Point to Point radio link

I 'm using Labview to simulate a Point to Point radio link I would like to
save myself the effort of creating PSK and QAM modulators since i'm already
very busy in modeling the fading channel
Has anyone already done this and, if so, would they be willing to share
their files?
Thanks
Horackz

POOR (121% retries) Time   Strength(dBm)   SNR      SNR          Retries
                     msec      In     Out    In      Out         In   Out
      Sent : 100, Avg 30    - 78    - 88    11        4   Tot: 103   140
Lost to Tgt:   0, Max 993    - 78    - 85    12      138   Max: 20    27
Lost to Src:   0, Min   2    - 80    -254    10        3

Similar Messages

Point to Multipoint Bridge Link

I am currently working on a wireless solution at a campus that has a main building (Bldg A) and two remote buildings (Bldg B & Bldg C). The two remote buildings each have a 1232 access point that provides wireless access to the Internet via Linksys ADSL routers. At Site A there are 5 x 1232 access points providing wireless access to the LAN.
At each remote site the client wishes to discontinue the ADSL service and connect the access points to the main network at Bldg A. Bldg B is 80 metres from Bldg A and Bldg C is 30 metres from Bldg A. Bldg B & C are both in a 30deg beamwidth of the antenna at Site A. There is no Ethernet cabling connecting the sites so a bridge link will be required. The client requires a voice grade WLAN.
I am proposing the following solution
- BR1310 bridge with integrated antenna at Bldg A (root bridge) or a directional antenna such as a yagi or sector antenna.
- BR1310 bridge with Omni-directional antenna mounted on the roof of Bldg B (non-root bridge) associating to the root bridge at Bldg A
- Existing 1232 AP with 2.2dBi dipole antenna at Bldg C (non-root with clients) associating to the root bridge at Bldg A and providing wireless access to clients.
Can anyone advise if I can connect the Ethernet port of 1232 AP at Bldg B to the Ethernet port of the BR1310 (non-root bridge) to provide wireless access to clients via the 1232 AP. My reason for wanting to use the 1232AP is that I am not confident that the Omni-directional antenna will provide adequate signal penetration through the corrugated roofing steel.
Originally I wanted to use 1232AP?s with the ?A radios? providing bridge links and the ?G radios? providing wireless client access but from what I have understand the AP1232 can only be used in point to point configurations.
Thanks for your help.

I was going to have the same concern as you about using the 1232 for both bridging and client serving. Tying a bridge and an AP back to back is a valid configuration from what I have heard. I haven't had the opportunity to try it, though. I know that Cisco says tying 2 bridges back to back to serve as an intermediate bridge hop is a valid configuration, so I don't see why this would be any different.

IPv6 Addressing Point to Point Links in the enterprise

For an enterprise, it doesn't seem to make sense to use Global addressing for point to point, transit-only links and loopbacks.
Link-local only addressing breaks debugging tools like traceroute, DNS, etc.
Is Unique Local the correct choice for this?
I've searched quite a bit and I've not found a lot of discussion about scope selection for point to point links. Some RFCs such as 6164 imply Global scope vs Unique Local scope usage is a preference. Most discussions of point to point addressing focus on bit length. I'm assuming this means design concerns are agnostic toward scope selection.
Is anyone aware of documentation I've missed or have any recommendations in this area?
If ULA was the correct choice, address hierarchy might look like this:
DataNetwork1 -- Router1 -- ULA.1.1 -- Link -- ULA1.2 -- Agg Router -- Core
DataNetwork2 -- Router2 -- ULA.2.1 -- Link -- ULA2.2 -- Agg Router /
DataNetwork3 -- Router3 -- ULA.3.1 -- Link -- ULA3.2 -- Agg Router /
The network core would have summarized entries for DataNetwork[1|2|3] and ULA[1|2|3]. IE, there would be a Global hierarchy and a ULA hierarchy.

Scott,
Let me break this down into some categories for you.
Address selection:
I believe that best practice is to use Global Unicast Addressing everywhere (coupled with a proper security policy at your edge). ULA was a compromise for Site Local never being properly defined and whilst it can be used in the same way as GUA I don't believe it is worth it. Irrespective of what you use (GUA or ULA), subject to your security and routing policy traceroute will work from both ends (e.g. you tracing out, someone tracing in)
Address masking:
The general rule of thumb is that you allocate /64s to eveything and then mask down to the appropriate mask for the function you are expecting (P.S. Forget everything you learnt about IPv4 address conservation). If you are using /127 masks then in theory every p2p link in your network is either a 0 (::) or a 1 (::1)
e.g.
traceroute HostB:
1     2001:1234:abcd:1::1
2     2001:1234:abcd:2::1
3     2001:1234:abcd:3::1
4     2001::4:10
The only exception to this is loopbacks, you can sequentially allocate /128s from the same /64 block
NOTE: /127 support is recent and may not be supported by some vendors, in this case use /126 masking (same as you would use /30s in IPv4)
If you have a /48 ( a normal enterise allocation) or larger then this should not be an issue ( you have access to 65536 x /64s) the only reason you would consider ULA for infrastructure numbering is because you have a small IPv6 pool. I would still argue you should get more IPv6 addresses than use ULA.
I hope this helps
Cheers

Create a tab that points to an external link ?

