06-11-2009 02:58 AM - edited 07-03-2021 05:42 PM
I setup LAN-LAN bridge in my lab. with 1310(integ. antenna)
iperf.exe test results maximum 13 mbit/sec
any idea?
06-11-2009 06:50 AM
Hii ,
Iperf shows you the throughput from client to server , which depends on various factors like interference , type of traffic etc
To make sure bridge connectivity is at best data rates (54 Mbps), use the command
"show dot11 association" and check at what data rate the bridge is connected when you are getting this throughput.
06-11-2009 08:34 AM
before I test the same over 100 mbit switch
(wired-connectivity)
result is 78 mbit bandwidth.
Below is "show dot..." and runnig config
As shown current rate is 54mbit
Signal is very good
I expect nearly 30-40 mbit bandwidth
13 mbit is very low for my opinion
ap#sh dot11 associations all-client
Address : 0021.a026.bc70 Name : ap
IP Address : 192.168.10.91 Interface : Dot11Radio 0
Device : 11g-bridge Software Version : 12.3
CCX Version : NONE Client MFP : Off
State : MAC-Assoc Parent : self
SSID : cisco
VLAN : 0
Hops to Infra : 1 Association Id : 1
Clients Associated: 1 Repeaters associated: 0
Tunnel Address : 0.0.0.0
Key Mgmt type : NONE Encryption : WEP
Current Rate : 54.0 Capability : WMM ShortHdr ShortSlot
Supported Rates : 1.0 2.0 5.5 11.0 6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0
Voice Rates : disabled
Signal Strength : -22 dBm Connected for : 20232 seconds
Signal to Noise : 76 dBm Activity Timeout : 30 seconds
Power-save : Off Last Activity : 0 seconds ago
Apsd DE AC(s) : NONE
Packets Input : 4014885 Packets Output : 4085019
Bytes Input : 511245571 Bytes Output : 712893677
Duplicates Rcvd : 0 Data Retries : 8044
Decrypt Failed : 0 RTS Retries : 0
MIC Failed : 0 MIC Missing : 0
Packets Redirected: 0 Redirect Filtered: 0
Session timeout : 0 seconds
Reauthenticate in : never
ap#sh run
ap#sh running-config
Building configuration...
Current configuration : 1729 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname ap
!
enable secret 5 $1$tH1Q$qw6f1KVjymElfdtmFQKpp1
!
aaa new-model
!
!
aaa group server radius rad_eap
!
aaa group server radius rad_mac
!
aaa group server radius rad_acct
!
aaa group server radius rad_admin
!
aaa group server tacacs+ tac_admin
!
aaa group server radius rad_pmip
!
aaa group server radius dummy
!
aaa authentication login eap_methods group rad_eap
aaa authentication login mac_methods local
aaa authorization exec default local
aaa accounting network acct_methods start-stop group rad_acct
!
aaa session-id common
!
!
!
dot11 ssid cisco
authentication open mac-address mac_methods
infrastructure-ssid
!
!
!
username Cisco password 7 13261E010803
username 0021a026bc70 password 7 091C1E5B480447405D0E077D7B
username 0021a026bc70 autocommand exit
!
bridge irb
!
!
interface Dot11Radio0
no ip address
no ip route-cache
!
encryption key 1 size 128bit 7 A9E1230C15B678330C1A84143965 transmit-key
encryption mode ciphers aes-ccm tkip wep128
!
ssid cisco
!
station-role install root
bridge-group 1
bridge-group 1 spanning-disabled
!
interface FastEthernet0
no ip address
no ip route-cache
bridge-group 1
bridge-group 1 spanning-disabled
!
interface BVI1
ip address 192.168.10.90 255.255.255.0
no ip route-cache
!
ip default-gateway 192.168.10.1
ip http server
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
ip radius source-interface BVI1
radius-server attribute 32 include-in-access-req format %h
radius-server vsa send accounting
bridge 1 route ip
!
!
!
line con 0
line vty 0 4
!
end
ap#
06-11-2009 10:58 AM
Yes , you are right . 54 is the highest rate at which the connectivity can happen.
Please check the channel utilization and interference level for the channel in use.
You can try "dot11 interface-number carrier busy"
Also which tests are you doing using Iperf , TCP or UDP . IF udp try different packet sizes.
06-11-2009 12:24 PM
I test following, any idea?
ap#dot11 dot11Radio 0 carrier busy
ap#sh dot11 carrier busy
Frequency Carrier Busy %
--------- --------------
2412 12
2417 5
2422 7
2427 13
2432 13
2437 33
2442 16
2447 9
2452 2
2457 10
2462 17
2467 5
2472 2
ap#
06-27-2009 04:55 PM
Hi,
Since wireless runs half-duplex you can manage to get upto 27 mbps on a 54 mbps link.But you are getting 13 mbps. The output of this command clearly explains the reason.The output shows that the interference levels are very high in the wireless environment.This is the root cause of the degradation in the throughput.You can try to use the channel with lowest interference.channel 2472. You can lock this channel by this command:
AP(config-if)#channel 2472
And make sure (if you can)to ask the other wireless deployers in the proximity to use some other channel to reduce the interference for your mutual benefit.
Cheers,
Manish
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