Channel bonding

Hi,
Need some advise here. My faculty of architecture decided to go all wireless this year. I've design the wireless network with a high density of 5Ghz APs. When a look at the stats, I dont have any legacy 802.11a device. Since I have a lot of user cramped in a small building and they need to send very large file, does it make more sense to use 20Mhz or 40Mhz channel. Right now, with 20 Mhz channel, I dont overlap but with 40...I've sure there will be some in the most cramped area. Advice....
Typical use a the network is sending CAD files(building plans) of 100MB to 500MB. Many one file directly from NFS servers...some could say that wireless is no good for this type of usage...but try gaining the authorisation to put wall jack in a historic building built in 1670.

Hello Dominic,
The question to bond or not to bond, that is the real question. And my advice, BOND.
The 5 GHz side allows for many more channelsm even with hi density you can still design a network with limited over coverage. Lets look at the basic UNIIs.
UNII 1 - 4 channel
UNII 2 - 4 channel
UNII 3 - 4 channels
Just using the basic UNIIs you have a total of 6 channels to deisgn with, thats double what we have on the 2.4 GHz side. A few things you might know already, but will cover for good measure.
When you bond and take advantage of 802.11n rates you need to insure WMM is supported on the WLAN. You also need to use WPA2/AES. If you dont meet these 2 items, no 802.11n for you.
When 2 channels are bonded, 1 channel will act as your managment, meaning this is where your beacons will come out of. This allows legacy devices (802.11a) to see and use the medium if they dont support 802.11n 40 MHz.
Only problem I would be aware of, based on my expereince. Is neigboring access points that may also be bonding and causing you interference.
I hope this helps ..

Similar Messages

Linksys E4200 is not channel bonding

I have been trying for weeks to figure out why my linksys E4200 would not do 300 mbps I think I came up with the answer the firmware is not allowing it to channel bond on the 2.4ghz channel in my old 160n when I change the channel width to 20 to 40mhz it shows 40mhz only in the status of the router in the E4200 it shows 20mhz only is this a firmware problem and how do you inform linksys of it there tech support is pretty much useless.

dkjohn - sorry I do not have an answer. I started a similar thread yesterday titled E4200 2.4G 40mhz bandwidth issues, no responses yet. I can get channel bonding using channel 6, or auto which gives me channel 6, no other channels will bond. When bonded the channels are 6 & 2. Unfortunately after 4 minutes of either laptop being booted up, The router drops from 40 mhz to 20 mhz and the channels report 6 & 0. If I have no wireless PC's on the router will stay at 40 mhz and channels 6 & 2 "forever". Not sure if this is firmware or a defective router.

Anyone get a 300 Mbit link speed using 40 MHz (Channel-Bonding) on 802.11n?

I recently switched from a MacBook Pro 2.33 C2D 15 to a new MacBook Air 1.86 SSD... For some reason, one little persistent mystery that remains, is that I have been unable to get the Air to establish the link speed at 300 Mbit/s at 40 Mhz (Channel-Bonded). The best I can get is 270 Mbit/s, although my MacBook Pro consistently links at maximum. Signal quality is not an issue...
Anyone have an idea why? Can an Air owner out there confirm max link, or is this little gem incapable of 802.11n wide 300 Mbit/s?
Thanks to anyone who can shed light on this little puzzle...

Thanks for the reply.
First, you need your TC's 'Radio Mode' set to '802.11n only (5 Ghz)' - (I assume you do, since I don't think the 'Use wide channels' option should appear in any other mode...).
Now, the quick method to check Link Speed is in the 'Network Utility' Info tab...
Note that I don't have a major issue with my transfer rates, but do think it's an anomaly for a MacBook Pro to consistently link at 300 Mbit/s and my Air to refuse the same (max 270). In general, I would say that my Air exhibits (a bit) less sensitivity than the Pro with consistent wireless performance (i.e., I never had issues with the Pro acquiring and maintaining wireless links - the Air less so...).
Thanks for your help.

Channel Bonding? Oracle RAC with multiple redundant network

We are planning on setting up on Oracle RAC 10g on Linux.
We have redundant switches, so I would like to set up the network to have some version of network redundancy.
Under windows, it is called 'teaming'. Linux is 'channel-bonding'
I just want to make sure if I setup the channel-bonded interfaces, it will be supported with RAC. Has anyone done this before??
-Andy

we are running our RAC on NIC bonding. Although we need to do some more testing to be real sure as to the functionality of the bond.
Metalink Note:298891.1 would be a good place to start.
hth,
-S

Is anyone using a 1252 ap in bridge mode with channel bonding?

Is anyone using a 1252 ap in bridge mode, with channel bonding?
I had a question a while ago from a customer with regards to bridging with a 1252 ap to increase throughput for a wireless link he was using, from the throughput improvements in 802.11n. At the time I spoke to Cisco Pre-Sales, and they indicated that the bridge function in the 1252 exists for 'testing' purposes. I advised our customer that although it should be possible to implement, we may run into difficulties with TAC support ect. in the event of problems with the link.
Can anyone comment if this is a Cisco validated/approved design now?
Also, has anyone done this and tested the throughput achievable?
Has anyone bridged both 2.4Ghz and 5Ghz radios on a 1252?
The reason I ask is I've seen a note about a Cisco 5Ghz 802.11n bridge being launched.
Thanks in advance.
Alex.

Hi All,
Thanks for all the feedback; I have finally done some throughput testing with the 1252's. Please note, this is very rough, just to give an idea on throughput that's achievable, and what you can enable. Did this a few weeks back, and have now wiped the cnf, so dont have the show runs any more....
The two devices were set up a few feet apart, with the standard 2dBi and 3dBi antenna.
All tests done on the 5GHz radio with Autonomous AP IOS.
I did data transfers via a laptop either end of the link; transferring data using the Test TCP utility (wasn't going for scientific tests, just getting some idea of throughput).
802.11a @ 54mbs (20Mhz chan) WGB - root to non root = 2.43 - 2.5MB/Sec = 19.44 - 20 Mbps
802.11a @ 54mbs (20Mhz chan) WGB non root to root = 2.42 - 2.44MB/Sec = 19.44 - 20 Mbps
802.11n @ 'n' rates( 20Mhz chan) WGB root to non root = 6.18 - 6.33MB/Sec = 49.44 - 50.64 Mbps
802.11n @ 'n' rates ( 20Mhz chan) WGB non root to root = 4.77 - 5.00MB/Sec = 38.16 - 40 Mbps
802.11n @ 'n' rates ( 40Mhz chan) WGB root to non root = 8.59 - 8.58MB/Sec = 68.64 - 68.64 Mbps
802.11n @ 'n' rates ( 40Mhz chan) WGB non root to root = 6.35 - 7.20MB/Sec = 50.8 - 57.6 Mbps
802.11n @ 'n' rates ( 40Mhz chan) Bridge root to non root = 9.73 - 10MB/Sec = 77.84 - 80 Mbps
802.11n @ 'n' rates ( 40Mhz chan) Bridge non root to root = 8.40 - 8.57MB/Sec = 67.2 - 68.56 Mbps
So basically, as per the above posts, you can implement bridging on the 1252's and utilise the 802.11n rates and features, SGI, Spatial Streams and Channel Bonding etc, to achieve higher throughput.
Also, as per the above posts, this is still not supported by Cisco, so, in my case, I'd be highlighting that to customers straight off, but don't see it as too much of an impediment to deploy, as long as the customer weighs up the risks.
On a side note, I attended a Cisco session recently, and was told that the 802.11n Bridge, (the 1430?) was on hold indefinitely. My feeling is that this makes it more pressing that Cisco introduces support for bridging on the 1252.
Get in the ear of your local Wireless SE's, the more they hear it, the more they'll moan to the Wireless BU in San Jose! ;-)
Bridging with 802.11n has some interesting possibilities, I worked with Alvarion 5GHz bridges 6 or 7 years ago, that could do 'near LOS' - Worked well in cities, using reflection of the RF from buildings. I had never heard of 802.11n back then, but I'm guessing Alvarion was using MIMO to achieve good non-LOS connectivity in the 5GHz band.
Cheers,
Alex.

How to tell if client is channel bonding from WLC end?

