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Cisco SCE 2000 4xGBE Installation and Configuration Guide
OL-7824-07
Chapter 6 Cabling the Line Ports and Completing the Installation
Information About Cascaded Systems
•
Priority
— For each of the cascaded SCE platforms, this parameter defines whether it is the primary
or secondary device.
•
On-failure
— For each of the cascaded SCE platforms, this parameter determines whether the
system cuts the traffic or bypasses it when the SCE platform either has failed or is booting.
How to Configure the Connection Mode
Use the following command to configure the connection mode, including the following parameters:
•
inline/receive only
•
sce-id
•
behavior upon failure of the SCE platform
•
primary/secondary
Step 1
From the SCE(config if)# prompt, type
connection-mode inline-cascade/receive-only-cascade [sce-id
(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(config if)# connection-mode inline-cascade sce-id 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(config if)# connection-mode inline-cascade sce-id 0 priority secondary on-failure
bypass
How to Set the 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.)
