Cisco Systems SCE 2000 4/8xFE manual Link Mode

Chapter 6 Cabling the Line Ports and Completing the Installation

Installing a Cascaded System

To configure the connection mode, use the following command:

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 platform in a two-SCE platform inline topology. Link 1 is connected to this SCE platform and the behavior of the SCE 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 platform that might be cascaded with the SCE platform in Example 1. This SCE platform would have to be the secondary SCE platform, and Link 0 would be connected to this SCE 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 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 platform has an internal hardware card used to maintain the links even when the SCE platform fails. This hardware card has four possible modes of operation:

•bypass

•forwarding

•cutoff

•sniffing

Normally, the link mode is selected by the SCE 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 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 platform for processing.

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

This does not affect the redundancy states.

Cisco SCE 2000 4/8xFE Installation and Configuration Guide

OL-7826-05 6-11