Port Channel producing slow results

jmalge · ‎03-18-2013

Hello all. I'm having an issue with a port channel. This port channel is set up for a NAS device and the server group is complainging that it's taking too long for their backup to run. I verified in Orion that the ports in the etherchannel are only receiving 1.4 mbps of data. Other port channels are as much as 500+ mbps.

We are looking for differences in the port channels but are having issues coming across them. I thought I would give everyone here a shot at it. Here is the configs and other results below.

FR0001#show etherchannel 353 det

Group state = L2

Ports: 2 Maxports = 16

Port-channels: 1 Max Port-channels = 16

Protocol: LACP

Minimum Links: 0

Ports in the group:

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

Port: Gi1/1/3

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

Port state = Up Mstr In-Bndl

Channel group = 353 Mode = Passive Gcchange = -

Port-channel = Po353 GC = - Pseudo port-channel = Po353

Port index = 0 Load = 0xFF Protocol = LACP

Flags: S - Device is sending Slow LACPDUs F - Device is sending fast LACPDUs.

A - Device is in active mode. P - Device is in passive mode.

Local information:

LACP port Admin Oper Port Port

Port Flags State Priority Key Key Number State

Gi1/1/3 SP bndl 32768 0x161 0x161 0x1104 0x3C

Partner's information:

Partner Partner LACP Partner Partner Partner Partner Partner

Port Flags State Port Priority Admin Key Oper Key Port Number Port State

Gi1/1/3 SA bndl 255 0x0 0x11 0x1 0x3D

Age of the port in the current state: 667d:20h:09m:45s

Port: Gi2/1/3

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

Port state = Up Mstr In-Bndl

Channel group = 353 Mode = Passive Gcchange = -

Port-channel = Po353 GC = - Pseudo port-channel = Po353

Port index = 1 Load = 0xFF Protocol = LACP

Flags: S - Device is sending Slow LACPDUs F - Device is sending fast LACPDUs.

A - Device is in active mode. P - Device is in passive mode.

Local information:

LACP port Admin Oper Port Port

Port Flags State Priority Key Key Number State

Gi2/1/3 SP bndl 32768 0x161 0x161 0x2104 0x3C

Partner's information:

Partner Partner LACP Partner Partner Partner Partner Partner

Port Flags State Port Priority Admin Key Oper Key Port Number Port State

Gi2/1/3 SA bndl 255 0x0 0x11 0x2 0x3D

Age of the port in the current state: 667d:20h:10m:27s

Port-channels in the group:

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

Port-channel: Po353 (Primary Aggregator)

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

Age of the Port-channel = 24d:05h:26m:35s

Logical slot/port = 46/28 Number of ports = 2

HotStandBy port = null

Port state = Port-channel Ag-Inuse

Protocol = LACP

Fast-switchover = disabled

Load share deferral = disabled

Ports in the Port-channel:

Index Load Port EC state No of bits

------+------+------------+------------------+-----------

0 FF Gi1/1/3 Passive 8

1 FF Gi2/1/3 Passive 8

Time since last port bundled: 20d:03h:36m:36s Gi2/1/3

Time since last port Un-bundled: 20d:04h:58m:37s Gi2/4/17

Last applied Hash Distribution Algorithm: Fixed

FR0001#show run int po353

Building configuration...

Current configuration : 97 bytes

!

interface Port-channel353

description Tier 3 Storage

switchport

switchport mode access

end

FR0001#show run int gi1/1/3

Building configuration...

Current configuration : 134 bytes

!

interface GigabitEthernet1/1/3

description Tier 3 Storage

switchport

switchport mode access

channel-group 353 mode passive

end

FR0001#show run int gi2/1/3

Building configuration...

Current configuration : 134 bytes

!

interface GigabitEthernet2/1/3

description Tier 3 Storage

switchport

switchport mode access

channel-group 353 mode passive

end

From show etherhchannel summary detail

353 Po353(SU) LACP Gi1/1/3(P) Gi2/1/3(P)

I appreciate your help.

paul driver · ‎03-18-2013

hello
how did you create the port channel?

i mean did you let the router/switch create it when the interfaces were configured?

try and delte the port channel

conf t
no int port 353

delete your physical interface
default int ran gig1/1/1 ,gig2/1/1

recreate the interfaces and assign

channel-group xxx mode active
channel protocol lacp

once this is done your port-channel will be created automatically

res
Paul

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Kind Regards
Paul

jmalge · ‎03-19-2013

I created the port channel manually which I had done several times in the past. This is the first instance where we have actually seen poor performance.

I'm going to try this and see how it works.

paul driver · ‎03-19-2013

Hello Jason,

I have found in the past some etherchannel issues have a rose from manually creation of the port-channel,

Configuring the physical interfaces ( routed/switched/access) into an ehterchannel and then letting the router/switch create the port-channel seems to provide a much cleaner and less problematic aggregate link.

res

Paul

Please don't forget to rate any posts that have been helpful.

Thanks.

Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

Leo Laohoo · ‎03-18-2013

Can you please post the output to the commands "sh interface "?

If this is a 3750-series please add the following commands "sh controll util" and "sh controll e ".

jmalge · ‎03-19-2013

FR0001#show int gi1/1/3

GigabitEthernet1/1/3 is up, line protocol is up (connected)

Hardware is C6k 1000Mb 802.3, address is 0022.90fb.751a (bia 0022.90fb.751a)

Description: Tier 3 Storage

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, media type is 10/100/1000BaseT

input flow-control is off, output flow-control is on

Clock mode is auto

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

Last input never, output 00:00:17, 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 28000 bits/sec, 38 packets/sec

284039399 packets input, 21227923238 bytes, 0 no buffer

Received 119823 broadcasts (119807 multicasts)

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

74298243 packets output, 7562800490 bytes, 0 underruns

0 output errors, 0 collisions, 3 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

FR0001#show int gi2/1/3

GigabitEthernet2/1/3 is up, line protocol is up (connected)

Hardware is C6k 1000Mb 802.3, address is 0022.905c.9066 (bia 0022.905c.9066)

Description: Tier 3 Storage

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, media type is 10/100/1000BaseT

input flow-control is off, output flow-control is on

Clock mode is auto

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

Last input never, output 00:00:36, output hang never

Last clearing of "show interface" counters never

Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 9

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 118000 bits/sec, 111 packets/sec

397607 packets input, 51395008 bytes, 0 no buffer

Received 72259 broadcasts (61506 multicasts)

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

2358686042 packets output, 3285777351338 bytes, 0 underruns

0 output errors, 0 collisions, 6 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

Leo Laohoo · ‎03-19-2013

I don't see anything wrong with the above output.

Do an extended (and continous) ping from the host to host and see what the results are.