Adtran 4200659L4 Manual Do Utilizador
Chapter 7. Circuit and Network Redundancy
7-4
MX2800 STS-1 User Manual
61200659L1-1
Table 7-1. Configuration Requirements for Circuit Recovery
CIRCUIT AND NETWORK FAILURE RECOVERY MODE
In this mode, two controller cards are installed and connected to
two individual STS-1 lines. This is, of course, the most complete
mode of redundancy. In this mode, the primary controller card is
connected to the primary STS-1 line and the secondary controller
card is connected to the secondary STS-1 line. The primary card
and line actively transmit data, while the other card and line stand
by ready to take over if the first card and line fail. For example, if
two individual STS-1 lines. This is, of course, the most complete
mode of redundancy. In this mode, the primary controller card is
connected to the primary STS-1 line and the secondary controller
card is connected to the secondary STS-1 line. The primary card
and line actively transmit data, while the other card and line stand
by ready to take over if the first card and line fail. For example, if
C
ARD
A
fails, then control switches to
C
ARD
B
and
NET B
.
An important feature of the MX2800 STS-1 is its ability to
internally re-route the network connection if a controller card and
the opposite network connection fail. For example, in the
illustration given in Figure 7-3, failed
internally re-route the network connection if a controller card and
the opposite network connection fail. For example, in the
illustration given in Figure 7-3, failed
NET A
is connected to
healthy
C
ARD
A
; and healthy
NET B
is connected to failed
C
ARD
B
.
Selection Path
Recommended Setting
Config > Network Interface > XCV Threshold
1E-3 (see the following note)
Config > Network Interface > Network Protection
Disabled
Config > Network Interface > Max. Switch Threshold
3
Config > Network Interface > Min. Switching Period
10 seconds
Config > T1/E1 Interface > T1/E1 Circuit Protection
Enable all or select the
T1/E1s that redundant
switching should occur on.
T1/E1s that redundant
switching should occur on.
Config > T1/E1 Interface > XCV Threshold
1E-3 (see the following note)
The XCV Threshold settings are based on the error rates
considered acceptable on the STS-1 or DS-1 before switching.
considered acceptable on the STS-1 or DS-1 before switching.