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New Member

High latency to WLC gateway

Dear All,

I am having a problem with WCL 5508 and 3750 cisco, we are gettin a long ping time, it doesnt good working, then our same clinet doesnt take a Ip address From 5508 dhcp scope. what can i do about them.

ping time is so annoying...

3 REPLIES
VIP Purple

Re: High latency to WLC gateway

Most likely this is a connectivity issue between your switch & WLC. I would check the physical connectivity & verify no layer 2 related issues like errors, duplex issues, drops,etc

Here is sample CLI outputs I would check in the switch & WLC. Please provide same output in your case.

C3750#sh interfaces g1/0/27 | in duplex|CRC|put

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

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

  Last input 00:00:15, output 00:00:31, output hang never

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

  Output queue: 0/40 (size/max)

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

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

     28131572 packets input, 19958363087 bytes, 0 no buffer

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

     0 watchdog, 63594 multicast, 0 pause input

     0 input packets with dribble condition detected

     30743473 packets output, 19753674257 bytes, 0 underruns

     0 output errors, 0 collisions, 1 interface resets

     0 lost carrier, 0 no carrier, 0 pause output

     0 output buffer failures, 0 output buffers swapped out


(WLC) >show stats port summary  

   Link                     Pkts In  Pkts In  Pkts Out          

Pr Status Pkts In  Pkts Out Bcast    Errors   Errors   Collisions

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

1  Up     30742315 33596605    44901       0        0        0

Also provide the "show sysinfo" of your WLC

HTH

Rasika

**** Pls rate all useful responses ****

New Member

Re: High latency to WLC gateway

Dear Rasika,

so sorry my late replay because, i was ill... so you can see the details on attechment file. our problem still countine. please help us about them.


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

(Cisco Controller) >show stats port summary
   Link                     Pkts In  Pkts In  Pkts Out
Pr Status Pkts In  Pkts Out Bcast    Errors   Errors   Collisions
-- ------ -------  -------  -------  -------  -------  ----------
1  Up      2011439   987794    75253        0        0        0
2  Down      24105      668    19505        0        0        0

   Total   2035544   988462    94758        0        0        0

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


Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 7.6.100.0
Bootloader Version............................... 1.0.16
Field Recovery Image Version..................... 7.0.112.21
Firmware Version................................. FPGA 1.7, Env 1.8, USB consol
2.2
Build Type....................................... DATA + WPS

System Name...................................... TestWLC01
System Location..................................
System Contact...................................
System ObjectID.................................. 1.3.6.1.4.1.9.1.1069
Redundancy Mode.................................. Disabled
IP Address....................................... 10.1.1.2
Last Reset....................................... Power on reset
System Up Time................................... 1 days 3 hrs 20 mins 27 secs
System Timezone Location......................... (GMT +2:00) Jerusalem
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180

Configured Country............................... TR  - Turkey
Operating Environment............................ Commercial (0 to 40 C)

--More-- or (q)uit
Internal Temp Alarm Limits....................... 0 to 65 C
Internal Temperature............................. +41 C
External Temperature............................. +21 C
Fan Status....................................... OK

State of 802.11b Network......................... Enabled
State of 802.11a Network......................... Disabled
Number of WLANs.................................. 2
Number of Active Clients......................... 1

Burned-in MAC Address............................ C0:67:AF:1A:64:20
Power Supply 1................................... Present, OK
Power Supply 2................................... Present, OK
Maximum number of APs supported.................. 25

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

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

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

  Last input 00:00:18, output 00:00:00, output hang never

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

  Output queue: 0/40 (size/max)

  5 minute input rate 6000 bits/sec, 6 packets/sec

  5 minute output rate 40000 bits/sec, 28 packets/sec

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

     0 input packets with dribble condition detected

     0 output errors, 0 collisions, 1 interface resets

     0 output buffer failures, 0 output buffers swapped out

VIP Purple

Re: High latency to WLC gateway

did you upgrade this WLC to 7.6.x recently or does it come with this image ? Also when did you notice this ? If this occur after an upgrade, I would do a downgrade & test it.

If not, I would change the following one at a time & see if that helps

1. Patch lead

2. WLC port from 1 to 2 & made the necessary config change on WLC

3. 3750 Switch port to different one.

Also post output of below commands to see any config issues

(WLC) >show interface detailed management

SW# show run inter gx/x (x/x is WLC connected switchport)

HTH

Rasika

**** Pls rate all useful responses *****

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