Hi,
Oracle 11g r2.
Apex 4.1.1.00.23.
I need to create a tab that points to an external link (actually a link to our old Forms application).
For the moment, I simply added the tab "manually" in the template by writing the needed HTML after the #TAB_CELLS# substitution string.
It works but it does not allow me to control authorization scheme, etc.
Is there any way I can create a tab without associating it to an existing page, but pointing to an external link ?
Thank you.
Yann.

Hi,
Create page zero to your app if you do not have one.
Create tab that lead to page zero.
Edit tab and check what is tab name.
Tab name (not label) is important as it is reguest when you press tab.
Create application process On Submit: After Page Submission - Before Computations and Validations like
apex_util.redirect_url('http://www.google.com');Set condition to process Request = Expression 1 and enter to Expression 1 your tab name (not label)
Regards,
Jari
My Blog: http://dbswh.webhop.net/htmldb/f?p=BLOG:HOME:0
Twitter: http://www.twitter.com/jariolai

Rx load 100/255 observing packet drops on a point to point link

Hi, I have point to point link, if rxload goes above 40%, packets are getting dropped on a link. checked with ISP for mux issue but there is no problem from isp side. please suggest

Please post the configs and sh int output.

Create a point to point link with a wlc 4402

Hi to all,
i have a wlc 4402 and i need to configure a point to point link with two air-lap1310g-e-k9, i have found on cisco.com this link:
http://www.cisco.com/en/US/products/ps6366/products_configuration_example09186a00808e9c1b.shtml#zero
but on the wlc configuration page i cannot found some configuration step.
Someone have configured this type of behaviour or can give me some hints?!
How can i configure on the wlc the parameter about the bridges configuration?! Or i must configure the bridges overriding the global configuration?!
Thanks and best regards,
Carlo Sagratella.

The correct thing to do would be to downgrade the 1310's to autonomous (or 1242's) and set up a root bridge and non-root bridge.
Alternately however, if you REALLY wanted one of the points to be LWAPP, in theory you could always make one of the Access Points Autonomous and join it as a workgroup bridge to the LWAPP AP. However, there really is no reason to do that since it would be cleaner to convert both to autonomous.

HP Pavilion a1210n with Windows Vista 32bit. looking for audio drivers. Can you point me to a link?

Hello,
I have an HP Pavilion a1210n running Windows Vista 32bit. I'm missing the audio drivers and can't seem to find them. Can you point me to a link for these drivers?
Thanks, It's much appricieated!

I found this link but it doesn't talk about audio drivers in the multimedia package. Am I missing something? Does Vista need to have all OS updates installed for this to work?
Thanks again!

Link Redundancy Mpls primary on ethernet & point to point secoundary leaseline on serial

hi i am having one link mpls with internet (primary) (e0/0)-10.1.1.1 and secound link point to point serial (s0/0) i want to do redundancy between two links
but problem is mpls link never shows down . so if mpls fails then my point to point should be up please Find Attach file.
can i get confuration according to my e.g. drawing
as per my knowledge ip sla track command is thier but i dont know exact command.

Hi,
You are right...You should use IP SLA to track the primary link (ISP side IP)....
Try these...
track 125 ip sla 10 reachability
delay down 15 up 10
ip sla 10
icmp-echo 4.2.2.2 (change this with the exact IP) source-interface Dialer1
threshold 40
If it doesn't work, just tewak some parameters..Some the methodilogy remain same..
Good Luck !!!!

Bandwidth mismatch in Point-to-Point link

In point-to-point serial link connection, if the bandwidth setting on both sides are not the same, will the connection status is up and running? What will the bandwidth be? The lower one?

As I indicated earlier, the bandwidth configured at the interface level is only used for IGP metrics etc. If set to be different at either end, it will not affect the physical state of the interface. It will stay up.
However, it's better to make them the same.
PAresh

IPv6 link-local address on point-to-point interface

Hello,
I'm a little bit confused. I know that there are two ways of assigning an IPv6 link-local address on interface. We can add it manually, or it is by default created automatically using modified EUI-64. But how is this address made when there is no MAC address on point-to-point link?
Thanks.
Martin

Hello,
sorry but I don't think that these reasons are reasonable. Why do they need to remember these addresses when are they used only on a link with internal processes? They cannot be used for management purposes, so I would say that it is easier for me to configure one loopback with global address at each router which would be easy to remember, announce it to IGP and it can be used for management, so as for BGP..and I don't need to care about all link local addresses I'm using in my network, which might contain hundreds of links..

