Hitless-supported services and protocols - FSX 800 and FSX 1600TABLE 13
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
• IPv6 ACLs
• Layer 2 switching (VLAN and 802.1Q-in-
Q)
• 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 management event. All
existing switched traffic flows continue
uninterrupted.
New switched flows are not learned by the
FastIron switch during the switchover
process and are flooded to the VLAN
members in hardware. After the new active
management module becomes operational,
new switched flows are learned and
forwarded accordingly. The Layer 2 control
protocol states are not interrupted during the
switchover process.
Configured ACLs, PBR or GRE & IPv6 to
IPv4 Tunnels will operate in a hitless
manner.
Layer 3 IPv4 routed
traffic
• BGP4
• IPv4 unicast forwarding
• OSPFv2
• OSPFv2 with ECMP
• Static routes
• IPv4 PIM (IPv4 non-stop multicast
routing needs to be enabled for IPv4 PIM
to be hitless.)
• VRRP
• VRRP-E
• GRE
• IPv6 to IPv4 Tunnels
Layer 3 routed traffic for supported protocols
is not impacted during a Hitless
management event.
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.
Configured ACLs, PBR or GRE & IPv6 to
IPv4 Tunnels will operate in a hitless
manner.
Operations, Administration, and Maintenance
124 FastIron Ethernet Switch Administration Guide
53-1003625-01
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