BelAir20E User Guide
Mobile Backhaul Mesh
April 2, 2012
Confidential
Document Number BDTM02201-A01 Standard
When the mobile subscriber station determines that a listening link has a better
link quality than the current forwarding link, it changes the link state so that the
listening link with the higher quality becomes forwarding.
These
look ahead
and
make before break
handover schemes allow the
BelAir20E with mobile backhaul mesh links to provide uninterrupted support
for a wide variety of applications, including voice and video.
Each base station node can support up to eight links. These can be mobile links
or links to other stationary base stations. Mobile links can be either forwarding
or listening. If a mobile subscriber station arrives within range of the base
station, its forwarding link has precedence over the listening links of the other
mobile subscriber stations.
Configuring
Mobile Backhaul
Mesh Links
The following tasks can be done:
•
“Displaying Mobility Configuration and Status” on page 124
•
“Configuring MIMO Operation for Mobile Applications” on page 125
•
“Configuring and Enabling Mobile Backhaul Mesh Links” on page 125
Displaying Mobility
Configuration and
Status
/interface/wifi-<n>-<m>/show backhaul mobility-path-select-history
This command displays the history of a radio’s mobile path switches for
debugging purposes. The displayed information includes an event ID, local RSSI,
peer RSSI, failure rate, age time, mobile credit score, peer MAC, peer IP
address, and the peer system name. Each radio stores up to 500 entries. The
data is not persistent.
Example
/# interface/wifi-1-1/show backhaul mobility-path-select-history
1 1970-01-01 10:46:30 new [-64 -58 0 0 -64 00:0d:67:09:7d:fa 10.1.1.110 BA100T_110]
2 1970-01-01 11:54:44 chg [-57 -63 0 0 -63 00:0d:67:0c:6e:f4 10.1.1.120 BA100tt_120]
3 1970-01-01 12:01:14 chg [-54 -57 0 0 -57 00:0d:67:09:7d:fa 10.1.1.110 BA100T_110]
4 1970-01-01 12:22:30 chg [-55 -63 0 0 -63 00:0d:67:0c:6e:f4 10.1.1.120 BA100tt_120]
5 1970-01-01 12:33:13 chg [-53 -53 0 0 -53 00:0d:67:09:7d:fa 10.1.1.110 BA100T_110]
Additional Configuration Display Commands
Refer to the following sections and command descriptions:
•
“Displaying Backhaul Link Configuration” on page 115
•
“Displaying the Mesh Topology” on page 118
•
show rf-survey backhaul
, described in the
BelAir20E Troubleshooting
Guide