How to Bundle Muliple Dark Fiber point to point links

Hi There
We have 2 data centers and are currently in the process of designing OTV between them leveraging 2 x 1GB point to point Dark Fibre links.
In DC1 the 2 connections will terminate in a Nexus VDC (VPC enabled)Cluster
In DC2 the 2 connections will termination in a 6500 HSRP cluster (1 is a 6509 and 1 is a 6513)
Will it be possible for me to use an etherchannel type setup here to get the most out of both of the connections?
Thanks

Thanks for your reply.
Can you throw some ideas at me in which I could make this work?
what if I was to terminate the connections on a 3560 in front of the 6500 switches in DC2?
In DC1 they would be terminated in a VPC domain so on that side it should be OK?

Creating multiple point to point connection

Consider me mostly a newbie. I have a router that's connected to a WiFi radio system. The radio is, for all intent and purposes, transparent to the network.
Point is now, I want to connect via the same WiFi radio system to 4 other routers (each other router has the same radio system) on a point to point basis.
All five routers have static IPs.
The need is to create 4 static point-to-point link, over 1 single interface on the router that's connected to the radio system.
Can this be done? Is so, how? Help please?

First of all, I do not really see the advantage of configuring this as point-point. Appearently you want to make all traffic flow over the central router? The radio is actually a point-to-multipoint medium by nature. This means that the bandwidth on the link will be shared, no matter what you configure.
You could "enforce" point-point behaviour by means of static routing. On all spoke-routers you configure a single static route 0.0.0.0 with the hub router as the next hop.
On the the central router you can then put statics to the respective destinations. Very important is to use the interface command "no ip redirects"
This prevents icmp redirects being sent which would cause non-point-to-point behaviour. This implies that you have used the same ip subnet for all routers. This is what I would configure for this case.
Alternatively, you may use different subnets per router and apply secondary IP's on the hub.
Regards,
Leo

Bridge Point to Point with AP 1552EU - Maximun Data Rate

Hi all, I have a question for you, and I need your help.!!!
I have two site (Central and Remote) and I did a link point to point between it. These AP are managed by a WLC 5508, the distance between this AP is 30 Mts or 98 feed, I have configured the channel width in 40Mhz in the WLC, and MCS-5 in the data rate sección of Bridge AP. I did tests flooding the link and I only can transfer 40Mbps in both directions at the same time. This ap model is 802.11n capable. So how can I increase the data rate from 40Mbps to 100 o more Mbps.?
The antennas are directional with two ports (TX/RX) and are connected in the ports 1 and 3 of AP.
I hope your response.
Thanks,

Wow. You're radios are only 100 feet apart and you have 14dBi directional panels hooked up to them? Hopefully the TX power is configured properly and is turned *way* down.
You should certainly be able to get 802.11n HT rates between two 1550s with these antennas and 2 spatial streams. You *should* be able to achieve HT MCS 15 at 40MHz with a PHY data rate of 300 Mbps. Actual Layer 3 throughput would be approaching 100Mbps, but I think you are more likely to see ~80Mbps in actuality.
Best of luck!

The radio link keeps dropping

Hi,
We have a pair of AP1242 setup as point to point. It was working for ages then suddenly the radio link keeps dropping .There was no changes in the configurations and as well on the hardware and the way it setup.The signal strength values on both AP is good but one thing i have notice is on the other AP, the SNR values goes very low 3dB then it will go high more than 100,we replaced the AP and cable connected to the antenna but we are still having the same issue.I am thinking that there might be some issue on the antenna or some interference going on that have cause this issue. is it normal for SNR value to change it value to very low and then high?
Thanks.

5+ D Man ...
I agree . Also you can do a carrier busy test which could help identify interference ... Here you can read more about that on my blog ...
http://www.my80211.com/cisco-auton-cli-commands/2010/6/20/autonomous-carrier-busy-test.html

Can I use my Time Capsule with a point to point antenna?

We have a building about 400 feet away that I would like to install wireless cameras. Can I use a point to point antenna with our time capsule or is there a better option?

The Time Capsule is too hard to get into. You can do this but the end result will be rather messy and for an expensive unit like the TC that is a waste.
Get a unit made for this job.. you only need a WAP..
eg http://www.tp-link.com/en/products/details/?model=TL-WA5210G

Point to Point radio link

Similar Messages

Maybe you are looking for