Cisco WS-X6708-10G-3CXL= - 10 Gigabit Ethernet Module Manual de usuario descargar pdf (Pagina 50)

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Figure 37. Dual-Active Detection Using Fast-Hello

In order for fast-hello to operate, the interfaces must be enabled with this protocol. Unlike IP-BFD, that only

exchanges hello packets after the VSL fails, Fast-Hello exchanges heartbeat messages throughout the period that

the VSL remains up, thereby reducing the time it takes to detect the dual-active scenario.

vss(config)# interface fastethernet 1/2/40

vss(config-if)# dual-active fast-hello

WARNING: Interface FastEthernet1/2/40 placed in restricted config mode. All extraneous

configs removed!

Up to four interfaces (directly connected) on each chassis can be configured. These interfaces must be physical

interfaces, no logical ports (i.e. SVI).

vss(config-if)# no shutdown

vss(config-if)# exit

vss(config)# exit

vss# show run interface fastethernet 1/2/40

interface FastEthernet1/2/40

no switchport

no ip address

dual-active fast-hello

end

Once fast-hello has been configured, the existing configuration on the interface will be automatically removed and will

only be restricted for fast-hello configurations. Also, UDLD will be disabled on fast-hello pairs.

vss(config)# switch virtual domain 10

vss(config-vs-domain)# dual-active detection fast-hello

vss(config-vs-domain)# exit

Action upon Dual-Active Detection

Upon detecting the dual-active condition, the original active chassis enters into recovery mode and brings down all of

its interfaces except the VSL and nominated management interfaces, effectively removing the device from the

network.

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Cisco WS-X6708-10G-3CXL= - 10 Gigabit Ethernet Module Manual de usuario Pagina 50