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380 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Virtual Switch Redundancy Protocol (VSRP)
10
The "Restart ports:" line lists the ports that have the VSRP fast start enabled, and the downtime for
each port. Refer to Table 64 on page 377 to interpret the remaining information on the display.
VSRP and MRP signaling
A device may connect to an MRP ring through VSRP to provide a redundant path between the
device and the MRP ring. VSRP and MRP signaling ensures rapid failover by flushing MAC
addresses appropriately. The host on the MRP ring learns the MAC addresses of all devices on the
MRP ring and VSRP link. From these MAC addresses, the host creates a MAC database (table),
which is used to establish a data path from the host to a VSRP-linked device. Figure 74 below
shows two possible data paths from the host to Device 1.
FIGURE 74 Two data paths from host on an MRP ring to a VSRP-linked device
If a VSRP failover from master to backup occurs, VSRP needs to inform MRP of the topology
change; otherwise, data from the host continues along the obsolete learned path and never reach
the VSRP-linked device, as shown in Figure 75.
PowerConnect#show vsrp vrid 100
VLAN 100
auth-type no authentication
VRID 100
========
State Administrative-status Advertise-backup Preempt-mode save-current
master enabled disabled true false
Parameter Configured Current Unit/Formula
priority 100 50 (100-0)*(2.0/4.0)
hello-interval 1 1 sec/1
dead-interval 3 3 sec/1
hold-interval 3 3 sec/1
initial-ttl 2 2 hops
next hello sent in 00:00:00.3
Member ports: ethe 2/5 to 2/8
Operational ports: ethe 2/5 ethe 2/8
Forwarding ports: ethe 2/5 ethe 2/8
Restart ports: 2/5(1) 2/6(1) 2/7(1) 2/8(1)
Path 1
Path 2
MRP
Member
MRP
Master
MRP
Member
MRP
Member
MRP
VSRP Master
VSRP
Host
VSRP Backup
MRP
Member
MRP
Member
MRP
VSRP Master
VSRP
VSRP Backup
Device 1
Device 1
Host
MRP
Member
MRP
Member
MRP
Master
MRP
Member