Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 660)

High availability support
IP DHCP Relay address configurations are maintained when control is switched from the active to the
standby management module (MM) in the VDX 8770-4 and VDX 8770-8 chassis.
Two management modules (MMs) provide redundancy on the Brocade VDX 8770-4 and VDX 8770-8
chassis. These modules host the distributed Network OS that provides overall management for the
chassis. If the active module becomes unavailable, the standby module automatically takes over
management of the system and becomes the active MM. For more information, refer to
Configuring
high availability on page 85.
IP DHCP Relay address configurations are maintained on the new active MM and the MM will
continue to relay DHCP packets between DHCP clients and servers. IP DHCP Relay statistics will not
be maintained, however.
High availability support
660 Network OS Administrator’s Guide
53-1003225-04