362 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Virtual Switch Redundancy Protocol (VSRP)
10
When you configure a track port, you assign a priority value to the port. If the port goes down, VSRP
subtracts the track port priority value from the configured VSRP priority. For example, if the you
configure a track port with priority 20 and the configured VSRP priority is 100, the software
subtracts 20 from 100 if the track port goes down, resulting in a VSRP priority of 80. The new
priority value is used when calculating the VSRP priority. Figure 72 shows an example.
FIGURE 72 Track port priority
In Figure 72, the track port is up. SInce the port is up, the track priority does not affect the VSRP
priority calculation. If the track port goes down, the track priority does affect VSRP priority
calculation, as shown in Figure 73.
VSRP
Master
VSRP
Backup
optional link
VSRP
Aware
VSRP
Aware
VSRP
Aware
F
F
F
B
B
B
Configured priority = 100
Track priority 20
Actual priority = (100 - 0) * (3/3) = 100
Configured priority = 100
Actual priority = 100 * (3/3) = 100
Track port
is up
