virtual mac redundancy protocol (vmrp) ieee802.17 wg hyatt regency dallas, tx usa nov 12~17, 2006

Virtual MAC Redundancy Protocol (VMRP)

zhaisuping@huawei.comyanw@huawei.com

Bsultan@huawei.comIEEE802.17 WG

Hyatt Regency Dallas, TX USANov 12~17, 2006

• To reuse the VRRP (Virtual Router Redund

ancy Protocol) mechanism in the interconne

ction RPR network.

• The right figures shows the function views o

f the interconnection RPR bridges and the r

elationship between the RPR ports and ring

connections.

• When use VMRP, as show in the top right fi

gure, bridge C1 and C2 shares the two VMA

Cs, VMAC1 for the left RPR ring, VMAC2 fo

r the right RPR ring.

VMRP overview

RMACL2

RMAC

RMAC

RMAC

RMACL2

RMAC

RMAC

RMAC

C1-P1

C1-P2

C2-P3

C2-P4

C1-P4

C1-P3

C2-P2

C2-P1

VMAC1 VMAC2

R2

C1

C2

R3

R4

R1C1-P1

C1-P2

C1-P4

C1-P3C2-P2

C2-P1

C2-P3

C2-P4

We also can classify the traffic into different groups same with DIP. For different traffic groups, provisioning or dynamically negotiating the master bridge t

o forward the traffic. In the stable state, the master and backup bridge share the same SDB per ring throug

h the synchronization mechanism. In case of the master bridge fails, there is no need to update the other RPR bridges S

DB, because the master and backup bridges share the same virtual MAC address. There are two mechanisms to detect if the master bridge fails. One is if the backup bri

dge can’t receive the messages from master continuously for x times, then the backup bridge knows that the master bridge has failed. The other is the backup bridge can monitor the TP database periodically, as a result has the knowledge of the master bridge’s state information.

VMRP brief overview

• Any discussion?

About VMRP

Thank you!