Vsrp And Mrp Signaling - Dell PowerConnect B-FCXs Configuration Manual

10
Virtual Switch Redundancy Protocol (VSRP)
PowerConnect#show vsrp vrid 100
VLAN 100
auth-type no authentication
VRID 100
========
State
master
Parameter
priority
hello-interval
dead-interval
hold-interval
initial-ttl
next hello sent in 00:00:00.3
Member ports:
Operational ports: ethe 2/5 ethe 2/8
Forwarding ports:
Restart ports:
The "Restart ports:" line lists the ports that have the VSRP fast start enabled, and the downtime for
each port. Refer to

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.
shows two possible data paths from the host to Device 1.
FIGURE 74
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
380
Administrative-status Advertise-backup Preempt-mode save-current
enabled
Configured Current
100
1
3
3
2
ethe 2/5 to 2/8
ethe 2/5 ethe 2/8
2/5(1) 2/6(1) 2/7(1) 2/8(1)
Table 64 on page 377 to interpret the remaining information on the display.
Two data paths from host on an MRP ring to a VSRP-linked device
Path 1
MRP
Master
MRP
MRP
Member Member
MRP
MRP
VSRP Master
Member
VSRP Backup
Member
VSRP
Device 1
disabled
Unit/Formula
50 (100-0)*(2.0/4.0)
1 sec/1
3 sec/1
3 sec/1
2 hops
MRP
Host
Figure 75.
PowerConnect B-Series FCX Configuration Guide
true false
Figure 74
Path 2
MRP
Member
MRP MRP
Member
Member
MRP
MRP
VSRP Master
VSRP Backup
Master
Member
VSRP
Device 1
below
MRP
Host
53-1002266-01