Greetings,
I'm reading that if the WLC client detail shows rates m7 - m15, then it must be a 40Mhz wide channel (bonded 20's). However, I'm seeing those rates on 2.4 clients as well, which would be impossible, since those are not bonded. I'm looking at a 4402 running 7.0.240.0.
Is the 2.4 reading just buggy? Different rules for 2.4 MCS? Why doesn't Cisco simply show the Mbps like the client itself does rather than leaving us with this MCS mXX hieroglyph? :-)
Thanks!
Gary

So long as the rate is avaialber and the client has RSSI/SNR to support it, it can connect at that rate. There are diffferent rates for 20 vs 40 wide, as well as the guard interval.
http://en.wikipedia.org/wiki/802.11n#Data_rates
HTH,
Steve
Please remember to rate useful posts, and mark questions as answered

Airport Extreme Channel Bonding

Does anyone know if the Airport Extreme Base Station (802.11n) supports channel bonding. Channel bonding of course is setting both the base station and the airport card in the computer to use 2 of the 11 channels instead of just 1 in order to achieve a full 300Mbs data rate.
And I'm not talking about the setting for combined b/g/n operation, that's something different...
Thanks,
-Chris

The AirPorts only support "channel bonding" on the 5 GHz radio when the "Use wide channels" option is enabled. They do not support a similar feature for the 2.4 GHz radio.

[Cisco FAQ] - What is DOCSIS 3.0 Upstream Channel Bonding?

describe what it does.

DOCSIS 3.0 required that CM must have 4 or more upstream channel transmitters. This translates into the
possibility of 100mbps+ upstream rate…
Removed DOCSIS 2.0/1.x single request-grant cycle bottleneck.
Bonded Flows allow multiple outstanding BW-REQ.
BW can be requested on any of the bonded upstream channels
Requests can be granted on any of the bonded upstream channels
Reduced upstream latency (TCP ACK) also increases DS throughput. [TCP application]
Bonds multiple, physical upstream transmit channels to form a larger, logical upstream channel.

How to create network teaming or channel bond

hi
how to create bond0 and bon1 for RAC installation between two nodes??
node1
[grid1@rac-1 ~]$ /sbin/ifconfig
eth0      Link encap:Ethernet HWaddr 00:00:E8:F7:02:B0
          inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
          inet6 addr: fe80::200:e8ff:fef7:2b0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:20571 errors:0 dropped:0 overruns:0 frame:0
          TX packets:19190 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:10508240 (10.0 MiB) TX bytes:9218545 (8.7 MiB)
          Interrupt:177 Base address:0x8400
eth1      Link encap:Ethernet HWaddr 00:26:18:59:EE:49
          inet addr:192.168.181.10 Bcast:192.168.181.63 Mask:255.255.255.192
          inet6 addr: fe80::226:18ff:fe59:ee49/64 Scope:Link
          UP BROADCAST MULTICAST MTU:1500 Metric:1
          RX packets:49 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:23
          collisions:0 txqueuelen:1000
          RX bytes:18391 (17.9 KiB) TX bytes:0 (0.0 b)
          Memory:fe9c0000-fea00000
lo        Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:16332 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16332 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:16738217 (15.9 MiB) TX bytes:16738217 (15.9 MiB)
virbr0    Link encap:Ethernet HWaddr 00:00:00:00:00:00
          inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:47 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b) TX bytes:10062 (9.8 KiB)
[grid1@rac-1 ~]$ node2
[root@rac-2 ~]# ifconfig
eth0      Link encap:Ethernet HWaddr 00:1D:72:39:3A:E4
          inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
          inet6 addr: fe80::21d:72ff:fe39:3ae4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:6765 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7040 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:3922791 (3.7 MiB) TX bytes:1079834 (1.0 MiB)
          Interrupt:169
eth2      Link encap:Ethernet HWaddr 00:00:00:00:00:00
          inet addr:192.168.181.20 Bcast:192.168.181.63 Mask:255.255.255.192
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b) TX bytes:7029 (6.8 KiB)
lo        Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:4970 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4970 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:7648305 (7.2 MiB) TX bytes:7648305 (7.2 MiB)
virbr0    Link encap:Ethernet HWaddr 00:00:00:00:00:00
          inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:54 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b) TX bytes:10706 (10.4 KiB)
[root@rac-2 ~]# ifconfig
eth0      Link encap:Ethernet HWaddr 00:1D:72:39:3A:E4
          inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
          inet6 addr: fe80::21d:72ff:fe39:3ae4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:6767 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7044 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:3923027 (3.7 MiB) TX bytes:1080210 (1.0 MiB)
          Interrupt:169
eth2      Link encap:Ethernet HWaddr 00:00:00:00:00:00
          inet addr:192.168.181.20 Bcast:192.168.181.63 Mask:255.255.255.192
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:37 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b) TX bytes:9982 (9.7 KiB)
lo        Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:4970 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4970 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:7648305 (7.2 MiB) TX bytes:7648305 (7.2 MiB)
virbr0    Link encap:Ethernet HWaddr 00:00:00:00:00:00
          inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:54 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b) TX bytes:10706 (10.4 KiB)
[root@rac-2 ~]# i have done till now....
Configure Network Bonding
In /etc/modprobe.conf add line:
alias bond0 bonding
alias bond1 bonding
options bonding miimon=100 mode=1 max-bonds=2
(mode=1? means active/passive failover see bonding.txt in kernel sources for more options)
/etc/sysconfig/network-scripts/ifcfg-bond0 looks like:
DEVICE=bond0
BOOTPROTO=none
ONBOOT=yes
NETWORK=192.168.181.10
NETMASK=255.255.255.192
IPADDR=192.168.181.20
USERCTL=no
/etc/sysconfig/network-scripts/ifcfg-eth0 looks like:
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=yes1)what to do get my access to adsl modem?
2)what to do on node2?
i am facing some error when i am installing clusterware bcz the interface names are different in each node.and public and private ip NICs are in different order.
will this bonding solute out this issue?
regards
Edited by: you on Apr 25, 2010 2:00 AM
following the steps from here(but its done on vm-ware):
http://blog.ronnyegner-consulting.de/2009/09/14/oracle-11g-release-2-install-guide-%E2%80%93-grid-infrastructure-installation/

