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Mesh Networking

Thursday, February 13, 2014 7:49 AM
–        Self-assembling, Self-healing, highly-reliable algorithm
–        Point-to-multipoint networking topology
–        Automatic or Manual link priority configuration
–        Multi-mode operation:
•         Base Bridge mode
•         Client Bridge mode
•         Simultaneous MU support
–        802.11i AES-CCMP Encryption

 Mesh -  How it works

–        Each Mesh AP requires these config items:
•         Role in the Mesh (i.e. Base Bridge and/or Client Bridge)
•         Mesh WLAN Name
•         Mesh Encryption Key (i.e. WEP, TKIP or AES)
–        Each BB AP will accept up to 12 CBs
–        Each CB AP will establish up to 3 links (1 primary, 2 backup)
–        A CB AP can support a wired segment on the Eth port
–        Any AP can support MUs on Mesh or other WLAN

Mesh – Self-Assembling Algorithm

–CB scans for BBs with Mesh WLAN
–CB establishes primary and secondary links:
•RSSI @ Association time
•STP Priority (default is 32768, if equal then lowest MAC)
•Path Cost (Eth=19, RF>65dBm=32, RF<65dBm = 33 to 255)
–CB forwards traffic on primary link unless link fails (i.e. 10 Failed Tx or 100 Missed Beacons)
–CB constantly re-scans for new or better BBs links
Example:

Mesh – Manual Link Selection

Manual Config















Mesh – Single vs Dual Radio AP

–        A mesh with WLAN service to MUs can be implemented on a single-radio AP.
–        However, advantages of dual-radio AP:
•         802.11a radio dedicated to Mesh
•         802.11b/g radio dedicated to Clients
•         Most efficient use of bandwidth and channel utilization
–        Uplink data does not need to contend for channel used by MUs
–        Adjacent channels can use different channels

Mesh – Security
–        Access to the Mesh and Encryption of Mesh data is achieved via PSK methods (including 802.11i):
•         WEP 40-128 bit
•         KeyGuard
•         TKIP  WPA
•         AES-CCMP  WPA2-802.11i  (Recommended)
–        Security policy is created and applied to Mesh WLAN, like any other WLAN
 Mesh – Trunking
–        AP-7131 Mesh supports VLAN Tags
•         BB and CB LAN Ethernet Ports can be trunked:

 Mesh – Trunking Extreme
–        AP-7131 Mesh supports Dual Wireless VLAN Trunks…
•         Switch A ßà Switch C
•         Switch B ßà Switch D


AP7131 – Radio Config for Base Bridge


AP7131 MESH Check Status


AP7131 Mesh Status Detail


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