Lot of packet drops in a Wireless LAN
Hi,
we have an issue persisting since first day of implementation.
Lot of packet drops from Wireless LAPTOP to other Wireless Laptop and
confirmed that Over Wire Nettwork they are working fine.
Our scenario is :
Interent
|
Cyberoam Firewall
|
SG- 300 POE switch
| |
Cisco 1602I Acccess points (4 qty) Cisco WLC 2504 controller
Brief description :
1. Cisco WLC is connected to Trunk port of SG-300 Switch
2. 4 Access points are connected to Access ports of SG-300 switch
3. SG-300 switch is L2 mode.
Testing carried :
1. Disable 3 Access points and worked with single Access point but no result still packet drops
2. WMM disabled and enale cleanair but no result
3. upgraded WLC 7.4.121 codee to 7.6.100 and all registration are happened but issue persists
4. Did Link test from Switch to controller and Access points , that shows fine.
Help requried :
1. How to debug (COmmands) to see why packet drops getting from a PC to other PC.
2. Did debug client <MAC> but nothing shown , is there any other commands
3. Any anlayser tools that gives why Packet drops getting
4. Over wire network , speed test showing good but wireless network speed test for internet showing less Bandwidth
Pls advice for debug the issue
Can we connect SG-300 switch in L2 mode to WLC .
Regards
Ram
we have an issue persisting since first day of implementation.
Lot of packet drops from Wireless LAPTOP to other Wireless Laptop and
confirmed that Over Wire Nettwork they are working fine.
Our scenario is :
Interent
|
Cyberoam Firewall
|
SG- 300 POE switch
| |
Cisco 1602I Acccess points (4 qty) Cisco WLC 2504 controller
Brief description :
1. Cisco WLC is connected to Trunk port of SG-300 Switch
2. 4 Access points are connected to Access ports of SG-300 switch
3. SG-300 switch is L2 mode.
Testing carried :
1. Disable 3 Access points and worked with single Access point but no result still packet drops
2. WMM disabled and enale cleanair but no result
3. upgraded WLC 7.4.121 codee to 7.6.100 and all registration are happened but issue persists
4. Did Link test from Switch to controller and Access points , that shows fine.
Help requried :
1. How to debug (COmmands) to see why packet drops getting from a PC to other PC.
2. Did debug client <MAC> but nothing shown , is there any other commands
3. Any anlayser tools that gives why Packet drops getting
4. Over wire network , speed test showing good but wireless network speed test for internet showing less Bandwidth
Pls advice for debug the issue
Can we connect SG-300 switch in L2 mode to WLC .
Regards
Ram
Craig Beck
Can you provide a show run-config output and a debug client <MAC> output from the WLC please?
ASKER
Hi ,
Attached the Debug and sh tech outputs ..
Pls do the needful by giving troubleshooting soution.
WLC connected to L2 (SG-300) Switch ..
General in what conditions packets gets dropped in Wireless LAN?
Regards
Ramu
debug-cleint.log
sh-tech
Attached the Debug and sh tech outputs ..
Pls do the needful by giving troubleshooting soution.
WLC connected to L2 (SG-300) Switch ..
General in what conditions packets gets dropped in Wireless LAN?
Regards
Ramu
debug-cleint.log
sh-tech
I need show run-config please.
ASKER
SH run is available in Sh tech file under - "Show run-config commands".Pls check
OK, I am aware that the running config is available in the show tech output.
However there's a reason I asked for a SPECIFIC command output. I want to see the AP stats which is available by issuing the show run-config command.
Please provide what I asked for.
However there's a reason I asked for a SPECIFIC command output. I want to see the AP stats which is available by issuing the show run-config command.
Please provide what I asked for.
ASKER
I will share you. but before that .
Pls clear my queiry that :
We have LAPTOPs which are AC and N comptable Wireless adapters and 1600 series access points also supports N-series %GHZ and WLC support AC and N supports then why device port peed is showings as 54Mbps instead Min 150- max 300Mbps speed..
I am from India , hope in India 5Ghz freequency bands are allowed..
Regards
Ramu
Pls clear my queiry that :
We have LAPTOPs which are AC and N comptable Wireless adapters and 1600 series access points also supports N-series %GHZ and WLC support AC and N supports then why device port peed is showings as 54Mbps instead Min 150- max 300Mbps speed..
I am from India , hope in India 5Ghz freequency bands are allowed..
Regards
Ramu
SOLUTION
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ASKER
Ok, will do that but But 802.11a supports 54 Mbps only.
Clarify me , If adapter compatible with ac or n channels , if i allow 5Ghz over WLC , they should automatically get Max through above 54Mbps. Am i correct?
Regards
Ram
Clarify me , If adapter compatible with ac or n channels , if i allow 5Ghz over WLC , they should automatically get Max through above 54Mbps. Am i correct?
Regards
Ram
SOLUTION
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ASKER
HI craigbeck,
Pls find the SH RUN file as requested,
Isssues are
1. Packet loss between same network devices over Wireless LAN
2. Over Wireless LAn devices , ISP bandwidth showing 10-12 Mbps instead 75Mbps over
Speedtest
Regards
Ramu
sh-run.txt
Pls find the SH RUN file as requested,
Isssues are
1. Packet loss between same network devices over Wireless LAN
2. Over Wireless LAn devices , ISP bandwidth showing 10-12 Mbps instead 75Mbps over
Speedtest
Regards
Ramu
sh-run.txt
Let's deal with point 2 first.
If your clients are connecting at up-to 54Mbps only they'll never achieve the 75Mbps that your internet link provides. The PHY link-rate is also always more than the data-rate. In theory the data-rate can be up-to half the PHY link-rate but due to overheads, environmental factors, etc it's always less than half. 12Mbps throughput at 2.4GHz is around what I'd expect to see with a 54Mbps link.
That leads to point 1...
How are you measuring packet loss? What tells you there is any loss, or are you just thinking there is loss because of what you believe to be slow throughput?
If your clients are connecting at up-to 54Mbps only they'll never achieve the 75Mbps that your internet link provides. The PHY link-rate is also always more than the data-rate. In theory the data-rate can be up-to half the PHY link-rate but due to overheads, environmental factors, etc it's always less than half. 12Mbps throughput at 2.4GHz is around what I'd expect to see with a 54Mbps link.
That leads to point 1...
How are you measuring packet loss? What tells you there is any loss, or are you just thinking there is loss because of what you believe to be slow throughput?
ASKER
Pls find the CHannel overlap screen shots..
Pls advice how to prevent channel overlap networks over CiscoWLC 7.6
Regards
Ramu
Overlapping-Networks-on-Cisco-AP.docx
Pls advice how to prevent channel overlap networks over CiscoWLC 7.6
Regards
Ramu
Overlapping-Networks-on-Cisco-AP.docx
That's not looking bad. The WLC will automatically choose the best channel based on RRM and CleanAir (if enabled).
You didn't answer my question...
You didn't answer my question...
How are you measuring packet loss? What tells you there is any loss, or are you just thinking there is loss because of what you believe to be slow throughput?
ASKER
No, Lots of Ping drops between Wireless Client devices in the LAN itself
Regards
Ram
Regards
Ram
I can't see any reason why you would experience packet loss. The APs can see a few rogue APs but there aren't any that would cause you a substantial issue.
RRM is doing a good job by the look of things.
A few tests...
Connect 2 clients to the same AP. Ping between them.
Connect 2 clients to different APs. Ping between them.
Connect one wireless client. Ping a wired client.
Connect one wired client. Ping a wireless client.
RRM is doing a good job by the look of things.
A few tests...
Connect 2 clients to the same AP. Ping between them.
Connect 2 clients to different APs. Ping between them.
Connect one wireless client. Ping a wired client.
Connect one wired client. Ping a wireless client.
ASKER
Why Over Wireless Nework , Internet speed showing 20Mbps around instead 80 Mbps but when the same ISP link connects to Laptop over Switch , it is giving full bandwidth
Regards
ramu
Regards
ramu
ASKER
Is WLC 2504 supports 802.11N why i am asking when i configure WLAN , it give Radio types
only a,bg,g ,all
Pls view the screenshot or am i missed any configuraito nto show n channel in the drop-down menu
regards
Ram
802.11n-issue-at-WLC.docx
only a,bg,g ,all
Pls view the screenshot or am i missed any configuraito nto show n channel in the drop-down menu
regards
Ram
802.11n-issue-at-WLC.docx
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ASKER
Hi,
Thanks for the information.It's really useful
My querie at this moment:
We have enabled 802.11b/g radio type on WLAN and enabled 802.11 N and then onwards acheived Morethan 54Mbps.
But few Wireless devices are showing 65Mbps and few are 75Mbps adapter speed.
Why it is like that..
Pls confirm ,
1. end of the day is it depends on Client device adapter specification?
2. Is there any issues wil come if we enable 802.11N in 802.11b/g
3. After enabling , client shows their radio are 802.11bn,what is 802.11bn , why it showing as 802.11bn , why it is not 802.11gn?.
4, WHy clients are not connecting SSID when enable 802.11a radio type , is it because of
client specification
Is there any tool, link or software , command which gives information about Wireless client adpater compatibility and support data rates
Regards
Ram
Thanks for the information.It's really useful
My querie at this moment:
We have enabled 802.11b/g radio type on WLAN and enabled 802.11 N and then onwards acheived Morethan 54Mbps.
But few Wireless devices are showing 65Mbps and few are 75Mbps adapter speed.
Why it is like that..
Pls confirm ,
1. end of the day is it depends on Client device adapter specification?
2. Is there any issues wil come if we enable 802.11N in 802.11b/g
3. After enabling , client shows their radio are 802.11bn,what is 802.11bn , why it showing as 802.11bn , why it is not 802.11gn?.
4, WHy clients are not connecting SSID when enable 802.11a radio type , is it because of
client specification
Is there any tool, link or software , command which gives information about Wireless client adpater compatibility and support data rates
Regards
Ram
ASKER
Waiting for reply, pls respond
SOLUTION
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ASKER
Thanks for the reply..
Overall this case , i have learnt basics on Wirelss..
Now it's time close the request..
Last one :
When i run InSSIDer tool , i have observed Co-channel interference and Overlapping
Networks
My questions are :
1. What is co-channel interference , adjacent channel interference.
2. what is the difference between both
3. Is cochannel interfernce is common in Wireless networks?
4.How can we eliminate cochannel and overlapping networks?
what is the benifit of non-overlapping channels 1,6,11 than ovelapping channels
Regards
Ramu
Overall this case , i have learnt basics on Wirelss..
Now it's time close the request..
Last one :
When i run InSSIDer tool , i have observed Co-channel interference and Overlapping
Networks
My questions are :
1. What is co-channel interference , adjacent channel interference.
2. what is the difference between both
3. Is cochannel interfernce is common in Wireless networks?
4.How can we eliminate cochannel and overlapping networks?
what is the benifit of non-overlapping channels 1,6,11 than ovelapping channels
Regards
Ramu
SOLUTION
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ASKER
Good