Why do you want to use bonding? If this is not a real RAC, what do you want to achieve by bonding?
I do not see a dedicated Interconnect interface. Node 1 has NIC eth1 and node 2 has NIC eth2. One of the basics for RAC is to have the same configuration on each node. So if node 1 uses eth1 for public/virtual/private networking, then so should every other node in the cluster.
If you bond eth0 and eth1, then what do you want to use for your Interconnect? The same bond0 interface that is now used for your RAC's public and virtual interface configuration?
Make sure you understand the basic requirements for a RAC configuration. Make sure you adhere to these - even in a virtualised environment.

Wide channel bonding?

I recently upgraded my home network from a G router to a draftN router. However I have not noticed any increase in speed.
It's connected on channel 1 (2.4ghz)
But the transmit rate is 73 and the MCS index is 7.
So my buddy who has a Dell laptop with Win7 comes over and he shows me that my router is on 20mhz channel width. He changes that to 20/40. Then in Windows on his Dell he goes into the properties of the network connection configuration and changes a similar setting in there. Now he is showing speeds of 150mbps. He says that this setting has to be switched on all Windows computers. And if I did that on my Macbook Pro then I would see my 73mbps increase to 150 just like his.
Is there a way to force my MBP to "see" and use the 40mhz width?

I realize I am never going to get 300mbps from this draftN router (it's a Tenda for what that's worth) but Network Util is reporting 72mbps which is nowhere close to numbers I've been seeing on other posts like 130, 150, and even 270.
As for returning it, I don't think so. I got it on sale. Was really marked down. Now I see the price of cheap technology.

NIC Bonding not behaving as it should

Hi Folks, am trying to setup NIC bonding on my VM (OEL5u6) having two virtualised NICs, i have done the setup which is quite simple however my active-backup mode is not working as expected.
My Bonded interface
[root@Gateway network-scripts]# cat ifcfg-bond0
DEVICE=bond0
IPADDR=192.169.25.2
NETMASK=255.255.255.248
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
BONDING_OPTS='mode=active-backup miimon=1000'
TYPE=Ethernet
individual interfaces
[root@Gateway network-scripts]# cat ifcfg-eth2
DEVICE=eth2
HWADDR=08:00:27:1e:57:cf
MASTER=bond0
SLAVE=yes
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
[root@Gateway network-scripts]# cat ifcfg-eth4
DEVICE=eth4
HWADDR=08:00:27:46:69:69
MASTER=bond0
SLAVE=yes
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
Bonding status (looks good)
[root@Gateway network-scripts]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.5.0 (November 4, 2008)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth2
MII Status: up
MII Polling Interval (ms): 1000
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth2
MII Status: up
Link Failure Count: 0
Permanent HW addr: 08:00:27:1e:57:cf
Slave Interface: eth4
MII Status: up
Link Failure Count: 0
Permanent HW addr: 08:00:27:46:69:69
I am doing a continous ping from another host in the same n/w to this bonded interface IP to check if the ping streak breaks when i test this setup
Testing -
[root@Gateway network-scripts]# ifenslave -c bond0 eth4
and that's it my SSH connection is gone, and ping is broken with "Request timed out"
when i check the bond status now -
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth4
MII Status: up
MII Polling Interval (ms): 1000
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth2
MII Status: up
Link Failure Count: 0
Permanent HW addr: 08:00:27:1e:57:cf
Slave Interface: eth4
MII Status: up
Link Failure Count: 0
Permanent HW addr: 08:00:27:46:69:69
am afraid there's not much help in the message log to debug this.
Any views what's wrong and how to resolve? appreciate ur replies. Thanks
Regards Amit

