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Chapter 6 Cabling the Line Ports and Completing the Installation
Installing a Cascaded System
SCE 2000 4xGBE Installation and Configuration Guide
OL-7824-02 6-15
• Sniffing: allows the SCE 2000 platform to forward traffic on the specified link through the
bypass mechanism while still analyzing the traffic passively.
Sniffing is permitted to be configured for for all links, only (use the all-links option).
• Cutoff: completely cuts off flow of traffic through the specified link.
Note the following recommendations and restrictions:
• Since the SCE 1000 platform has only one link, the link is not specified.
• Since the SCE 2000 platforms have more than one link, it is required to specify the link. The
link designations are different for the GBE and FE platforms, as follows:
• SCE 2000 4xGBE: GBE1-GBE2/GBE3-GBE4
• SCE 2000 4/8xFE: LINK1/LINK2
• Use the 'all-links' option to configure the link mode for all links (SCE 2000 platforms
only).
• It is recommended that both links be configured together. Use the all-links option.
• Link mode is relevant only to inline topologies.
• It is recommended that in cascaded topologies, both SCE 2000 platforms be configured for
the same link mode, otherwise the service will be unpredictable.
• Sniffing can only be configured for all links, therefore, to configure sniffing, the all-links
option is required, not just recommended.
• 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.
To set the link mode:
Step 1 From the SCE 2000 (config if)# prompt, type link-mode [<link>|all-
links] [forwarding|bypass|sniffing|cutoff] and press Enter.
Monitoring the System
Use the following commands to view the current connection mode and link mode parameters.
To view the current connection mode:
Step 1 From the SCE 2000
#
prompt, type show interface linecard 0
connection-mode and press
Enter
.