please post output of show interface Gi 0/4 and show interface gi 0/4
status



Posted by PrzemekD on May 13, 2008, 9:50 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



Posted by Merv on May 13, 2008, 11:00 am
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wrote:
>
> > 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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