Hi,
I'm having the same problem, when i disconnect the cable from the eth0 (active slave) stop receiving respond
I have tried bridged conf and interal net.
I'm using VirtualBox 4.1.16
This is my conf:
[root@integrador ~]# cat /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
IPADDR=10.10.0.2
NETWORK=10.10.0.0
NETMASK=255.255.255.0
BONDING_OPTS="mode=1 miimon=100"
BOOTPROTO=none
ONBOOT=yes
[root@integrador ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=none
MASTER=bond0
SLAVE=yes
USERCTL=no
[root@integrador ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
ONBOOT=yes
BOOTPROTO=none
MASTER=bond0
SLAVE=yes
USERCTL=no
[root@integrador ~]# cat /etc/modprobe.d/bonding.conf
alias bond0 bonding
[root@integrador ~]# ifconfig -a
bond0 Link encap:Ethernet HWaddr 08:00:27:5C:C5:BA
inet addr:10.10.0.2 Bcast:10.10.0.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fe5c:c5ba/64 Scope:Link
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:402 errors:0 dropped:0 overruns:0 frame:0
TX packets:92 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:39487 (38.5 KiB) TX bytes:11045 (10.7 KiB)
eth0 Link encap:Ethernet HWaddr 08:00:27:5C:C5:BA
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:211 errors:0 dropped:0 overruns:0 frame:0
TX packets:89 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:23061 (22.5 KiB) TX bytes:10863 (10.6 KiB)
eth1 Link encap:Ethernet HWaddr 08:00:27:5C:C5:BA
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:191 errors:0 dropped:0 overruns:0 frame:0
TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:16426 (16.0 KiB) TX bytes:182 (182.0 b)
eth2 Link encap:Ethernet HWaddr 08:00:27:DF:11:A2
inet addr:192.168.57.1 Bcast:192.168.57.3 Mask:255.255.255.252
inet6 addr: fe80::a00:27ff:fedf:11a2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:1142 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:119508 (116.7 KiB)
eth3 Link encap:Ethernet HWaddr 08:00:27:D1:41:9A
inet addr:192.168.1.50 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fed1:419a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:825 errors:0 dropped:0 overruns:0 frame:0
TX packets:625 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:563221 (550.0 KiB) TX bytes:85914 (83.9 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:25 errors:0 dropped:0 overruns:0 frame:0
TX packets:25 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2690 (2.6 KiB) TX bytes:2690 (2.6 KiB)
[root@integrador ~]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth0
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth0
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 08:00:27:5c:c5:ba
Slave queue ID: 0
Slave Interface: eth1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 08:00:27:fc:6b:f6
Slave queue ID: 0
[root@integrador ~]# lsmod | grep -i bond
bonding 109558 0
ipv6 264641 39 cnic,bonding,ip6t_REJECT,nf_conntrack_ipv6,nf_defrag_ipv6
[root@integrador ~]# uname -a
Linux integrador 2.6.32-220.el6.i686 #1 SMP Tue Dec 6 16:15:40 GMT 2011 i686 i686 i386 GNU/Linux
Sorry for my english!

