Cisco SCE 1000 2xGBE User's Guide download pdf (Page 45)

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Chapter 2 Topology

Topology-Related Parameters

SCE 1000 2xGBE Release 2.0.10 User Guide

OL-7117-02 2-9

Link Failure Reflection Parameter

The link failure reflection refers to the behavior of the SCE 1000 when one of the data links fails.

Some network redundant topologies require a layer 1 cutoff in order for the network element to

recognize the link failure and translate it into action (switch to redundant link). In this case, if one

of the ports fails, it must be reflected to the other port as well.

• Link failure-reflection: When one data port link fails, the SCE 1000 forces the other port

link down as well. The port will be forced down as long as the first port link is down. When

the problematic port link goes up, the other port link will also be turned on again.

• No link failure-reflection: Link failure is not reflected to the other port.

Note

Default value = no link failure-reflection

Status of the SCE 1000 After Abnormal Boot

This parameter determines whether the SCE 1000 returns to normal operational state after a

reboot caused by fatal error or abnormal shutdown. In general, it is desirable that the SCE 1000

resume operation, and as promptly as possible. However, in a redundant topology, a recovered

SCE 1000 may remain non-operational. In this case the platform that had been the backup and is

currently active will remain active.

The two options for this parameter are:

• Operational: The status of the SCE 1000 after abnormal boot is operational. The platform

automatically resumes functioning in the defined operational link bypass mode.

• Not Operational: The status of the SCE 1000 after abnormal boot is not operational. The

platform remains in the defined failure link bypass mode.

This option is to be used only in a redundant topology where a second, operational platform

exists.

Note

Default value = Operational for all non-redundant systems.

Must be explicitly configured for redundant topologies.

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