Dell PowerConnect FCS624S Configuration Guide - Page 404

10 Virtual Switch Redundancy Protocol (VSRP) 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 Track port is up Configured priority = 100 Track priority 20 Actual priority = (100 - 0) * (3/3) = 100 Configured priority = 100 Actual priority = 100 * (3/3) = 100 VSRP Master optional link VSRP Backup FF F BBB VSRP Aware VSRP Aware VSRP Aware 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. 362 PowerConnect B-Series FCX Configuration Guide 53-1002266-01