Using Wide Channel in draft-n routers

Hi all,
I've recently purchased the WRT310N router together with a WPC600N PCMCIA card for use in my notebook. I have other 802.11G devices at home (a SqueezeBox, another notebook with built-in G adapter and a BlackBerry Bold) which connect to the new router as well. Over the last 2 weeks, my wireless network has been practically unusable, requiring resets every couple of hours or twice daily at best. I've tried most of the recommendations from this forum - hard-resets; changing parameters like beacon interval etc..; changing to different channels (wide & standard), none of this really helped.
I then researched on the 802.11n standard and I think the firmware from Linksys seems to have some fundamental problem on the "wide channel" option. From various sources on the web, the "channel bonding" feature of 802.11n will utilise two ADJACENT and NON-OVERLAPPING 20MHz channels together to increase the overall bandwidth. As we all know, in the 2.4GHz band, if we start from channel 1, there could only be 3 non-overlapping channels altogether - CH1, CH6 and CH11. However, in the firmware of my WRT310N, if I choose CH6 as the wide channel, I'd be given the choice of either CH4 or CH8 as the standard channel. As each channel will need 20MHz but is only 5MHz apart from the adjacent channel, both CH4 or CH8 will directly interfere with CH6, causing unstable transmission/reception. I believe what the firmware should do when you choose CH6 as the wide channel is to give you only CH1 or CH11 as the standard channel.
With the above in mind, I disabled the wide channel option totally, my WPC600N now runs at a much lower bandwidth but the stability for my whole network has improved a lot (I haven't had a reboot since the last 24 hrs). Can someone confirm if my theory above is correct or not?
Regards,
Paul.

What all things which you wrote, its right but there are certain things which you need to adjust more on your Router, that will solve your problem.
Open an Internet Explorer browser page on your wired computer(desktop).In the address bar type - 192.168.1.1
Leave username blank & in password use admin in lower case...
For Wireless Settings, please do the following : -
Click on the Wireless tab
-Here select manual configuratioon...Wireless Network mode should be mixed...
-Provide a unique name in the Wireless Network Name (SSID) box in order to differentiate your network from your neighbours network...
- Set the Radio Band to Wide-40MHz and change the Wide channel to 9 and Standard Channel to 11-2.462GHz...Wireless SSID broadcast should be Enabled and then click on save settings...
Please make a note of Wireless Network Name (SSID) as this is the Network Identifier...
For Wireless Security : -
Click on the Sub tab under Wireless > Wireless Security...
Change the Wireless security mode to WEP, Encryption should be 64 bits.Leave the passphrase blank, don't type in anything...
Under WEP Key 1 type in any 10 numbers please(numbers only and no letters) and click on save settings...
Please make a note of WEP Key 1 as this is the Security Key for the Wireless Network.Now try if you could see the Wireless Network Name/SSID and try to connect...
Click on Advanced Wireless
settings>>Change the Beacon Interval to 75 >>Change the Fragmentation...
Threshold to 2304 Change the RTS Threshold to 2307 >>Click on "Save Settings"...
Now see if you can locate your Wireless Network and attempt to connect...

Ipad can't get maximum of 802.11n (40 Mhz channel, 300 Mbps)

Hi, Gens!
I have TP-Link 1043 with OpenWRT. My WiFi is 802.11n with 20 MHz width at 2,4 GHz and 40Mhz width at 5,2 MHz.
Encryption is WPA2 with AES
My laptop connects at follwoing RX/TX rates:
180.0 Mbit/s, MCS 12, 40MHz
270.0 Mbit/s, MCS 14, 40MHz
We can see everything goes fine and 40 MHz wide frequency rage is consumpted
At the same time, Ipad connect only at
24.0 Mbit/s, MCS 0, 20MHz
104.0 Mbit/s, MCS 13, 20MHz
And Iphone 5 - even worse - at
24.0 Mbit/s, MCS 0, 20MHz
52.0 Mbit/s, MCS 5, 20MHz
I looked a lot of discussions but I can not figure out what to do, to make my Iphone work fgaster than 65Mbits and Ipads - faster than 130Mbits... It is a maximum in my conditions and I dunno what to fix...

Hi deemona,
Everything appears to be normal on your wireless network. It all comes down to what WiFi standards each device supports. On 2.4GHz the iPhone 5 only supports a max of 72Mpbs (20MHz, 1 stream). The new iPad (mini/Air) supports a max of 150Mbps (20Mhz, 2 streams).
On 5GHz things change slightly where both the iPhone 5 and new iPads support 40Mhz channel bonding allowing each to support higher speeds, the iPhone 5 150Mbps and new iPads 300Mbps.
Hope this helps!
Brice

