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Chapter 6 Cabling the Line Ports and Completing the Installation

Installing a Cascaded System

Cisco SCE 2000 4/8xFE Installation and Configuration Guide

OL-7826-05 6-11

To configure the connection mode, use the following command:

From the SCE 2000(config if)# prompt, type connection-mode inline-

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-mode command 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.

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