Cisco Systems SCE 2000 4xGBE manual Link Mode

Chapter 6 Cabling the Line Ports and Completing the Installation

Installing a Cascaded System

To configure the connection mode:

Step 1 From the SCE 2000(config if)# prompt, type connection-modeinline- cascade/receive-only-cascade[physically-connected-links{link-0/link-1}][priority {primary/secondary}] [on-failure{bypass/cutoff}] and press Enter.

EXAMPLE 1

Use the following command to configure the primary SCE 2000 platform in a two-SCE 2000 platform inline topology. Link 1 is connected to this SCE 2000 platform and the behavior of the SCE 2000 platform if a failure occurs is bypass.

SCE 2000(config if)# connection-mode inline-cascade physically-connected-links link-1 priority primary on-failure bypass

EXAMPLE 2

Use the following command to configure the SCE 2000 platform that might be cascaded with the SCE 2000 platform in Example 1. This SCE 2000 platform would have to be the secondary SCE 2000 platform, and Link 0 would be connected to this SCE 2000 platform, since Link 1 was connected to the primary. The connection mode would be the same as the first, and the behavior of the SCE 2000 platform if a failure occurs is also bypass.

SCE 2000(config if)# connection-mode inline-cascade physically-connected-links link-0 priority secondary on-failure bypass

Link Mode

The SCE 2000 platform has an internal hardware card used to maintain the links even when the SCE 2000 platform fails. This hardware card has four possible modes of operation:

•bypass

•forwarding

•cutoff

•sniffing

Normally, the link mode is selected by the SCE 2000 platform software according to the configured connection-mode. However, the link-modecommand can be used to enforce a specific desired mode. This may be useful when debugging the network, or in cases where we would like the SCE 2000 platform just to forward the traffic. (Note that this is only relevant to inline topologies even though the configuration is available also when in receive-only mode.)

The following link mode options are available:

•Forwarding: forwards traffic on the specified link to the SCE 2000 platform for processing.

•Bypass: stops all forwarding of traffic on the specified link to the SCE 2000 platform. Traffic still flows on the link, but is not processed in any way by the SCE 2000 platform.

This does not affect the redundancy states.

SCE 2000 4xGBE Installation and Configuration Guide

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