Non-overlapping channels - 802.11a/n - need clarification

There seems to conflicting or inconclusive information the topics below. I have just been readying various docs using google searches. I am hoping to get some solid answers.
1) What channels for 802.11a are really non-overlapping? 8 or 12? I have read in some sources that it is 12 but the last 4 are for outdoor use(?).
2) in regards to 802.11a, channels 149 - 165 are considered for outdoor use so indoor availability is only 8 channels, correct?
3) What would be the non-overlapping channels for 802.11n? Indoor use only.
4) What happens when an 802.11n/a device and a traditional 802.11a device connect to the same network?
Thank you,

Hi Jacob,
Following diagram should helps you (Ref source )
Referencing this & if you look at your 4 queries you can find the proper answer. Here is my response
1) What channels for 802.11a are really non-overlapping? 8 or 12? I have read in some sources that it is 12 but the last 4 are for outdoor use(?).
As you can see, excluding UNII-2 extended there are 12 non overlapping channels (13 including CH165), depends on the different country regulations you can use those for indoor/outdoor deployments.
2) in regards to 802.11a, channels 149 - 165 are considered for outdoor use so indoor availability is only 8 channels, correct?
It depend on the courntry regulation. I think in US you can use that band(UNII-3) for both indoor/outdoor deployments. So in that case 12 CH availabel excluding UNII-2 extend band.
3) What would be the non-overlapping channels for 802.11n? Indoor use only.
802.11n in this band, you can aggregate two 20MHz channel, (effective 40MHz bandwidth). You can see 6 non-overlapping channels available with 40MHz width in those bands (80MHz & 160MHz option shown in the above diagram applicable to 802.11ac standard)
4) What happens when an 802.11n/a device and a traditional 802.11a device connect to the same network
802.11n device will communicate with 40MHz (if configured on you wireless network & client support channel bonding) & normal 802.11a client will connect using 20MHz channel without any CH bonding or aggregation
If that answers to your query pls mark this thread as "Answered"
HTH
Rasika
**** Pls rate all useful responses ****

