cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
14011
Views
65
Helpful
62
Replies

ASK THE EXPERTS - WI-FI NETWORKS

ciscomoderator
Community Manager
Community Manager

Welcome to the Cisco Networking Professionals Ask the Expert conversation. This is an opportunity to get an update on different aspects of wireless network design and installation with Fred Niehaus.  Fred is a Technical Marketing Engineer for the Wireless Networking Business Unit at Cisco, where he is responsible for developing and marketing enterprise wireless solutions using Cisco Aironet and Airespace wireless LAN products. In addition to his participation in major deployments, Niehaus has served as technical editor for several Cisco Press books including the "Cisco 802.11 Wireless Networking Reference Guide" and "The Business Case for Enterprise-Class Wireless LANs." Prior to joining Cisco with the acquisition of Aironet, Niehaus was a support engineer for Telxon Corporation, supporting some of the very first wireless implementations for major corporate customers. Fred has been in the data communications and networking industry for more than 20 years and holds a Radio Amateur (Ham) License "N8CPI."

Remember to use the rating system to let Fred know if you have received an adequate response.

Fred might not be able to answer each question due to the volume expected during this event. Our moderators will post many of the unanswered questions in other discussion forums shortly after the event. This event lasts through July 16, 2010. Visit this forum often to view responses to your questions and the questions of other community members.

62 Replies 62

cthrasher
Level 1
Level 1

Hello,

I have 2 Wism blades that I want to setup as redundant or failover for each other. I am using WCS and my 2 wism blades are on 2 different 6500 switches. My 6500's are connected via fiber at layer 2. I have a couple of wlans' setup on my primary controller and I am using dynamic interfaces to map the vlan supporting the wlan. If my primary controller fails, I understand I use templates on the WCS to apply secondary and tertiary controllers to the connected AP's. What happens to my session as a client if my primary controller fails, and I then begin to look for secondary controller and the secondary controller has a different IP address for vlan 300? Will a mobility group keep me connected or will my session fail and re-connect after finding the secondary controller? What are best practices for setting up what I want to achieve? Thank you!

Cat

IF your WLAN setup isn't that complicated (no 802.1x, for example), I'd recommend you look into H-REAP.  During a failover with H-REAP, the LWAPs don't loose sessions and it's "business as usual".

I am using HREAP for my field sites, but these controllers are supporting my local campus.  Are you suggesting I use HREAP for my local campus?

Sure, why not.

The mobility group will not keep you connected, as it is not completely seamless, there will be a very short client disconnection during this process.

See the design guide at the following URL http://www.cisco.ws/en/US/docs/wireless/technology/controller/deployment/guide/dep.html

Fred

shakeerali
Level 1
Level 1

Hi,

I want a Switch/Router to tranfer data from ATM (Automated Teller Machine) at one side using GPRS as medium and have a Router at the other end with VPN connectivity. Could you suggest me the Cisco part numbers for the Switch/Router with GRPS Modem and Router with VPN connectivity. And also I want to know what IP address will be used at the Switch/Router (ATM side) i.e is it a public IP address or private IP address ? and is it possible to use Cisco 880 Wireless Router at the ATM Machine side in my design ?

Thanks.

Mohammed Ali

Could you suggest me the Cisco part numbers for the Switch/Router with GRPS Modem and Router with VPN connectivity.

How many VPN tunnels do you have in mind?

The 880G series router has 3G capability and supports up to 20 VPN tunnels.

Cisco 880G Series 3G Wireless Integrated Services Router

http://www.cisco.com/en/US/prod/collateral/routers/ps380/ps10082/data_sheet_c78_498096.html

3G Features for Cisco 880 Series Integrated Services Routers

http://www.cisco.com/en/US/prod/collateral/routers/ps380/ps10082/qa_c67_498352.html

Don't forget to rate useful posts.  Thanks.

Sir, how do we get the info about the number of VPN tunnels supported by a router. I can't find it in documentation provided by cisco. I still need to contact Cisco regarding some infos.

Sir, how do we get the info about the number of VPN tunnels supported by a router.

Just want to let you know that this is not the correct forum topic to discuss this subject matter.  But here's the link to the documentation anyway.

http://www.cisco.com/web/partners/downloads/765/tools/quickreference/vpn_performance_eng.pdf

Don't forget to rate useful posts.  Thanks. 

You gave me a "3" for giving you the correct answer????  

amila.bperera
Level 1
Level 1

Hi there,


I am searching for wireless connectivity for two office premises which is 50m(line of sight) apart from each other, which should also support at least 30Mbps(this is impartive) traffic. Can I use 1300 series bridge  to accomplish my objective? Alternatively, anyone has a better suggestion other than 1300 series?

Please let  me know.

You sure you can't use fibre optic?

I'd be using a 1250 autonomous AP with directional dish antennae.  You can configure point-to-point bridge.

Wireless Bridges Point-to-Point Link Configuration Example

http://www.cisco.com/en/US/customer/tech/tk722/tk809/technologies_configuration_example09186a008058f53e.shtml

Don't forget to rate useful posts.  Thanks.

Hi Leo,

Thanks for you reply.Actually we selected wirless, as an alternative for fiber optic(its not cheap).Could you please tell me more about the antenna( directional dish) your using at the moment? Also gain of the antenna?

I cant access follwing link.Can you please attach it to me as a pdf or HTML format.

http://www.cisco.com/en/US/customer/tech/tk722/tk809/technologies_configuration_example09186a008058f53e.shtml

Many thanks,

Amila

Have a look at the following links:

Cisco Aironet 2.4 GHz and 5 GHz Antennas and Accessories
http://www.cisco.com/en/US/prod/collateral/wireless/ps7183/ps469/product_data_sheet09186a008022b11b.html

Cisco Aironet Antennas and Accessories Reference Guide
http://www.cisco.com/en/US/prod/collateral/wireless/ps7183/ps469/product_data_sheet09186a008008883b.html

For the distance mentioned, a yagi antennae would be suitable.  AIR-ANT2410Y-R (between one or two) for the 2.4Ghz radio (with diversity turned off) would be suitable.

Hope this helps.

Please don't forget to rate useful posts.  Thanks.

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: