Brocade FastIron Ethernet Switch Stacking Configuration Guide - Manual (Page 100)

Hitless-supported services and protocols TABLE 18
Traffic type Supported protocols
and services Impact
Layer 2
switched
traffic,
including
unicast and
multicast
+
System-level
+
Layer 4
• 802.1p and
802.1Q
• 802.3ad - LACP
• 802.3af - PoE
• 802.3at - PoE+
• DSCP honoring
and Diffserv
• Dual-mode VLAN
• IGMP v1, v2, and
v3 snooping
• IPv4 ACLs
• Layer 2 switching
(VLAN and
802.1Q-in-Q)
• MAC-based
VLANs
• MLD v1 and v2
snooping
• MRP
• Multiple spanning
tree (MSTP)
• Physical port/link
state
• PIM SM snooping
• Port mirroring and
monitoring
• Port trunking
• Rapid spanning
tree (RSTP)
• Spanning tree
(STP)
• ToS-based QoS
• Policy Based
Routing
• Traffic policies
• UDLD
• VSRP
Layer 2 switched traffic is
not impacted during a
hitless stacking event. All
existing switched traffic
flows continue
uninterrupted.
New switched flows are
not learned by the switch
during the switchover
process and are flooded to
the VLAN members in
hardware. After the new
active controller becomes
operational, new switched
flows are learned and
forwarded accordingly.
The Layer 2 control
protocol states are not
interrupted during the
switchover process.
Layer 3
IPv4
routed
traffic
(unicast) • IPv4
unicast
forwarding
• Static
routes
• OSPF v2
• OSPF v2
with
ECMP
• VRRP
• VRRP-E
• BGP4+
Layer 3 routed
traffic for
supported
protocols is not
impacted
during a hitless
stacking event.
All existing
Layer 3 IPv4
multicast flows
and receivers
may be
interrupted.
Traffic will
converge to
normalcy after
the new active
module
becomes
operational.
Other Layer 3
protocols that
are not
supported will
be interrupted
during the
switchover or
failover.
If BGP4+
graceful restart
or OSPF
graceful restart
is enabled, it
will be
gracefully
restarted and
traffic will
converge to
normalcy after
the new active
module
becomes
operational.
For details
about OSPF
graceful restart
and BGP4+
graceful
restart, refer to
the FastIron
Ethernet
Switch Layer 3
Routing
Configuration
Guide.
Traditional Stacking
98 FastIron Ethernet Switch Stacking Configuration Guide
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