Cisco SCE 1000 2xGBE User's Guide download pdf (Page 208)

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Chapter 7 Line Configuration

Enforcing the Link Mode

SCE 1000 2xGBE Release 2.0.10 User Guide

7-14 OL-7117-02

To edit the connection mode:

Step 1 From the SCE 1000(config if)# prompt, type connection-mode

inline|receive-only on-failure [bypass|cutoff] and press Enter.

EXAMPLE:

The following example sets the connection mode to inline and the on-failure mode to cutoff.

SCE 1000 (config if)# connection-mode inline on-failure cutoff

Enforcing the Link Mode

The SCE 1000 has an internal bypass mechanism used to maintain the link even when the SCE

1000 fails. This bypass mechanism has four possible modes of operation:

• bypass

• forwarding

• sniffing

• cutoff

Normally, the link mode is selected by the SCE 1000 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

1000 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 1000 for processing.

• Bypass: stops all forwarding of traffic on the specified link to the SCE 1000. Traffic still

flows on the link, but is not processed in any way by the SCE 1000.

This does not affect the redundancy states.

• Sniffing: allows theSCE 1000 to forward traffic on the specified link through the bypass

mechanism while still analyzing the traffic passively.

• Cutoff: completely cuts off flow of traffic through the specified link.

Note the following recommendations and restrictions:

• Link mode is relevant only to inline topologies.

• The default link mode is forwarding. When other link modes are selected, active service

control is not available and any service control configuration will not be applicable.

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Cisco SCE 1000 2xGBE User's Guide Page 208

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