Dell PowerConnect 6248 Configuration Guide - Page 169

Table 9-3., Applications that Checkpoint Data, Application, Checkpointed Data - iscsi

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NOTE: The switch cannot guarantee that a backup unit has exactly the same data that the management unit has when it fails. For example, the management unit might fail before the checkpoint service gets data to the backup if an event occurs shortly before a failover. Table 9-3 lists the applications on the switch that checkpoint data and describes the type of data that is checkpointed. Table 9-3. Applications that Checkpoint Data Application ARP Auto VOIP Captive Portal DHCP server DHCP snooping DOT1Q DOT1S DOT1X DOT3ad IGMP/MLD Snooping IPv6 NDP iSCSI LLDP OSPFv2 OSPFv3 Route Table Manager SIM Voice VLAN Checkpointed Data Dynamic ARP entries Calls in progress Authenticated clients Address bindings (persistent) DHCP bindings database Internal VLAN assignments Spanning tree port roles, port states, root bridge, etc. Authenticated clients Port states Multicast groups, list of router ports, last query data for each VLAN Neighbor cache entries Connections List of interfaces with MED devices attached Neighbors and designated routers Neighbors and designated routers IPv4 and IPv6 dynamic routes The system's MAC addresses. System up time. IP address, network mask, default gateway on each management interface, DHCPv6 acquired IPv6 address. VoIP phones identified by CDP or DHCP (not LLDP) Utility 169

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Utility
169
NOTE:
The switch cannot guarantee that a backup unit has exactly the same data that the management unit has
when it fails. For example, the management unit might fail before the checkpoint service gets data to the backup if
an event occurs shortly before a failover.
Table 9-3 lists the applications on the switch that checkpoint data and describes the type of data that is
checkpointed.
Table 9-3.
Applications that Checkpoint Data
Application
Checkpointed Data
ARP
Dynamic ARP entries
Auto VOIP
Calls in progress
Captive Portal
Authenticated clients
DHCP server
Address bindings (persistent)
DHCP snooping
DHCP bindings database
DOT1Q
Internal VLAN assignments
DOT1S
Spanning tree port roles, port states, root bridge, etc.
DOT1X
Authenticated clients
DOT3ad
Port states
IGMP/MLD Snooping
Multicast groups, list of router ports, last query data for each VLAN
IPv6 NDP
Neighbor cache entries
iSCSI
Connections
LLDP
List of interfaces with MED devices attached
OSPFv2
Neighbors and designated routers
OSPFv3
Neighbors and designated routers
Route Table Manager
IPv4 and IPv6 dynamic routes
SIM
The system's MAC addresses. System up time. IP address, network mask,
default gateway on each management interface, DHCPv6 acquired IPv6
address.
Voice VLAN
VoIP phones identified by CDP or DHCP (not LLDP)