GUIDE: Oracle VM VirtualBox and Oracle Linux NIC bonding

Author: Dude
Date: 01-Jun-2013
Version: B
Last updates:
23-Jul-2013, changes required due to forum upgrade
The following is provided in the hope that it might be useful. If you wish to use it for the purpose of reference, presentation or education, please include the link or information to this forum posting. Thank you!
What is Linux network interface bonding? Simply put, the Linux system provides a kernel driver, which can create a logical network device (bond) using 2 or more Network Interface Controllers (NIC) to accomplish link-aggregation and adapter fault-tolerance. For more information, please see the Deployment Guide at https://linux.oracle.com/documentation/
The channel bonding interface supports several modes of operation. In a typical active-backup set up for fault-tolerance, the system performs MII-based health monitoring of the network interface slaves (eth0, eth1) and assigns them according to bond options and interface availability. In active-backup mode (mode 1), only the current active network device is seen externally.
Linux bonding for fault-tolerance under Oracle VM VirtualBox does not seem to function as advertised. Searching the Internet for more information shows that other people have tried to set up Linux bonding using various virtualization products, virtual host network adapter and bonding options, but without success.
It appears the management of Media Access Control addresses (MAC) interferes with internal routing methods between the host and the virtual machine guest. Using the modinfo bonding command (fig. 1) shows a listing of available parameters for the bonding kernel module. The fail_over_mac parameter addresses the Mac address issue in VirtualBox.
Fig.1
# modinfo bonding
filename:       /lib/modules/2.6.39-400.17.1.el6uek.x86_64
                /kernel/drivers/net/bonding/bonding.ko
parm:           fail_over_mac:For active-backup,
                do not set all slaves to the same MAC;
                0 for none (default), 1 for active, 2 for follow (charp)
Configuration Example
Virtualization Product: Oracle VM VirtualBox 4.2.10
VM Guest OS: Oracle Linux 6.4 (x64)
VM adapter settings: Bridged Adapter, Paravirtualized Network (virtio-net)
Adapter1 (eth0): 080027436617, en0, Ethernet 1
Adapter2 (eth1): 08002708F36A, en0, Ethernet 1
Note: If you wish to reset the network adapter names and MAC addresses used by the Oracle Linux guest system, erase the content of /etc/udev/rules.d/70-persistent-net.rules and restart the virtual machine.
1. Create or modify the following configuration files:
/etc/modprobe.d/bonding-eth0_eth1.conf
alias bond0 bonding
/etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
IPADDR=10.0.2.12
NETMASK=255.0.0.0
GATEWAY=10.0.0.138
DNS1=10.0.0.138
DNS2=8.8.8.8
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
BONDING_OPTS="mode=1 miimon=100 fail_over_mac=1"
/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no
/etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no
2. Restart the system or network services (root):
Fig. 2
# service network restart
Configuration Test
Enter the following commands as user root to verify proper operation of NIC bonding:
Fig. 3
# tail /var/log/messages
bond0: setting mode to active-backup (1).
bond0: Setting MII monitoring interval to 100.
bond0: Setting fail_over_mac to active (1).
bond0: Adding slave eth0.
bond0: making interface eth0 the new active one.
bond0: first active interface up!
bond0: enslaving eth0 as an active interface with an up link.
bond0: Adding slave eth1.
bond0: enslaving eth1 as a backup interface with an up link.
Fig. 4
# ifconfig
bond0     Link encap:Ethernet HWaddr 08:00:27:43:66:17
          inet addr:10.0.2.12 Bcast:10.255.255.255 Mask:255.0.0.0
          inet6 addr: fe80::a00:27ff:fe43:6617/64 Scope:Link
          UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
eth0      Link encap:Ethernet HWaddr 08:00:27:43:66:17
          UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
eth1      Link encap:Ethernet HWaddr 08:00:27:08:F3:6A
          UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
Fig. 5
# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window irtt Iface
0.0.0.0         10.0.0.138      0.0.0.0         UG        0 0          0 bond0
10.0.0.0        0.0.0.0         255.0.0.0       U         0 0          0 bond0
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 bond0
Fig. 6
# ifconfig eth0 down
# tail /var/log/messages
bond0: link status definitely down for interface eth0, disabling it
bond0: making interface eth1 the new active one.
# ifconfig
bond0     Link encap:Ethernet HWaddr 08:00:27:08:F3:6A
          inet addr:10.0.2.12 Bcast:10.255.255.255 Mask:255.0.0.0
          inet6 addr: fe80::a00:27ff:fe43:6617/64 Scope:Link
          UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
eth1      Link encap:Ethernet HWaddr 08:00:27:08:F3:6A
          UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
Fig. 7
# ifconfig eth0 up
# ifconfig eth1 down
# tail /var/log/messages
bond0: link status definitely up for interface eth0, 4294967295 Mbps full duplex.
bond0: link status definitely down for interface eth1, disabling it
bond0: making interface eth0 the new active one.
# ifconfig
bond0     Link encap:Ethernet HWaddr 08:00:27:43:66:17
          inet addr:10.0.2.12 Bcast:10.255.255.255 Mask:255.0.0.0
          inet6 addr: fe80::a00:27ff:fe43:6617/64 Scope:Link
          UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
eth0      Link encap:Ethernet HWaddr 08:00:27:43:66:17
          UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
During the above test, the client network connection from host 10.0.0.1 (ssh) was maintained without any noticeable interruption. As it can be seen from the syslog and ifconfig command output, the bond0 interface was automatically assigned either the MAC address of eth0 or eth1 and the fail-over worked as advertised.
Good luck!

Please see these docs/links.
Using Oracle VM with Oracle E-Business Suite Release 11i or Release 12 [ID 465915.1]
Certified Software on Oracle VM [ID 464754.1]
Oracle VM Templates -- Oracle E-Business Suite 12.1.3 (32-bit), Oracle E-Business Suite 12.1.1 (64-bit and 32-bit) and Oracle E-Business Suite Release 12.X Sparse Middle Tier (32-bit)
http://www.oracle.com/technetwork/server-storage/vm/ebs-093153.html
E-Business Suite 12.1.3 Templates for Oracle VM Now Available
http://blogs.oracle.com/stevenChan/2010/11/ebs1213_oraclevm.html
Live Migration of EBS Services Using Oracle VM
http://blogs.oracle.com/stevenChan/2010/01/ebs_live_migration_ovm.html
Using Oracle VM with Oracle E-Business Suite Virtualization Kit
http://blogs.oracle.com/stevenChan/2009/12/oracle_vm_ebs_virtualization_kit.html
New Oracle® VM Templates for Oracle Applications Now Available
http://www.oracle.com/us/corporate/press/068341
Very Cool! New Oracle VM Templates for Oracle E-Business Suite
http://blogs.oracle.com/virtualization/2010/11/very_cool_new_oracle_vm_templa.html
Thanks,
Hussein

Channel bonding

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