Failover Policy And Failback Policy; Brocade 4Gb San Switch For Hp C-Class Bladesystem In Access Gateway Mode - HP StorageWorks 4000/6000/8000 - Enterprise Virtual Arrays Reference Manual

N_Port (host)
Server Bay 1
Server Bay 2
Server Bay 3
Server Bay 4
Server Bay 5
Server Bay 6
Server Bay 7
Server Bay 8
Server Bay 9
Server Bay 10
Server Bay 11
Server Bay 12
Server Bay 13
Server Bay 14
Server Bay 15
Server Bay 16
Blade enclosure
with 16 servers
Figure 49 Brocade 4Gb SAN Switch for HP c-Class BladeSystem in Access Gateway mode
.
NOTE:
The uplink ports (N_Ports) in

Failover policy and failback policy

AG mode supports the failover and failback policies (enabled by default), which you can configure
on a per-port basis.
The failover policy enables automatic remapping of hosts to other online N_Ports, if N_Ports go offline.
It evenly distributes hosts among the available N_Ports. This policy ensures a smooth transition with
minimal traffic disruption when a link fails between an N_Port on the AG and an F_Port on the external
fabric.
The failback policy automatically routes hosts back to the original N_Ports when they come online.
NOTE:
When a failover or failback occurs, hosts must be logged back in to resume I/O.
190 Heterogeneous server rules
c-Class BladeSystem Access Gateway
F_Port (virtual)
c-Class BladeSystem
Access Gateway
Default server to
uplink mapping (2:1)
Server Uplink
1,2 1
9,10 2
3,4 3
11,12 4
5,6 5
13,14 6
7,8 7
15,16 8
Figure 49 are from the AG, not the hosts.
Uplink 1
F_Port (NPIV)
N_Port (NPIV)
Uplink 2
F_Port (NPIV)
N_Port (NPIV)
Uplink 3
F_Port (NPIV)
N_Port (NPIV)
Uplink 4
F_Port (NPIV)
N_Port (NPIV)
Uplink 5
F_Port (NPIV)
N_Port (NPIV)
Uplink 6
F_Port (NPIV)
N_Port (NPIV)
Uplink 7
F_Port (NPIV)
N_Port (NPIV)
Uplink 8
F_Port (NPIV)
N_Port (NPIV)
FC switch with
NPIV support
25318a