Technical data

FastIron Ethernet Switch Administration Guide 101
53-1002637-02
Hitless management on the FSX 800 and FSX 1600
3
TABLE 15 Hitless-supported services and protocols – FSX 800 and FSX 1600
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. Refer to “OSPF graceful restart”
and “BGP4 graceful restart” sections in the FastIron
Ethernet Switch Layer 3 Routing Configuration Guide.
Configured ACLs, PBR or GRE & IPv6 to IPv4 Tunnels
will operate in a hitless manner.